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Jan Lagerwall
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| Faculté ou Centre | Faculté des Sciences, des Technologies et de Médecine | ||||||||
| Department | Département Physique et sciences des matériaux | ||||||||
| Adresse postale |
Campus Limpertsberg, Université du Luxembourg 162 A, avenue de la Faïencerie L-1511 Luxembourg |
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| Bureau sur le campus | BS 1.15A | ||||||||
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| Téléphone | (+352) 46 66 44 6219 | ||||||||
| Réseaux sociaux & blogs | |||||||||
| Langues parlées | English, French, German, Italian, Swedish | ||||||||
| Séjours de recherche en | Germany, Luxembourg, Sweden, South Korea, USA | ||||||||
Internationally active dynamic and innovative soft matter physicist with strong interest also in materials science, physical chemistry and—very much so—cross-disciplinary activities. The driving force is a deep fascination and enthusiasm for the scientific beauty of the field as well as the diverse application possibilities.
Experience from multiple world-class academic research & teaching environments in five countries on three continents. Long-term core expertise in liquid crystals—thermotropic and lyotropic—expanded with activities in electrospinning, microfluidics and colloids, leading modern liquid crystal science to new directions, with wearable technology and soft robotics being our main applied foci.
Active in relationship building and networking, with a record of organizing and leading international multi-expertise scientific teams.
Efficient in delivering complex information to diverse audiences thanks to enthusiasm and good skills in written and verbal communication, with support of multiple digital media as well as hands-on experiments and demonstrations.
Last updated on: mardi 11 mai 2021
Last updated on: 18 mars 2015
2022
Unclonable human-invisible machine vision markers leveraging the omnidirectional chiral Bragg diffraction of cholesteric spherical reflectors; ; ; ; ; ; ; ; ; ; ;
in Light: Science and Applications (2022), 11(309), 10103841377-022-01002-4
Robust cholesteric liquid crystal elastomer fibres for mechanochromic textiles; ;
in Nature Materials (2022), 21(12), 14411447
Birefringence-modulated total internal reflection in liquid crystal shells;
in Frontiers in Soft Matter (2022), 2(Summer), 991375
Embedding intelligence in materials for responsive built environment: A topical review on Liquid Crystal Elastomer actuators and sensors;
in Building and Environment (2022), 226
2021
Encoding Hidden Information onto Surfaces Using Polymerized Cholesteric Spherical Reflectors; ;
in Advanced Functional Materials (2021)
Measuring the Anisotropy in Interfacial Tension of Nematic Liquid Crystals; ; ;
in Crystals (2021), 11(6), 687
Topological Defect-Guided Regular Stacking of Focal Conic Domains in Hybrid-Aligned Smectic Liquid Crystal Shells;
in Crystals (2021), 11(8), 913
Quantitative volatile organic compound sensing with liquid crystal core fibers; ; ; ;
in Cell Reports Physical Science (2021), 2(12), 100661
Linking Physical Objects to Their Digital Twins via Fiducial Markers Designed for Invisibility to Humans; ; ; ; ; ;
in Multifunctional Materials (2021), 4(2), 022002
Liquid crystal elastomer shells with topological defect-defined actuation: Complex shape morphing, opening/closing, and unidirectional rotation; ;
in Journal of Applied Physics (2021), 129(17), 174701
Electrospinning Ethanol–Water Solutions of Poly(Acrylic Acid): Nonlinear Viscosity Variations and Dynamic Taylor Cone Behavior;
in Macromolecular Materials and Engineering (2021)
Stable Electrospinning of Core-Functionalized Coaxial Fibers Enabled by the Minimum-Energy Interface Given by Partial Core− Sheath Miscibility; ;
in Langmuir (2021), 37(45), 1326513277
2020
Responsive Photonic Liquid Marbles; ; ; ;
in Angewandte Chemie International Edition (2020), 59(43), 19260--19267
Interrogating helical nanorod self-assembly with fractionated cellulose nanocrystal suspensions;
in Communications Materials (2020), 1
High-contrast imaging of 180 degrees ferroelectric domains by optical microscopy using ferroelectric liquid crystals; ; ; ; ;
in APPLIED PHYSICS LETTERS (2020), 116(21),
Dynamic tuning of the director field in liquid crystal shells using block copolymers; ; ; ; ;
in Physical Review Research (2020), 2(3), 033160
Disruption of Electrospinning due to Water Condensation into the Taylor Cone.;
in ACS Applied Materials and Interfaces (2020), 12(23), 26566--26576
From Equilibrium Liquid Crystal Formation and Kinetic Arrest to Photonic Bandgap Films Using Suspensions of Cellulose Nanocrystals; ; ; ; ;
in Crystals (2020), 10(3), 199
2019
Elastic sheath–liquid crystal core fibres achieved by microfluidic wet spinning; ; ;
in Journal of Materials Chemistry C (2019)
Microfluidic Wet Spinning of Core-Sheath Elastomer-Liquid Crystal Fibers; ; ;
Scientific Conference (2019, March 29)
Liquid crystal elastomer shell actuators with negative order parameter; ; ; ; ;
in Science Advances (2019), 5(4), 1
Facile Anisotropic Deswelling Method for Realizing Large‐Area Cholesteric Liquid Crystal Elastomers with Uniform Structural Color and Broad‐Range Mechanochromic Response; ; ; ; ;
in Advanced Functional Materials (2019)
Isotropic–isotropic phase separation and spinodal decomposition in liquid crystal–solvent mixtures; ; ;
in Soft Matter (2019), 15
Realignment of Liquid Crystal Shells Driven by Temperature- Dependent Surfactant Solubility; ;
in Langmuir (2019), 35(2019), 1113211140
2018
Fractionation of cellulose nanocrystals enhances liquid crystal ordering without promoting gelation; ; ; ; ; ;
in Abstracts of Papers of the American Chemical Society (2018), 256
Fractionation of cellulose nanocrystals: enhancing liquid crystal ordering without promoting gelation; ; ; ; ; ;
in NPG asia materials (2018)
Micrometer-Scale Porous Buckling Shell Actuators Based on Liquid Crystal Networks; ; ; ; ;
in Advanced Functional Materials (2018), 28(31), 1801209
Sub-second dynamic phototuning of alignment in azodendrimer-doped nematic liquid crystal shells; ; ; ; ;
in Journal of Molecular Liquids (2018), 267
Advancing flexible volatile compound sensors using liquid crystals encapsulated in polymer fibers;
in Proceedings of SPIE : The International Society for Optical Engineering (2018, February 08), 10555(105550O),
Cholesteric Liquid Crystal Shells as Enabling Material for Information-Rich Design and Architecture.; ; ; ; ;
in Advanced Materials (2018)
Influence of head group and chain length of surfactants used for stabilising liquid crystal shells;
in Liquid Crystals (2018), 45(13-15), 2319-2328
2017
Through the Spherical Looking-Glass: Asymmetry Enables Multicolored Internal Reflection in Cholesteric Liquid Crystal Shells; ; ; ; ;
in Advanced Optical Materials (2017), 6(1), 1700923
Elucidating the fine details of cholesteric liquid crystal shell reflection patterns; ; ; ;
in Liquid Crystals (2017), 44(12-13),
Security in the Shell : An Optical Physical Unclonable Function made of Shells of Cholesteric Liquid Crystals; ; ; ; ; ;
in Proc. of the 9th IEEE Workshop on Information Forensics and Security (2017, October 02)
Why organically functionalized nanoparticles increase the electrical conductivity of nematic liquid crystal dispersions;
in Journal of Materials Chemistry C (2017), 5(34), 8802-8809
Liquid crystals in micron-scale droplets, shells and fibers; ; ; ; ; ;
in Journal of Physics : Condensed Matter (2017), 29
2016
Enhancing Self-Assembly in Cellulose Nanocrystal Suspensions Using High-Permittivity Solvents; ; ; ;
in Langmuir (2016)
High-fidelity spherical cholesteric liquid crystal Bragg reflectors generating unclonable patterns for secure authentication; ; ; ; ;
in Scientific Reports (2016), 6(26840), 1-8
Transmission polarized optical microscopy of short-pitch cholesteric liquid crystal shells; ;
in Proceedings of SPIE - The International Society for Optical Engineering (2016, March 07), 9769
Equilibrium Liquid Crystal Phase Diagrams and Detection of Kinetic Arrest in Cellulose Nanocrystal Suspensions; ; ; ; ;
in Frontiers in Materials (2016), 3
Correlation between structural properties and iridescent colors of cellulose nanocrystalline films; ; ; ; ; ;
in Cellulose (2016)
Taming Liquid Crystal Self-Assembly: The Multifaceted Response of Nematic and Smectic Shells to Polymerization.; ;
in Advanced Materials (2016)
Nanoparticles dispersed in liquid crystals: impact on conductivity, low-frequency relaxation and electro-optical performance;
in Journal of Materials Chemistry C (2016), 4(16), 3485-3491
2015
Multifunctional responsive fibers produced by dual liquid crystal core electrospinning; ;
in Journal of Materials Chemistry C (2015), 3
Dynamic and complex optical patterns from colloids of cholesteric liquid crystal droplets; ; ;
in Proceedings of the SPIE (2015), 9384
Influence of interface stabilisers and surrounding aqueous phases on nematic liquid crystal shells; ;
in Soft Matter (2015), in press
Ultra-long ordered nanowires from the concerted self-assembly of discotic liquid crystal and solvent molecules.; ; ; ;
in Langmuir (2015), 31(34), 9432-9440
Rod packing in chiral nematic cellulose nanocrystal dispersions studied by small angle X-ray scattering and laser diffraction; ; ; ; ; ; ; ; ;
in Langmuir (2015), 31(23), 6507-6513
2014
Influence of Wetting on Morphology and Core Content in Electrospun Core-Sheath Fibers;
in ACS Applied Materials and Interfaces (2014), 6(18), 16441-16447
Cellulose nanocrystal-based materials: from liquid crystal self-assembly and glass formation to multifunctional thin films; ; ; ; ; ;
in NPG Asia Materials (2014), 6(1), 80
Tuneable Multicoloured Patterns From Photonic Cross Communication Between Cholesteric Liquid Crystal Droplets; ; ;
in Journal of Materials Chemistry C (2014), 2(5), 806-810
Macroscopic control of helix orientation in films dried from cholesteric liquid crystalline cellulose nanocrystal suspensions
; ; ; ; ; ;
in Chemphyschem : A European Journal of Chemical Physics and Physical Chemistry (2014), 15(7), 1477-1484
2013
Liquid crystal-functionalization of electrospun polymer fibers; ;
in Journal of Polymer Science. Part B, Polymer Physics (2013), 51(11), 855-867
Tuning the defect configurations in nematic and smectic liquid crystalline shells.; ; ; ;
in Philosophical Transactions of the Royal Society of London. Series A : Mathematical and Physical Sciences (2013), 371(1988), 20120258
Morphology and Core Continuity of Liquid-crystal-functionalized, Coaxially Electrospun Fiber Mats Tuned Via the Polymer Sheath Solution; ; ; ; ; ;
in Macromolecular Materials and Engineering (2013), 298(5), 583-589
2012
Utilizing the Krafft phenomenon to generate ideal micelle-free surfactant-stabilized nanoparticle suspensions; ; ; ; ;
in Angewandte Chemie International Edition (2012), 51(13), 3254-3257
One-piece micropumps from liquid crystalline core-shell particles; ; ; ; ;
in Nature Communications (2012), 3
A New Era for Liquid Crystal Research: Applications of Liquid Crystals in Soft Matter Nano-, Bio- and Microtechnology;
in Current Applied Physics (2012), 12(6), 1387-1412
Towards tunable defect arrangements in smectic liquid crystal shells utilizing the nematic-smectic transition in hybrid-aligned geometries; ; ;
in Soft Matter (2012), 8(20), 5443-5450
2011
Liquid Crystals in Novel Geometries prepared by Microfluidics and Electrospinning; ; ;
in Molecular Crystals and Liquid Crystals (2011), 549
Nematic-smectic transition under confinement in liquid crystalline colloidal shells; ; ;
in Physical Review Letters (2011), 106(24), 247801
Effects of chain branching and chirality on liquid crystalline phases of bent-core molecules: blue phases, de Vries transitions and switching of diastereomeric states; ; ; ; ;
in Soft Matter (2011), 7(18), 8266-8280
Filament formation in carbon nanotube-doped lyotropic liquid crystals; ; ;
in Soft Matter (2011), 7(6), 2663-2667
2010
Electrospun Microfibres With Temperature Sensitive Iridescence From Encapsulated Cholesteric Liquid Crystal;
in Journal of Materials Chemistry (2010), 20(33), 6866-6872
Tailor-designed polyphilic promotors for stabilizing dispersions of carbon nanotubes in liquid crystals; ;
in Chemical Communications (2010), (46), 6989-6991
Complex chirality at the nanoscale;
in Chemphyschem : A European Journal of Chemical Physics and Physical Chemistry (2010), 11(5), 975-977
Self-assembled ordered structures in thin films of HAT5 discotic liquid crystal; ; ; ;
in Beilstein Journal of Organic Chemistry (2010), 6(51), 103762651
Towards efficient dispersion of carbon nanotubes in thermotropic liquid crystals; ; ; ; ; ; ; ; ;
in Advanced Functional Materials (2010), 20(19), 3350-3357
2009
Electrolyte effects on the stability of nematic and lamellar lyotropic liquid crystal phases – colligative and ion-specific aspects; ;
in Journal of Physical Chemistry B (2009), 113(33), 11414-11420
Coaxial Electrospinning of Liquid Crystal-containing Poly(vinyl Pyrrolidone) Microfibers; ;
in Beilstein Journal of Organic Chemistry (2009), 5(58), 103762558
On the balance between syn- and anticlinicity in smectic phases formed by achiral hockey-stick mesogens with and without chiral dopants; ; ; ; ; ;
in Journal of Materials Chemistry (2009), 19(19), 2950-2957
Macroscopic-scale carbon nanotube alignment via self-assembly in lyotropic liquid crystals; ; ; ;
in Synthetic Metals (2009), 159(21-22), 2177-2179
2008
Coaxial Electrospinning of Microfibres With Liquid Crystal in the Core; ; ; ;
in Chemical Communications (2008), 42
Spontaneous macroscopic carbon nanotube alignment via colloidal suspension in hexagonal columnar lyotropic liquid crystals; ; ; ; ;
in Soft Matter (2008), 4(3), 570-576
2007
Molecular model for de Vries type smectic-A–smectic-C phase transition in liquid crystals; ; ; ;
in Physical Review. E ,Statistical, Nonlinear, and Soft Matter Physics (2007), 75(6), 060701
Order-disorder molecular model of the smectic-A-smectic-C phase transition in materials with conventional and anomalously weak layer contraction; ; ;
in Physical Review. E ,Statistical, Nonlinear, and Soft Matter Physics (2007), 76(5), 051706
Antiferroelectric liquid crystals with induced intermediate polar phases and the effects of doping with carbon nanotubes; ;
in Journal of Non-Crystalline Solids (2007), 353(47-51), 4411-4417
Nanotube alignment using lyotropic liquid crystals; ; ; ; ;
in Advanced Materials (2007), 19(3), 359-364
Partitioning and reorientational dynamics of phenylalcohols in SDS lyotropic liquid crystalline mesophases: An alc-μsr study; ; ; ; ;
in Colloids and Surfaces A : Physicochemical and Engineering Aspects (2007), 309
Carbon nanotubes in liquid crystals as versatile functional materials; ; ; ; ;
in Physica Status Solidi B. Basic Research (2007), 244(11), 4212-4217
2006
The peculiar optic, dielectric and x-ray diffraction properties of a fluorinated de vries asymmetric-diffuse-cone-model ferroelectric liquid crystal; ; ; ; ; ; ; ;
in Liquid Crystals (2006), 33(1), 17-24
Current topics in smectic liquid crystal research;
in Chemphyschem : A European Journal of Chemical Physics and Physical Chemistry (2006), 7(1), 20-45
On the change in helix handedness at transitions between the sm-c* and sm-ca* phases in chiral smectic liquid crystals; ;
in Liquid Crystals (2006), 33(6), 625-633
Simultaneous alignment and dispersion of carbon nanotubes with lyotropic liquid crystals; ; ; ; ;
in Physica Status Solidi B. Basic Research (2006), 243(13), 3046-3049
Effect of phenyl rings in liquid crystal molecules on swcnts studied by raman spectroscopy; ; ; ; ;
in Physica Status Solidi B. Basic Research (2006), 243(13), 3238-3241
2005
Demonstration of the antiferroelectric aspect of the helical superstructures in SmC*, SmC$_α$* and SmC$_a$* liquid crystalsin Physical Review. E ,Statistical, Nonlinear, and Soft Matter Physics (2005), 71(5), 051703
Chiral smectic C subphases induced by mixing a bistereogenic antiferroelectric liquid crystal with a non-chiral liquid crystal; ; ; ; ;
in Ferroelectrics (2005), 315
Generation of frustrated liquid crystal phases by mixing an achiral n–smc mesogen with an antiferroelectric chiral smectic liquid crystal; ; ; ;
in Journal of Chemical Physics (2005), 122(14), 144906
Frustration between syn- and anticlinicity in mixtures of chiral and non-chiral tilted smectic-c-type liquid crystals; ;
in European Physical Journal E. Soft Matter (2005), 18(1), 113-121
A study of a bistereogenic mesogen for the development of orthoconic antiferroelectric liquid crystal materials; ; ;
in Ferroelectrics (2005), 315
Electrolyte effects on the nematic-isotropic phase transition in lyotropic liquid crystals; ;
in Liquid Crystals (2005), 32(10), 1301-1306
Differences between smectic homo- and copolysiloxanes as a consequence of microphase separation; ; ; ; ; ;
in Liquid Crystals (2005), 32(5), 533-538
2004
On the origin of high optical director tilt in a partially fluorinated orthoconic antiferroelectric liquid crystal; ; ;
in Liquid Crystals (2004), 31(9), 1175-1184
A chameleon chiral polar liquid crystal: Rod-shaped when nematic, bent-shaped when smectic; ; ;
in Chemistry of Materials (2004), 16(19), 3606-3615
Polarity-directed analog electrooptic switching in a low-polarization chiral smectic liquid crystal with positive dielectric anisotropy; ; ;
in Physical Review. E ,Statistical, Nonlinear, and Soft Matter Physics (2004), 70(3), 031703
Ferroelectric polysiloxane liquid crystals with ‘de vries’-type smectic a* -smectic c* transitions; ; ;
in Liquid Crystals (2004), 31(6), 883-887
(-)-isopinocampheol substituted mesogens: An investigation of the effect of bulky terminal groups in chiral smectic liquid crystals; ; ; ;
in Ferroelectrics (2004), 311
2003
On the phase sequence of antiferroelectric liquid crystals and its relation to orientational and translational order; ; ;
in Liquid Crystals (2003), 30(4), 399-414
2002
Antiferroelectric liquid crystal mixture without smectic layer shrinkage at the direct sma* - smca* transition; ; ;
in Physical Review. E ,Statistical, Nonlinear, and Soft Matter Physics (2002), 66(5), 051704
Optical and x-ray evidence of the de vries sm-A*-sm-C* transition in a non-layer shrinkage ferroelectric liquid crystal with very weak interlayer tilt correlation; ;
in Physical Review. E. (2002), 66(3), 031703
Phases, phase transitions and confinement effects in a series of antiferroelectric liquid crystals; ; ; ;
in Liquid Crystals (2002), 29(2), 163-178
Surface- and field-induced AFLC structures detected by dielectric spectroscopy; ; ;
in Ferroelectrics (2002)
Tilt plane orientation in antiferroelectric liquid crystal cells and the origin of the pretransitional effect; ; ; ;
in Physical Review. E ,Statistical, Nonlinear, and Soft Matter Physics (2002), 66(6), 061708
2000
Electrooptic and dielectric properties of new antiferroelectric liquid crystal mixtures; ; ; ; ; ; ; ; ;
in Ferroelectrics (2000), 244
Antiferroelectric liquid crystals with 45° tilt - a new class of promising electro-optic materials; ; ; ; ; ; ; ;
in Ferroelectrics (2000), 244
Dielectric investigations of a chiral monomer and side chain polymer; ; ; ; ; ; ;
in Molecular Crystals and Liquid Crystals (2000), 352
Optic, electrooptic and dielectric properties of novel antiferroelectric liquid crystal compounds; ; ; ; ; ; ; ; ;
in Ferroelectrics (2000)
On the coexistence of SmC* and SmCa* phases in binary chiral-dopant antiferroelectric mixtures; ; ; ;
in Ferroelectrics (2000), 244
1999
The dependence on the helical pitch of the antiferroelectric dielectric modes; ; ; ; ;
in Ferroelectrics (1999), 244
Electrooptic and dielectric spectroscopy measurements of binary chiral-dopant antiferroelectric mixtures; ;
in Molecular Crystals and Liquid Crystals (1999), 351
The case of thresholdless antiferroelectricity: Polarization-stabilized twisted SmC* liquid crystals give V-shaped electro-optic response; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
in Journal of Materials Chemistry (1999), 9(6), 1257-1261
