School of Physics and Astronomy

Search site

Prof Helen F Gleeson

Head of School of Physics
Soft Matter Group

Contact details

Room: 9.53
Tel: +44 (0)113 3433863
Email: H.F.Gleeson @ leeds.ac.uk
Email: headphys @ leeds.ac.uk (Head of School of Physics)

Keywords

Liquid Crystals
Photonic Materials
Devices
Sensors
Soft Matter
Self assembly

Research interests

My research concerns self-ordering and self-assembling materials, particularly liquid crystal phases. I'm an experimentalist and use a variety of approaches to understand liquid crystal structures - I aim to determine how the nanoscale properties of complex molecules affect their macroscopic physics.

Much of my work involves understanding liquid crystal systems with reduced symmetry (for example chiral or biaxial phases), both in the bulk and in devices. I have investigated biological systems as well as synthetic liquid crystal materials and an important part of my research is to understand how liquid crystals can be used for novel photonic devices and applications. I have developed novel experimental techniques to study these complex, self-organising materials and optically active media. The new experimental approaches I have developed include time-resolved and resonant x-ray scattering at synchrotrons and a variety of optical and electro-optical measurements (Raman scattering, Kerr effect etc.). These allow a deep insight into systems that show ferroelectric, ferrielectric and antiferroelectric properties, blue phases and unusual nematic systems.

Liquid crystals are perhaps best known for their use in display devices and I'm very interested developing new applications. I produced the first graphene-based liquid crystal device in collaboration with the Profs. Geim and Novoselov, who won the Nobel Prize for their discovery of graphene. I have worked on light sensitive (photochromic) materials and laser tweezers for transferring the angular momentum from light to liquid crystal droplets. Using liquid crystal physics to inform the study of biological systems provides a very powerful approach to understanding complex systems, for example the methodology normally used to predict the optics of liquid crystal devices provided a physiologically realistic mechanism for the perception of polarized light in vertebrates. Our most recent work on devices has led to the invention of switchable contact lenses in which the voltage-induced change in refractive index of the liquid crystal lens element causes a change in focus, equivalent to putting on reading glasses! Liquid crystals are intriguing and fun with much scope for both challenging fundamental physics and inventive new devices.

Publications

Oh J, Gleeson HF, Dierking I Electric-field-induced transport of microspheres in the isotropic and chiral nematic phase of liquid crystals Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 95 -, 2017
DOI:10.1103/PhysRevE.95.022703
View abstract

Zhang Z, Kaur S, Kundu B, Sadashiva BK, Gleeson HF Observing the emergence of phase biaxiality in a polar smectic A system via polarised Raman spectroscopy Journal of Materials Chemistry C 5 1195-1205, 2017
DOI:10.1039/c6tc04572c
View abstract

Zhang Z, Kaur S, Gleeson HF Polarised Raman spectroscopy and dielectric spectroscopy data ofa polar smectic A liquid crystal system., 2017
DOI:10.5518/117

Addis J, Kaur S, Binks DJ, Dickinson MR, Greco C, Ferrarini A, Görtz V, Goodby JW, Gleeson HF Second-harmonic generation and the influence of flexoelectricity in the nematic phases of bent-core oxadiazoles Liquid Crystals 43 1315-1332, 2016
DOI:10.1080/02678292.2016.1172355
View abstract

Gleeson HF, Masters AJ Foreword Molecular Crystals and Liquid Crystals 632 1-, 2016
DOI:10.1080/15421406.2016.1184077

Kaur S, Kim YJ, Milton H, Mistry D, Syed IM, Bailey J, Novoselov KS, Jones JC, Morgan PB, Clamp J, Gleeson HF Graphene electrodes for adaptive liquid crystal contact lenses Optics Express 24 8782-8787, 2016
DOI:10.1364/OE.24.008782
View abstract

Wei DL, Dickinson MR, Smith N, Gleeson HF Understanding local forces in electrophoretic ink systems: Utilizing optical tweezers to explore electrophoretic display devices, 2016
DOI:10.1117/12.2237675
View abstract

Labeeb A, Gleeson HF, Hegmann T Polymer stabilization of the smectic C-alpha∗ liquid crystal phase - Over tenfold thermal stabilization by confining networks of photo-polymerized reactive mesogens Applied Physics Letters 107 -, 2015
DOI:10.1063/1.4937564
View abstract

Zhang Z, Panov VP, Nagaraj M, Mandle RJ, Goodby JW, Luckhurst GR, Jones JC, Gleeson HF Raman scattering studies of order parameters in liquid crystalline dimers exhibiting the nematic and twist-bend nematic phases Journal of Materials Chemistry C 3 10007-10016, 2015
DOI:10.1039/c5tc02174j
View abstract

Nagaraj M, Jones JC, Panov VP, Liu H, Portale G, Bras W, Gleeson HF Understanding the unusual reorganization of the nanostructure of a dark conglomerate phase Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 91 -, 2015
DOI:10.1103/PhysRevE.91.042504
View abstract

Gleeson HF, Miller RJ, Tian L, Görtz V, Goodby JW Liquid crystal blue phases: stability, field effects and alignment Liquid Crystals 42 760-771, 2015
DOI:10.1080/02678292.2014.1002821
View abstract

Syed IM, Kaur S, Milton HE, Mistry D, Bailey J, Morgan PB, Jones JC, Gleeson HF Novel switching mode in a vertically aligned liquid crystal contact lens Optics Express 23 9911-9916, 2015
DOI:10.1364/OE.23.009911
View abstract

Zhang Z, Gleeson H Polarised Raman Spectroscopy data of dimer liquid crystals, 2015
DOI:10.5518/14

Kaur S, Panov VP, Greco C, Ferrarini A, Görtz V, Goodby JW, Gleeson HF Flexoelectricity in an oxadiazole bent-core nematic liquid crystal Applied Physics Letters 105 -, 2014
DOI:10.1063/1.4903242
View abstract

Milton HE, Nagaraj M, Kaur S, Jones JC, Morgan PB, Gleeson HF Field-induced refractive index variation in the dark conglomerate phase for polarization-independent switchable liquid crystal lenses Applied Optics 53 7278-7284, 2014
DOI:10.1364/AO.53.007278
View abstract

Gleeson HF, Kaur S, Görtz V, Belaissaoui A, Cowling S, Goodby JW The nematic phases of bent-core liquid crystals ChemPhysChem 15 1251-1260, 2014
DOI:10.1002/cphc.201400014
View abstract

Nagaraj M, Usami K, Zhang Z, Görtz V, Goodby JW, Gleeson HF Unusual electric-field-induced transformations in the dark conglomerate phase of a bent-core liquid crystal Liquid Crystals 41 800-811, 2014
DOI:10.1080/02678292.2014.885602
View abstract

Nagaraj M, Görtz V, Goodby JW, Gleeson HF Electrically tunable refractive index in the dark conglomerate phase of a bent-core liquid crystal. Applied Physics Letters 104 -, 2014
DOI:10.1063/1.4861837
View abstract

Gleeson HF, Dickinson MR, Sanders JE, Yang Y Twisting and tweezing liquid crystals with lasers, 2014
DOI:10.1117/12.2044247
View abstract

Milton HE, Gleeson HF, Morgan PB, Goodby JW, Cowling S, Clamp JH Switchable liquid crystal contact lenses: Dynamic vision for the ageing eye, 2014
DOI:10.1117/12.2044676
View abstract

Johnson L, Jaradat S, Gleeson HF Field induced transitions and interlayer interactions in intermediate smectic phases. Journal of Materials Chemistry C 2 147-157, 2014
DOI:10.1039/c3tc31539h
View abstract

Milton HE, Morgan PB, Clamp JH, Gleeson HF Electronic liquid crystal contact lenses for the correction of presbyopia Optics Express 22 8035-8040, 2014
DOI:10.1364/OE.22.008035
View abstract

Tian L, Goodby JW, Görtz V, Gleeson HF The magnitude and temperature dependence of the Kerr constant in liquid crystal blue phases and the dark conglomerate phase Liquid Crystals 40 1446-1454, 2013
DOI:10.1080/02678292.2013.836253
View abstract

Kaur S, Liu H, Addis J, Greco C, Ferrarini A, Görtz V, Goodby JW, Gleeson HF The influence of structure on the elastic, optical and dielectric properties of nematic phases formed from bent-core molecules Journal of Materials Chemistry C 1 6667-6676, 2013
DOI:10.1039/c3tc31545b
View abstract

Sanders JL, Yang Y, Dickinson MR, Gleeson HF Pushing, pulling and twisting liquid crystal systems: Exploring new directions with laser manipulation Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 371 -, 2013
DOI:10.1098/rsta.2012.0265
View abstract

Kaur S, Tian L, Liu H, Greco C, Ferrarini A, Seltmann J, Lehmann M, Gleeson HF The elastic and optical properties of a bent-core thiadiazole nematic liquid crystal: The role of the bend angle Journal of Materials Chemistry C 1 2416-2425, 2013
DOI:10.1039/c3tc00852e
View abstract

Gleeson HF, Jaradat S, Labeeb A, Osipov M Field-induced transitions between antiferroelectric and ferrielectric phases, 2012
DOI:10.1080/00150193.2012.684619
View abstract

Kaur S, Addis J, Greco C, Ferrarini A, Görtz V, Goodby JW, Gleeson HF Understanding the distinctive elastic constants in an oxadiazole bent-core nematic liquid crystal Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 86 -, 2012
DOI:10.1103/PhysRevE.86.041703
View abstract

Siemianowski SD, Brimicombe PD, Jaradat S, Thompson P, Bras W, Gleeson HF Reorientation mechanisms in smectic A liquid crystals Liquid Crystals 39 1261-1275, 2012
DOI:10.1080/02678292.2012.714486
View abstract

Barois P, Gleeson H, Huang CC, Pindak R Application of X-ray resonant diffraction to structural studies of liquid crystals European Physical Journal: Special Topics 208 333-350, 2012
DOI:10.1140/epjst/e2012-01628-9
View abstract

Milton H, Brimicombe P, Morgan P, Gleeson H, Clamp J Optimization of refractive liquid crystal lenses using an efficient multigrid simulation Optics Express 20 11159-11165, 2012
View abstract

Gleeson HF, Brimicombe PD Comment on "raman scattering study of phase biaxiality in a thermotropic bent-core nematic liquid crystal" Physical Review Letters 107 -, 2011
DOI:10.1103/PhysRevLett.107.109801
View abstract

Kaur S, Belaissaoui A, Goodby JW, Görtz V, Gleeson HF Nonstandard electroconvection in a bent-core oxadiazole material Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 83 -, 2011
DOI:10.1103/PhysRevE.83.041704
View abstract

Jaradat S, Brimicombe PD, Osipov MA, Pindak R, Gleeson HF A field-induced ferrielectric liquid crystal phase Applied Physics Letters 98 -, 2011
DOI:10.1063/1.3545847
View abstract

Sanders JL, Dickinson MR, Gleeson HF Laser tweezers for determining anisotropic viscosity coefficients of nematic liquid crystals, 2010
DOI:10.1117/12.862853
View abstract

Yoon HG, Dierking I, Gleeson HF Cholesteric pitch divergence near smectic phase transitions Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 82 -, 2010
DOI:10.1103/PhysRevE.82.011705
View abstract

Gleeson HF, Southern CD, Brimicombe PD, Goodby JW, Görtz V Optical measurements of orientational order in uniaxial and biaxial nematic liquid crystals Liquid Crystals 37 949-959, 2010
DOI:10.1080/02678292.2010.488818
View abstract

Kaur S, Dierking I, Gleeson HF Dielectric spectroscopy of polymer stabilised ferroelectric liquid crystals European Physical Journal E 30 265-274, 2009
DOI:10.1140/epje/i2009-10518-3
View abstract

Pollard AJ, Nair RR, Sabki SN, Staddon CR, Perdigao LMA, Hsu CH, Garfitt JM, Gangopadhyay S, Gleeson HF, Geim AK, Beton PH Formation of monolayer graphene by annealing sacrificial nickel thin films Journal of Physical Chemistry C 113 16565-16567, 2009
DOI:10.1021/jp906066z
View abstract

Chang HS, Jaradat S, Gleeson HF, Dierking I, Osipov MA Stabilization of the smectic- Cα-〈FOR VERIFICATION> phase in mixtures with chiral dopants Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 79 -, 2009
DOI:10.1103/PhysRevE.79.061706
View abstract

Xiang Y, Goodby JW, Görtz V, Gleeson HF Revealing the uniaxial to biaxial nematic liquid crystal phase transition via distinctive electroconvection Applied Physics Letters 94 -, 2009
DOI:10.1063/1.3138867
View abstract

Jaradat S, Brimicombe PD, Southern C, Siemianowski SD, Dimasi E, Pindak R, Gleeson HF Stable field-induced ferrielectric liquid crystal phases in devices Applied Physics Letters 94 -, 2009
DOI:10.1063/1.3119208
View abstract

Brimicombe PD, Siemianowski SD, Jaradat S, Levine YK, Thompson P, Bras W, Gleeson HF Time-resolved x-ray studies of the dynamics of smectic- A layer realignment by magnetic fields Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 79 -, 2009
DOI:10.1103/PhysRevE.79.031706
View abstract

Görtz V, Southern C, Roberts NW, Gleeson HF, Goodby JW Unusual properties of a bent-core liquid-crystalline fluid Soft Matter 5 463-471, 2009
DOI:10.1039/b808283a
View abstract

Jaradat S, Brimicombe PD, Roberts NW, Southern C, Gleeson HF Asymmetric switching in a ferrielectric liquid crystal device Applied Physics Letters 93 -, 2008
DOI:10.1063/1.3001933
View abstract

Osipov MA, Gorkunov MV, Gleeson HF, Jaradat S Molecular models for ferroelectric liquid crystals with conventional and anomalously weak layer contraction European Physical Journal E 26 395-404, 2008
DOI:10.1140/epje/i2008-10339-x
View abstract

Blake P, Brimicombe PD, Nair RR, Booth TJ, Jiang D, Schedin F, Ponomarenko LA, Morozov SV, Gleeson HF, Hill EW, Geim AK, Novoselov KS Graphene-based liquid crystal device Nano Letters 8 1704-1708, 2008
DOI:10.1021/nl080649i
View abstract

Southern CD, Brimicombe PD, Siemianowski SD, Jaradat S, Roberts N, Görtz V, Goodby JW, Gleeson HF Thermotropic biaxial nematic order parameters and phase transitions deduced by Raman scattering EPL 82 -, 2008
DOI:10.1209/0295-5075/82/56001
View abstract

Yang Y, Brimicombe PD, Roberts NW, Dickinson MR, Osipov M, Gleeson HF Continuously rotating chiral liquid crystal droplets in a linearly polarized laser trap Optics Express 16 6877-6882, 2008
DOI:10.1364/OE.16.006877
View abstract

Jaradat S, Brimicombe PD, Southern C, Siemianowski SD, Dimasi E, Osipov M, Pindak R, Gleeson HF Unexpected field-induced phase transitions between ferrielectric and antiferroelectric liquid crystal structures Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 77 -, 2008
DOI:10.1103/PhysRevE.77.010701
View abstract

Southern CD, Gleeson HF Using the full Raman depolarisation in the determination of the order parameters in liquid crystal systems European Physical Journal E 24 119-127, 2007
DOI:10.1140/epje/i2007-10223-3
View abstract

Brimicombe PD, Roberts NW, Jaradat S, Southern C, Wang ST, Huang CC, Dimasi E, Pindak R, Gleeson HF Deduction of the temperature-dependent structure of the four-layer intermediate smectic phase using resonant X-ray scattering European Physical Journal E 23 281-287, 2007
DOI:10.1140/epje/i2007-10189-0
View abstract

Yoon HG, Gleeson HF Accurate modelling of multilayer chiral nematic devices through the Berreman 4× 4 matrix methods Journal of Physics D: Applied Physics 40 3579-3586, 2007
DOI:10.1088/0022-3727/40/12/006
View abstract

Baciu M, Sebai SC, Oscar CES, Mulet X, Ciarke JA, Shearman GC, Law RV, Templer RH, Plisson C, Parker CA, Antony GEE, Samulski ET, Kornyshev AA, Gleeson HF, Roberts NW Degradative transport of cationic amphiphilic drugs across phospholipid bilayers Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364 2597-2614, 2006
DOI:10.1098/rsta.2006.1842
View abstract

Gleeson HF, Wood TA, Dickinson M Laser manipulation in liquid crystals: An approach to microfluidics and micromachines Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364 2789-2805, 2006
DOI:10.1098/rsta.2006.1855
View abstract

Palffy-Muhoray P, Cao W, Moreira M, Taheri B, Munoz A Photonics and lasing in liquid crystal materials Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364 2747-2761, 2006
DOI:10.1098/rsta.2006.1851
View abstract

Seddon JM, Squires AM, Conn CE, Ces O, Heron AJ, Mulet X, Shearman GC, Templer RH, Gleeson HF, Percec V, Lagerwall ST, Palffy-Muhoray P, Safinya CR Pressure-jump X-ray studies of liquid crystal transitions in lipids Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364 2635-2655, 2006
DOI:10.1098/rsta.2006.1844
View abstract

Sambles JR, Kelly R, Yang F, Smith NJ, Cowling SJ, Lacey D, Palffy-Muhoray P, Gleeson HF Metal slits and liquid crystals at microwave frequencies Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364 2733-2746, 2006
DOI:10.1098/rsta.2006.1850
View abstract

Jaradat S, Roberts NW, Wang Y, Hirst LS, Gleeson HF Remarkably wide four-layer smectic phases in mixtures of liquid crystals and highly chiral dopants Journal of Materials Chemistry 16 3753-3761, 2006
DOI:10.1039/b608229g
View abstract

Stipetic A, Goodby J, Hird M, Raoul Y, Gleeson H High tilt antiferroelectric esters bearing a perfluorobutanoyloxy terminal chain: The influence of lateral fluoro substituents on mesomorphic behaviour, tilt angle, and spontaneous polarization Liquid Crystals 33 819-828, 2006
DOI:10.1080/02678290600722999
View abstract

Cowling SJ, Hall AW, Goodby JW, Wang Y, Gleeson HF Examination of the interlayer strength of smectic liquid crystals through the study of partially fluorinated and branched fluorinated end-groups Journal of Materials Chemistry 16 2181-2191, 2006
DOI:10.1039/b517913k
View abstract

Yoon HG, Roberts NW, Gleeson HF An experimental investigation of discrete changes in pitch in a thin, planar chiral nematic device Liquid Crystals 33 503-510, 2006
DOI:10.1080/02678290600633501
View abstract

Gleeson HF, Roberts NW, Conn J, Jaradat S, Wang Y Mechanisms of switching in an antiferroelectric liquid crystal device revealed by time-resolved X-ray scattering Liquid Crystals 33 451-457, 2006
DOI:10.1080/02678290500487099
View abstract

Grigorenko AN, Gleeson HF, Zhang Y, Roberts NW, Sidorov AR, Panteleev AA Antisymmetric plasmon resonance in coupled gold nanoparticles as a sensitive tool for detection of local index of refraction Applied Physics Letters 88 -, 2006
DOI:10.1063/1.2187432
View abstract

Gleeson HF, Hirst LS Resonant X-ray scattering: A tool for structure elucidation in liquid CRYSTALS ChemPhysChem 7 321-328, 2006
DOI:10.1002/cphc.200500426
View abstract

Roberts NW, Jaradat S, Hirst LS, Thurlow MS, Wang Y, Wang ST, Liu ZQ, Huang CC, Bai J, Pindak R, Gleeson HF Biaxiality and temperature dependence of 3- and 4-layer intermediate smectic-phase structures as revealed by resonant X-ray scattering Europhysics Letters 72 976-982, 2005
DOI:10.1209/epl/i2005-10336-3
View abstract

Conn J, Roberts NW, Gleeson HF Investigation into the effects of optical tilt angle profile, biaxiality and dispersion of the optic axis on the calculation of reflection spectra of SmC* liquid crystal films Ferroelectrics 315 205-211, 2005
DOI:10.1080/00150190490510249
View abstract

Singh U, Gleeson H The effect of polymer stabilization on phase transitions in a series of antiferroelectric heterocyclic esters, 2005
DOI:10.1080/15421400590954885
View abstract

Singh U, Gleeson H The effect of electric fields on selective reflection in the SmC* phase of two antiferroelectric liquid crystals, 2005
DOI:10.1080/15421400590958098
View abstract

Singh U, Gleeson H Optical Bragg scattering from a polymer-stabilized anti-ferroelectric liquid crystal Ferroelectrics 321 53-61, 2005
DOI:10.1080/00150190500259673
View abstract

Grigorenko AN, Geim AK, Gleeson HF, Zhang Y, Firsov AA, Khrushchev IY, Petrovic J Nanofabricated media with negative permeability at visible frequencies Nature 438 335-338, 2005
DOI:10.1038/nature04242
View abstract

Gleeson HF, Winlow R, Whitehouse R Contrast adjustment of radiological images using liquid crystal devices, 2004
DOI:10.1080/15421400490439275
View abstract

Hird M, Raoul Y, Goodby JW, Gleeson H Chirality issues and interesting properties of achiral and racemic materials with bent molecular structures, 2004
DOI:10.1080/00150190490509971
View abstract

Roberts NW, Guillou JPS, Gleeson HF, Kirar I, Watson SJ, Arikainen EO Optical properties of cholesteric materials used in surface stabilised cholesteric texture devices, 2004
DOI:10.1080/15421400490434793
View abstract

Wang Y, Gleeson HF Phase behaviour of an antiferroelectric liquid crystal studied by raman spectroscopy, 2004
DOI:10.1080/00150190490511202
View abstract

Roberts NW, Gleeson HF The absorption of polarized light by vertebrate photoreceptors Vision Research 44 2643-2652, 2004
DOI:10.1016/j.visres.2004.06.001
View abstract

Wood TA, Gleeson HF, Dickinson MR, Wright AJ Mechanisms of optical angular momentum transfer to nematic liquid crystalline droplets Applied Physics Letters 84 4292-4294, 2004
DOI:10.1063/1.1753067
View abstract

Gleeson HF, Wang Y, Watson S, Sahagun-Sanchez D, Goodby JW, Hird M, Petrenko A, Osipov MA On the temperature dependence of the tilt and spontaneous polarisation in high tilt antiferroelectric liquid crystals Journal of Materials Chemistry 14 1480-1485, 2004
DOI:10.1039/b314747a
View abstract

Roberts NW, Gleeson HF, Temple SE, Haimberger TJ, Hawryshyn CW Differences in the optical properties of vertebrate photoreceptor classes leading to axial polarization sensitivity Journal of the Optical Society of America A: Optics and Image Science, and Vision 21 335-345, 2004
View abstract

Gleeson HF Structures and electric field effects in ferro-, ferri- and antiferro-electric liquid crystal devices, 2003
DOI:10.1080/15421400390243228
View abstract

Hamaneh MB, Gleeson HF, Taylor PL Theory of layer structure in ferroelectric liquid crystal devices in applied electric fields Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 68 517041-517048, 2003
View abstract

Wright AJ, Wood TA, Dickinson MR, Gleeson HF, Mullin T The transverse trapping force of an optical trap: Factors affecting its measurement Journal of Modern Optics 50 1521-1532, 2003
DOI:10.1080/0950034021000036232
View abstract

Roberts NW, Gleeson HF, Bowring N, Seed A, Nassif LN, Herbert MR, Goodby JW, Hird M An experimental and theoretical investigation into the reflection spectra of SmC and SmCAphases Journal of Materials Chemistry 13 353-359, 2003
DOI:10.1039/b208506b
View abstract

Gleeson HF, Murray AJ, Fraser E, Zoro A An electrically addressed liquid crystal filter for tunable lasers Optics Communications 212 165-168, 2002
DOI:10.1016/S0030-4018(02)01960-0
View abstract

Hirst LS, Watson SJ, Gleeson HF, Cluzeau P, Barois P, Pindak R, Pitney J, Cady A, Johnson PM, Huang CC, Levelut AM, Srajer G, Pollmann J, Caliebe W, Seed A, Herbert MR, Goodby JW, Hird M Interlayer structures of the chiral smectic liquid crystal phases revealed by resonant x-ray scattering Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 65 -, 2002
DOI:10.1103/PhysRevE.65.041705
View abstract

Watson SJ, Matkin LS, Baylis LJ, Bowring N, Gleeson HF, Hird M, Goodby J Influence of electric fields on the smectic layer structure of ferroelectric and antiferroelectric liquid crystal devices Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 65 -, 2002
DOI:10.1103/PhysRevE.65.031705
View abstract

Serak SV, Arikainen EO, Gleeson HF, Grozhik VA, Guillou JP, Usova NA Laser-induced concentric colour domains in a cholesteric liquid crystal mixture containing a nematic azobenzene dopant Liquid Crystals 29 19-26, 2002
DOI:10.1080/02678290110093778
View abstract

Findon A, Gleeson HF The realignment of an achiral smectic C chevron structure with applied field Liquid Crystals 29 79-85, 2002
DOI:10.1080/02678290110086497
View abstract

Wood TA, Wright A, Gleeson HF, Dickinson M, Mullin T, Murray A Investigation of the factors affecting the transverse force measurements of an optical trap. Part I, 2002
DOI:10.1117/12.463827
View abstract

Wright A, Wood T, Dickinson M, Gleeson H, Mullin T, Murray A Investigation of the factors affecting the transverse force measurements of an optical trap. Part II, 2002
DOI:10.1117/12.468344
View abstract

Singh U, Gleeson HF, Goodby JW, Hird M Optical bragg reflections from a series of antiferroelectric hetrocyclic esters, 2002
DOI:10.1080/00150190214447
View abstract

Findon A, Gleeson HF Elastic constants of an achiral smectic-C material, 2002
DOI:10.1080/00150190214449
View abstract

Gleeson HF, Bryant GK, Morse AS Time-resolved X-ray scattering studies of reversible layer flexing in a surface stabilised ferroelectric liquid crystal device Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 362 203-215, 2001
View abstract

Singh U, Watson SJ, Gleeson HF Phase behaviour of polymer-liquid crystal and polymer-polymer blends Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 365 297-304, 2001
View abstract

Shaw CP, Roy SS, Whatmore RW, Gleeson H, Huang Z, Zhang Q, Dunn S Growth and characterisation of lead zirconate titanate (30/70) thin films using TiO2seeding for oxide ferroelectric-liquid crystal display application, 2001
DOI:10.1080/00150190108015981
View abstract

Roy SS, Gleeson HF, Whatmore RW, Shaw CP, Zhang Q Effects of pulsed electric fields on a nematic device with a ferroelectric ceramic substrate Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 368 9-15, 2001
View abstract

Hird M, Goodby JW, Toyne KJ, Gleeson HF, Peter Buxton I, Seed AJ, Herbert MR The synthesis and mesomorphic properties of some novel antiferroelectric liquid crystals Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 365 213-220, 2001
View abstract

Whatmore RW, Shaw CP, Zhang Q, Roy SS, Gleeson HF Oxide ferroelectric thin film/nematic liquid crystal devices Integrated Ferroelectrics 41 3-16, 2001
DOI:10.1080/10584580108012802
View abstract

Watson SJ, Gleeson HF, D'Emanuele A An examination of the drug transport properties of liquid crystal embedded membranes Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 367 435-443, 2001
View abstract

Cady A, Pitney JA, Pindak R, Matkin LS, Watson SJ, Gleeson HF, Cluzeau P, Barois P, Levelut AM, Caliebe W, Goodby JW, Hird M, Huang CC Orientational ordering in the chiral smectic-C*F12liquid crystal phase determined by resonant polarized x-ray diffraction Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 64 -, 2001
View abstract

Singh U, Hunte C, Gleeson H Optical activity of a side group cholesteric liquid crystalline silicone Liquid Crystals 28 697-701, 2001
DOI:10.1080/02678290010023334
View abstract

Serak S, Kovalev A, Agashkov A, Gleeson HF, Watson SJ, Reshetnyak V, Yaroshchuk O Laser-induced surface and bulk reorientation of the director in azo-dye-doped liquid crystal cells Optics Communications 187 235-247, 2001
DOI:10.1016/S0030-4018(00)01111-1
View abstract

Singh U, Davis F, Gleeson H Phase transitions in mixtures of a nematic polymer and chiral nematic liquid crystals which form blue phases Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals 357 239-247, 2001
View abstract

Matkin LS, Watson SJ, Gleeson HF, Pindak R, Pitney J, Johnson PM, Huang CC, Barois P, Levelut AM, Srajer G, Pollmann J, Goodby JW, Hird M Resonant x-ray scattering study of the antiferroelectric and ferrielectric phases in liquid crystal devices Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 64 217051-217056, 2001
DOI:10.1103/PhysRevE.64.021705
View abstract

Roy SS, Gleeson H, Shaw CP, Whatmore RW, Huang Z, Zhang Q, Dunn S Growth and characterisation of lead zirconate titanate (30/70) on indium tin oxide coated glass for oxide ferroelectric-liquid crystal display application Integrated Ferroelectrics 29 189-213, 2000
View abstract

Findon A, Gleeson H, Lydon J Realignment of a smectic-A phase with applied electric field Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics 62 5137-5142, 2000
View abstract

Matkin LS, Gleeson HF, Mach P, Huang CC, Pindak R, Srajer G, Pollmann J, Goodby JW, Hird M, Seed A Resonant x-ray scattering at the Se edge in liquid crystal free-standing films and devices Applied Physics Letters 76 1863-1865, 2000
View abstract

Watson SJ, Gleeson HF, D'Emanuele A, Serak S, Grozhik V A Study of Photochromic Azobenzene Liquid Crystals as Controlled Release Drug Delivery Systems Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 331 375-382, 1999
View abstract

Mills JT, Gleeson HF, Goodby JW, Hird M, Seed A, Styring P Comparison of the optical and steric tilt in antiferroelectric liquid crystals Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 330 1693-1700, 1999
View abstract

Gleeson HF, Baylis L, Robinson WK, Mills JT, Goodby JW, Seed A, Hird M, Styring P, Rosenblatt C, Zhang S Preliminary communication: A possible structural model of the SmCβ* phase Liquid Crystals 26 1415-1419, 1999
View abstract

Miller RJ, Gleeson HF, Lydon JE An optical study of the structure of the helicoidal twist grain boundary (TGBA) phase Journal of Physics Condensed Matter 11 1423-1433, 1999
View abstract

Hubbard JF, Gleeson HF, Whatmore RW, Shaw CP, Zhang Q, Murray AJ Local Fréedericksz transitions at a nematic liquid crystal/thin film oxide ferroelectric interface Liquid Crystals 26 601-604, 1999
View abstract

Baylis LJ, Gleeson HF, Seed AJ, Styring PJ, Hird M, Goodby JW Conoscopic Observations of Multiple Ferrielectricity in a Chiral Liquid Crystal Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 328 13-20, 1999
View abstract

Hubbard JF, Gleeson HF, Whatmore RW, Shaw CP, Zhang Q, Murray AJ Interaction of poled thin film ferroelectrics with nematic liquid crystals Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 329 1103-1110, 1999
View abstract

Miller RJ, Gleeson HF, Lydon JE Kossel diagram of an aligned cholesteric phase Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics 59 1821-1827, 1999
View abstract

Miller RJ, Gleeson HF, Lydon JE Optical Kossel line study of an aligned monodomain sample of a cholesteric phase: Temperature evolution of the Kossel diagram Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics 59 1828-1833, 1999
View abstract

Hubbard JF, Gleeson HF, Whatmore RW, Shaw CP, Zhang Q Coupling of the remanent polarisation in thin film oxide ferroelectrics with nematic liquid crystals Journal of Materials Chemistry 9 375-380, 1999
DOI:10.1039/a807684g
View abstract

Watson SJ, Gleeson HF, D'Emanuele A, Serak S, Grozhik V A study of in situ isothermal phase transitions in photochromic liquid crystals, 1998
DOI:10.1117/12.311532
View abstract

Grozhik V, Gleeson H, Serak S, Watson S, Agashkov A Study of optical switching and reorientation in liquid crystals of homologous series of 4-n-butyl-4'-n-alkoxyazobenzenes Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 320 433-444, 1998
View abstract

Storrow GM, Gleeson HF, Murray AJ An analysis of the optical properties of a single-element liquid crystal device Pure and Applied Optics (Print edition) (United Kingdom) 7 1411-1423, 1998
DOI:10.1088/0963-9659/7/6/019
View abstract

Ali-Adib Z, Clarkson GJ, McKeown NB, Treacher KE, Gleeson HF, Stennett AS Molecular assemblies of novel amphiphilic phthalocyanines: An investigation into the self-ordering properties of complex functional materials Journal of Materials Chemistry 8 2371-2378, 1998
View abstract

Findon A, Gleeson HF, Lydon J An unusual chevron structure in an achiral smectic C liquid crystal device Liquid Crystals 25 631-638, 1998
View abstract

Mills JT, Gleeson HF, Goodby JW, Hird M, Seed A, Styring P X-ray and optical studies of the tilted phases of materials exhibiting antiferroelectric, ferrielectric and ferroelectric mesophases Journal of Materials Chemistry 8 2385-2390, 1998
View abstract

Bryant GK, Gleeson HF, Ryan AJ, Fairclough JPA, Bogg D, Goossens JGP, Bras W Raman spectroscopy combined with small angle x-ray scattering and wide angle x-ray scattering as a tool for the study of phase transitions in polymers Review of Scientific Instruments 69 2114-2117, 1998
View abstract

Bryant GK, Gleeson HF Evolution of irreversible layer deformations in FLC devices caused by high electric field treatment Ferroelectrics 214 35-42, 1998
View abstract

Morse A, Gleeson HF Time-resolved x-ray studies of layer behaviour during operation of a ferroelectric device Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 302 121-126, 1997
View abstract

Seed AJ, Hird M, Styring P, Gleeson HF, Mills JT Heterocyclic esters exhibiting frustrated liquid crystal phases Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 299 19-25, 1997
View abstract

Bryant GK, Gleeson HF, Yasuda A, Reimer D Time resolved FT-IR study of the switching dynamics of FLC devices Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 302 41-46, 1997
View abstract

Mills J, Miller R, Gleeson H, Seed A, Hird M, Styring P The physical properties of a series of antiferroelectric hetrocyclic esters Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 303 145-152, 1997
View abstract

Miller RJ, Gleeson HF, Lydon JE Novel features in blue phase Kossel diagrams Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals 302 145-150, 1997
View abstract

Morse AS, Gleeson HF, Cummings S Time resolved X-ray diffraction studies of electric field induced layer motion in a chevron geometry smectic a liquid crystal device Liquid Crystals 23 717-722, 1997
View abstract

Morse AS, Gleeson HF Observation of a chevron hybrid structure in the smectic A phase of a liquid crystal device Liquid Crystals 23 531-535, 1997
View abstract

Miller RJ, Gleeson HF, Lydon JE Many-wave light scattering features in blue-phase kossel diagrams and the phase problem Physical Review Letters 77 857-860, 1996
View abstract

Robinson WK, Gleeson HF, Hird M, Seed AJ, Styring P The synthesis, mesomorphic behaviour and physical properties of a chiral liquid crystal exhibiting an antiferroelectric smectici phase Ferroelectrics 178 249-266, 1996
View abstract

Robinson WK, Miller RJ, Gleeson HF, Hird M, Seed AJ, Styring P Antiferroelectricity in novel liquid crystalline materials Ferroelectrics 178 237-247, 1996
View abstract

Li JF, Shack EA, Yu YK, Wang XY, Rosenblatt C, Neubert ME, Keast SS, Gleeson H Cell thickness-induced ferrielectric phases in antiferroelectric/ferrielectric liquid crystals Japanese Journal of Applied Physics, Part 2: Letters 35 -, 1996
View abstract

Robinson WK, Miller RJ, Gleeson HF, Hird M, Seed AJ, Styring P The influence of sulfur on phenyl propiolates for ferroelectric applications Ferroelectrics 180 291-313, 1996
View abstract

Gleeson HF, Morse AS Microsecond studies of layer motion in a ferroelectric liquid crystal device Liquid Crystals 21 755-758, 1996
View abstract

Miller RJ, Gleeson HF Lattice parameter measurements from the Kossel diagrams of the cubic liquid crystal blue phases Journal de Physique II 6 909-922, 1996
View abstract

Allinson H, Gleeson HF Variations in the elastic constants of a fulgide-doped liquid crystal system Journal of Materials Chemistry 5 2139-2144, 1995
View abstract

Gleeson HF, Carboni C, Morse AS Apparatus for simultaneous observation of the electro-optic response and small angle x-ray scattering in liquid crystals Review of Scientific Instruments 66 3563-3568, 1995
DOI:10.1063/1.1145470
View abstract

Miller RJ, Gleeson HF Order parameter measurements from the Kossel diagrams of the liquid-crystal blue phases Physical Review E 52 5011-5016, 1995
DOI:10.1103/PhysRevE.52.5011
View abstract

Robinson WK, Carboni C, Gleeson HF, Hird M, Styring P, Seed A Electro-optic and piezo-optic studies of an antiferro-ferri- ferro-electric system Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals 263 69-79, 1995
DOI:10.1080/10587259508033571
View abstract

Allinson H, Gleeson HF Dielectric permittivity properties of a fulgide dye guest-host liquid crystal Liquid Crystals 19 421-425, 1995
DOI:10.1080/02678299508032002
View abstract

Gleeson H Polymer liquid crystals: One day meeting 8 February 1995 London Liquid Crystals Today 5 5-6, 1995
DOI:10.1080/13583149508047584
View abstract

Miller RJ, Gleeson HF A computer interfaced high-stability temperature controller and heating stage for optical microscopy Measurement Science and Technology 5 904-911, 1994
DOI:10.1088/0957-0233/5/8/006
View abstract

Carboni C, Robinson WK, Gleeson HF A polarizing microscope for high-pressure studies of liquid crystals Measurement Science and Technology 4 1238-1243, 1993
DOI:10.1088/0957-0233/4/11/010
View abstract

Miller RJ, Gleeson HF The influence of pretransitional phenomena on blue phase range Liquid Crystals 14 2001-2011, 1993
DOI:10.1080/02678299308027736
View abstract

Carboni C, Gleeson HF, Goodby JW, Slaney AJ A specialized apparatus for the study of liquid crystals at high pressures Liquid Crystals 14 1991-2000, 1993
DOI:10.1080/02678299308027735
View abstract

Allinson H, Gleeson HF Physical properties of mixtures of low molar mass nematic liquid crystals with photochromic fulgide guest dyes Liquid Crystals 14 1469-1478, 1993
DOI:10.1080/02678299308026459
View abstract

Gleeson HF Ferroelectric polymer liquid crystals Ferroelectrics 133 15-20, 1992
DOI:10.1080/00150199208217971
View abstract

Coles HJ, Gleeson HF, Scherowksy G, Schliwa A Ferroelectric side chain polymer liquid crystals: I static and dynamic properties Molecular Crystals and Liquid Crystals Letters 7 117-124, 1990
DOI:10.1080/01406566.1990.10767063
View abstract

Coles HJ, Gleeson HF, Scherowsky G, Schliwa A Ferroelectric polymer liquid crystals: II the dye guest host effect Molecular Crystals and Liquid Crystals Letters 7 125-130, 1990
DOI:10.1080/01406566.1990.10767064
View abstract

Gleeson HF, Coles HJ Doped ferroelectric liquid crystal systems Ferroelectrics 92 355-, 1989
DOI:10.1080/00150198908211358

Gleeson HF, Coles HJ Dynamic properties of blue-phase mixtures Liquid Crystals 5 917-926, 1989
DOI:10.1080/02678298908026398
View abstract

Coles HJ, Gleeson HF, Kang JS Dye guest-host effects in ferroelectric liquid crystals Liquid Crystals 5 1243-1252, 1989
DOI:10.1080/02678298908026430
View abstract

Coles HJ, Bone EL, Bowdler AR, Gleeson HF A fibre-optic liquid crystal temperature switch Proceedings of SPIE - The International Society for Optical Engineering 949 185-190, 1988
DOI:10.1117/12.947533
View abstract

Coles HJ, Gleeson HF Dyed guest host ferroelectric devices: 1. A single polariser ultra fast dichroic shutter Molecular Crystals and Liquid Crystals Letters 6 53-60, 1988
DOI:10.1080/01406566.1988.10767021
View abstract

Gleeson HF, Kaur S Liquid Crystal Contact Lenses with Graphene Electrodes and Switchable Focus MRS Advances -,
DOI:10.1557/adv.2016.467
View abstract