�鶹��ѡ

CAREER

• Director, Advanced Materials and Liquid Crystal Institute (AMLCI), since 07/2019
• Associate Director, Advanced Materials and Liquid Crystal Institute (AMLCI), 09/2018 - 06/2019
• Interim Associate Director, LCI, 12/2017 - 08/2018
• Full Professor, �鶹��ѡ, since 2015
• Fellow, Royal Society of Chemistry (FRSC), since 2016
• CSO - Torel LLC
• Associate Professor & Ohio Research Scholar in Science and Technology of Advanced Nanomaterials, Liquid Crystal Institute, Kent State, 2011-2015
• Interim Director Regenerative Medicine Initiative at KSU, ReMedIKS, Kent State, 2012-2015
• Adjunct Associate Professor, University of Manitoba, Department of Chemistry & Department of Pharmacology and Therapeutic, 2011-2015
• Associate Professor, University of Manitoba (Canada), Chemistry, 2008-2011
• Assistant Professor, University of Manitoba (Canada), Chemistry, 2003-2008

Select Opportunities

• Summer 2024 REU Project: "Chiral Nanoparticles in Liquid Crystal Phases"

PUBLICATIONS

• A. Gowda, G. Acherjee, S. K. Pathak, G. A. R. Rohaley, A. Shah, R. P. Lemieux, M. E. Prévôt, T. Hegmann, Mater. Horizons 2024, 11, 5550-5563. “Controlling nano- and microfilament morphology by strategically placing chiral centers in the side chains of bent-core molecules” Front Cover
• D. Samra-Shevy, B. Kateb, D. F. Moore, V. Yathindranath, T. Hegmann, D. Miller, M. Pelletier, R. Schiffman, “Directed drug convection using magnetic nanoparticles as therapeutic carriers meeting the challenge of specific brain pharmacotherapeutics, non-ligand based central nervous system targeting, including magnetic focusing”, in The Textbook of Nanoneuroscience and Nanoneurosurgery - 2nd Edition, Eds. B. Kateb, D. D. Heiss, J. S. Yu, M. Hsieh, Springer-Nature, Ch. 11, 165-181 (2024).
• G. A. R. Rohaley,  T. Hegmann, Nature Mater. 2024, 23, 1161-1163. “Let’s twist again”
• A. Gowda, S. K. Pathak, G. A. R. Rohaley, G. Acherjee, A. Oprandi, R. Williams, M. E. Prévôt, T. Hegmann, Mater. Horizons 2024, 11, 316-340. "Organic chiral nano- and microfilaments: types, formation, and template applications" Front Cover
• B. Sezgin, J. Liu, D. P. N. Gonçalves, C. Zhu, T. Tilki, M. E. Prévôt, T. Hegmann, ACS Nanoscience Au 2023, 3, 295-309. “Controlling structure and morphology of organic nanofilaments using external stimuli” Front Cover
• D. P. N. Gonçalves, T. Ogolla, T. Hegmann, ChemPhysChem 2023, 24, e202200685. “Chirality transfer from an innately chiral nanocrystal core to a nematic liquid crystal 2: Lyotropic chromonic liquid crystals” Cover Feature
• N. Shen, J. Bu, M. E. Prévôt, T. Hegmann, J. P. Kennedy, W. Xu, Macromol. Rapd. Commun. 2023, 44, 2200109. “Macromolecular engineering and additive manufacturing of poly(styrene-b-isobutylene-b-styrene) SIBS II” 
• B. Sezgin, T. Hegmann, J. Mater. Chem. C 2022, 10, 18120-18126. “Azobenzene-decorated cellulose nanocrystals as photo-switchable chiral solutes in nematic liquid crystals” Featured on the Cover
• A. Poryvai, M. Šmahel, M. Švecová, A. Nemati, S. Shadpour, P. Ulbrich, T. Ogolla, J. Liu, V. Novotná, M. Veverka, J. Vejpravová, T. Hegmann, M. Kohout, ACS Nano 2022, 16, 11833-11841. “Chiral, magnetic and photosensitive liquid crystalline nanocomposites based on multifunctional nanoparticles and achiral liquid crystals” 
• A. Sharma, T. Mori, A. Nemati, D. P. N. Gonçalves, L. Querciagrossa, C. Zannoni, T. Hegmann, Mater. Adv. 2022, 3, 3346-3354. “The significance of nanoparticle shape in chirality transfer to a surrounding nematic liquid crystal reporter medium” Popular Advances Collection 2022 + Featured on the Back Cover
• J. Liu, Y. Molard, M. E. Prévôt, T. Hegmann, ACS Appl. Mater. Interfaces 2022, 14, 29398-29411. “Highly tunable circularly polarized emission of an aggregation-induced emission dye using helical nano- and microfilaments as supramolecular chiral templates” 
• A. Nemati, L. Querciagrossa, C. Callison, S. Shadpour, D. P. N. Gonçalves, T. Mori, X. Cui, R. Ai, J. Wang, C. Zannoni, T. Hegmann, Sci. Adv. 2022, 8, eabl4385. “Effects of shape and solute-solvent compatibility on the efficacy of chirality transfer: nanoshapes in nematics”
• D. P. N. Gonçalves, T. Hegmann, Angew. Chem. Int. Ed. 2021, 60, 17344-17349; Angew. Chem. 2021, 133, 17484-17489. “Chirality transfer from an innately chiral nanocrystal core to a nematic liquid crystal: Surface‐modified cellulose nanocrystals” Hot Paper + Featured on the Inside Front Cover 
• J. Liu, S. Shadpour, A. Nemati, M. E. Prévôt, E. Hegmann, C. Zhu, T. Hegmann, Liq. Cryst. 2021, 48, 1129-1139.. “Binary mixtures of bent-core molecules forming distinct types of B4 phase nano- and microfilament”
• D. N. P. Gonçalves, M. E. Prèvôt, S. Ustunel, T. Ogolla, A. Nemati, S. Shadoour, T. Hegmann, Liq. Cryst. Rev. 2021, 9, 1-34, “Recent progress at the interface between nanomaterial chirality and liquid crystals”
• J. Liu, S. Shadpour, M. E. Prévôt, M. Chirgwin, A. Nemati, E. Hegmann, R. P. Lemieux, T. Hegmann, ACS Nano 2021, 15, 7249-7270. “Molecular conformation of bent-core molecules affected by chiral side chains dictates polymorphism and chirality in organic nano- and microfilaments”
• K. Perera, A. Nemati, E. Mann, T. Hegmann, A. Jákli, ACS Appl. Mater. Interfaces 2021, 13, 4574-4582. “Converging microlens array using nematic liquid crystals doped with chiral nanoparticles” Featured on the Cover
• S. Ustunel, M. E. Prévôt, G. R. Rohaley, C. Webb, B. Yavitt, G. Freychet, M. Zhernenkov, R. Pindak, C. Zhu, E. Schaible, T. Hegmann, R. J. Clements, E. Hegmann, Mater. Adv. 2021, 2, 464-476. “Mechanically tunable elastomer and cellulose nanocrystal composites as scaffolds for in vitro cell studies”
• K. Perera, A. Nemati, E. Mann, T. Hegmann, A. Jákli, Proc. SPIE 2020, 11472, 114720O. “Optical properties of nematic microlenses doped with chiral nanoparticles”
• M. E. Prévôt, A. Nemati, T. R. Cull, E. Hegmann, T. Hegmann, Adv. Mater. Technol. 2020, 5, 2000058. “A zero-power, optical ppt- to ppm-level toxic gas and vapor sensor with image, text and analytical capabilities” Featured on the Inside Back Cover
• S. Shadpour, A. Nemati, J. Liu, T. Hegmann, ACS Appl. Mater. Interfaces 2020, 12, 13456-13463. “Directing the handedness of helical nanofilaments confined in nanochannels using axially chiral binaphthyl dopants”
• S. Shadpour, A. Nemati, M. Salamończyk, M. E. Prévôt, J. Liu, N. J. Boyd, M. R. Wilson, C. Zhu, E. Hegmann, A. I. Jákli, T. Hegmann, Small 2020, 16, 1905591. “Missing link between helical nano- and microfilaments in B4 phase bent-core liquid crystals, and deciphering which chiral center controls the filament handedness”
• M. E. Prévôt, J. P. Vanegas, J. Pérez-Prieto, Y. Molard, E. Hegmann, T. Hegmann, “Emissive Nanomaterials and liquid crystals”, in 21. Century Nanoscience - A Handbook, Ed. K. D. Sattler, Taylor & Francis, 2020, vol. 5, Ch.6, 27-76.
• A. Nemati, S. Shadpour, L. Querciagrossa, T. Mori, C. Zannoni, T. Hegmann, ACS Nano 2019, 13, 10312-10326. “Highly sensitive, tunable chirality amplification through space visualized for gold nanorods capped with axially chiral binaphthyl derivatives”
• M. T. Murachver, A. Nemati, M. Salamończyk, C. Bullock, Z. Sabata, H. Rahmani, T. Vorobiova, A. Izadnegahdar, S. M. Salili, V. Norman, C. Zhu, T. Hegmann, S. N. Sprunt, J. T. Gleeson, A. I. Jákli, Soft Matter 2019, 15, 3283-8290. “Indication of a Twist-Grain-Boundary-Twist-Bend Phase of flexible core bent-shape chiral dimers”
• S. Shadpour, A. Nemati, N. J. Boyd, L. Li, M. E. Prévôt, S. L. Wakerlin, J. P. Vanegas, M. Salamończyk, E. Hegmann, C. Zhu, M. R. Wilson, A. I. Jákli, T. Hegmann, Mater. Horizons 2019, 6, 959-968. “Heliconical-layered nanocylinders (HLNCs) – hierarchical self-assembly in a unique B4 phase liquid crystal morphology” Featured on the Journal Cover
• S. Shadpour, J. P. Vanegas, A. Nemati, T. Hegmann, ACS Omega 2019, 4, 1662-1668. “Amplification of chirality by adenosine monophosphate-capped luminescent gold nanoclusters in nematic lyotropic chromonic liquid crystal tactoids”
• A. Nemati, S. Shadpour, L. Querciagrossa, L. Li, T. Mori, M. Gao, C. Zannoni, T. Hegmann, Nat. Commun. 2018, 9, 3908. “Chirality amplification by desymmetrization of chiral ligand-capped nanoparticles to nanorods quantified in soft condensed matter”
• N. Beals, M. Model, M. Worden, T. Hegmann, S. Basu, ACS Appl. Mater. Interfaces 2018, 10, 6869-6878. “Intermolecular G-quadruplex induces hyaluronic acid-DNA superpolymers causing cancer cell swelling, blebbing and death”
• M. Reznikov, D. Andrienko, V.N. Boychuk, A. Bubnov, L. Dolgov, I. Dozov, P. Davidson, A. Gabovich, T. Hegmann, I. Ilchishin, R. Karapinar, P. Korniychuk, D. Stepanchikov, O. Tkachenko, Y. Kurioz, M. Manevich, A.M. Negriyko, J. Parka, V. Pergamenshchik, C. Rosenblatt, K. Singer, I. Terenetskaya, V. Vashchenko, M. Vasnetsov, M. Soskin, T. Wolinski, O.V. Yaroshchuk, J. Mol. Liq. 2018, 267, 11-28. “Recollections of Professor Yuriy Reznikov” - “Personal views and the beginnings of nanoparticle dispersions in liquid crystals”
• J. Wang, L. Bergquist, J.-I. Hwang, K.-J. Kim, J.-H. Lee, T. Hegmann, A. Jákli, Liq. Cryst. 2018, 45, 333-340. “Wide temperature-range, multi-component, optically isotropic antiferroelectric bent-core liquid crystal mixtures for display applications”
• L. Li, M. Salamonczyk, S. Shadpour, C. Zhu, A. Jákli, T. Hegmann, Nat. Commun. 2018, 9, 714. “An unusual type of polymorphism in a liquid crystal”
• L. Bergquist, T. Hegmann, ChemNanoMat 2017, 3, 863-868. “Chiral amplification by L-cysteine-capped gold nanoparticles in lyotropic chromonic liquid crystals”  and Featured on the Journal Cover
• T. Mori, A. Sharma, A. Nemati, L. Bergquist, T. Hegmann, Proc. SPIE 2017, 10361, 103610M. “Effects of size and ligand density on the chirality transfer from chiral ligand-capped nanoparticles to nematic liquid crystals”
• B. Atorf, T. Funck, T. Hegmann, S. Kempter, T. Liedl, K. Martens, H. Mühlenbernd, T. Zentgraf, B. Zhang, H. Kitzerow, M. Urbanski, Liq. Cryst. 2017, 44, 1929-1947. “Liquid crystals and precious metal: From nanoparticle dispersions to functional plasmonic nanostructures”
• S. M. Salili, M. Worden, A. Nemati, D. W. Miller, T. Hegmann, Nanomaterials 2017, 7, 211. “Synthesis of distinct iron oxide nanomaterial shapes using lyotropic liquid crystal solvents”
• B. Rožič, J. Fresnais, C. Molinaro, J. Calixte, S. Umadevi, S. Lau-Truong, N. Félidj, T. Kraus, F. Charra, V. Dupuis, T. Hegmann, C. Fiorini-Debuisschert, B. Gallas, E. Lacaze, ACS Nano 2017, 11, 6728-6738. “Oriented gold nanorods and gold nanorod chains within smectic liquid crystal topological defects”
• L. Bergquist, C. Zhang, R.R. Ribeiro de Almeida, B. Pellegrene, M. Salamonczyk, M. Kim, J.-I. Hwang, K.-J. Kim, J.-H. Lee, A. Jákli, T. Hegmann, ChemOpen 2017, 6, 196-200. “An optically isotropic antiferroelectric liquid crystal (OI-AFLC) display mode operating over a wide temperature range using ternary bent-core liquid crystal mixtures” Featured on the Journal Cover
• A. Sharma, T. Mori,  C. J. Mahnen, H. R. Everson, M. T. Leslie, A. d. Nielsen, L. Lussier, C. Zhu, C. Malcuit, T. Hegmann, J. A. McDonough, E. J. Freeman, L. T. J. Korley, R. J. Clements, E. Hegmann, Macromol. Biosci. 2017, 17, 1600278. “Effects of structural variations on the cellular response and mechanical properties in biocompatible, biodegradable, and porous smectic liquid crystal elastomers” Most accessed in 11/2016
• T. Mori, T. Hegmann, J. Nanopart. Res. 2016, 18, 295. “A Practical Guide to Calculate the Number of Atoms and Overall Composition of Metal Nanoparticles using Geometric Considerations”
• Z. Sun, M. Worden, Y. Wroczynskyj, J. A. Thliveris, J. van Lierop, T. Hegmann, D. W. Miller, J. Mater. Chem. B 2016, 4, 5913-5920. “Differential internalization of brick shaped iron oxide nanoparticles by endothelial cells”
• A. Sharma, M. Urbanski, T. Mori, H.-S. Kitzerow, T. Hegmann, Metallic and semiconducting nanoparticles in liquid crystals, In Particles in Liquid Crystals, Eds. J. Lagerwall, G. Scalia, World Scientific Publ., Ch. 14, 497-535 (2016)
• L. Li, M. Salamonczyk, A. Jákli, T. Hegmann, Small 2016, 12, 3944-3955. “A dual modulated homochiral helical nanofilament phase with local columnar ordering formed by bent core liquid crystals: Effects of molecular chirality” - Selected as VIP Paper,
• Z. Sun, M. Worden, J. A. Thliveris, S. Hombach-Klonisch, T. Klonisch, J. van Lierop, T. Hegmann, D. W. Miller, Nanomed. Nanotech. Biol. Med. 2016, 12, 1775-1784. “Biodistribution of negatively charged iron oxide nanoparticles (IONPs) in mice and enhanced brain delivery using lysophosphatidic acid (LPA)”
• A. Sharma, D. Hofmann, T. Hegmann, Liq. Cryst. 2016, 43, 828-838. “Patterned alignment of nematic liquid crystals generated by ink-jet printing of gold nanoparticles and emissive carbon dots on both flexible polymer and rigid glass substrates”
• R. K. Shukla, A. Sharma, T. Mori, T. Hegmann, W. Haase, Liq. Cryst. 2016, 43, 861. Addendum to: “Effect of two different size chiral ligand-capped gold nanoparticle dopants on the electrooptic and dielectric dynamics of a ferroelectric liquid crystal mixture” 
• R. K. Shukla, A. Sharma, T. Mori, T. Hegmann, W. Haase, Liq. Cryst. 2016, 43, 695-703. “Effect of two different size chiral ligand-capped gold nanoparticle dopants on the electrooptic and dielectric dynamics of a ferroelectric liquid crystal mixture”
• T. Mori, A. Sharma, T. Hegmann, ACS Nano 2016, 10, 1552-1564. “Significant enhancement of the chiral correlation lengths in nematic liquid crystals by gold nanoparticle surfaces featuring axially chiral binaphthyl ligands” 
• M. Urbanski, J. Mirzaei, A. Sharma, D. Hofmann, H.-S. Kitzerow, T. Hegmann, Liq. Cryst. 2016, 43, 183-194. “Chemically and thermally stable, emissive carbon dots as viable alternatives to semiconductor quantum dots for emissive nematic liquid crystal–nanoparticle mixtures with lower threshold voltage”
• A. Labeeb, H. F. Gleeson, T. Hegmann, Appl. Phys. Lett. 2015, 107, 232903. “Polymer stabilization of the smectic C-alpha* liquid crystal phase – over tenfold thermal stabilization by confining networks of photo-polymerized reactive mesogens” 
• M. Worden, L. Bergquist, T. Hegmann, RSC Advances 2015, 5, 100384-100389. “A quick and easy synthesis of fluorescent iron oxide nanoparticles featuring a luminescent carbonaceous coating via in situ pyrolysis of organosilane ligands”
• M. Worden, M. A. Bruckman, M.-H. Kim, N. F. Steinmetz, J. M. Kikkawa, C. LaSpina, T. Hegmann, J. Mater. Chem. B 2015, 3, 6877-6884. “Aqueous synthesis of polyhedral “brick-like” iron oxide nanoparticles for hyperthermia and T2 MRI contrast enhancement” -
• B. M. Yao, Y. S. Gui, M. Worden, T. Hegmann, M. Xing, X. S. Chen, W. Lu, Y. Wroczynskyj, J. van Lierop, C.-M. Hu, Appl. Phys. Lett. 2015, 106, 142406. “Quantifying complex permittivity and permeability of magnetic nanoparticles” 
• R. K. Shukla, J. Mirzaei, A. Sharma, D. Hofmann, T. Hegmann, W. Haase, RSC Advances 2015, 5, 34491-34496. “Electro-optic and dielectric properties of a ferroelectric liquid crystal doped with chemically and thermally stable, emissive carbon dots”
• T. Bera, E. J. Freeman, J. A. McDonough, R. J. Clements, C. Malcuit, T. Hegmann, E. Hegmann, ACS Appl. Mater. Interfaces 2015, 7, 14528-14535. “Liquid crystal elastomer microspheres as 3D cell scaffolds supporting the attachment and proliferation of myoblasts”
• A. Sharma, A. Neshat, C. J. Mahnen, A. d. Nielsen, J. Snyder, T. L. Stankovich, B. G. Daum, E. M. LaSpina, G. Beltrano, S. Li, B.-W. Park, R. J. Clements, E. J. Freeman, C. Malcuit, J. A. McDonough, L. T. J. Korley, T. Hegmann, E. Hegmann, Macromol. Biosci. 2015, 15, 200-214. “Biocompatible, biodegradable and porous liquid crystal elastomer scaffolds for spatial cell cultures”, Most accessed in 10/2014,
• X. Feng, L. Sosa-Vargas, S. Umadevi, T. Mori, Y. Shimizu, T. Hegmann, Adv. Funct. Mater. 2015, 25, 1180-1192. “Discotic liquid crystal functionalized gold nanorods: 2- and 3D self-assembly plus macroscopic alignment and increased charge carrier mobility in hexagonal columnar liquid crystal hosts affected by molecular packing and π-π interactions”
• S. Umadevi, G. Venkatchalam, T. Hegmann, “Nanoparticles: Additives and building blocks for liquid crystal phases”, in Handbook of Liquid Crystals - 2nd Edition, Eds. J. W. Goodby et al., Wiley-VCH, Vol. 6, Ch. 2, 27-76 (2014)
• A. Sharma, T. Mori, H.-C. Lee, M. Worden, E. Bidwell, T. Hegmann, ACS Nano 2014, 8, 11966-11976. “Detecting, visualizing, and measuring gold nanoparticle chirality using helical pitch measurements in nematic liquid crystal phases”
• K.-S. Jang, J. C. Johnson, E. Hegmann, T. Hegmann, L. T. J. Korley, Liq. Cryst. 2014, 41, 1473-1482. “Biphenyl-based liquid crystals for elevated temperature processing of polymers”
• Z. Sun,  M. Worden, Y. Wroczynskyj, V. Yathindranath, J. van Lierop, T. Hegmann, D. W. Miller, Int. J. Nanomed. 2014, 9, 3013-3026. “Magnetic field enhanced convective diffusion of iron oxide nanoparticles in an osmotically disrupted cell culture model of the blood-brain barrier”
• R. K. Shukla, X. Feng, S. Umadevi, T. Hegmann, W. Haase, Chem. Phys. Lett. 2014, 599, 80-85. “Influence of different amount of functionalized bulky gold nanorods dopant on the electrooptical, dielectric and optical properties of the FLC host”
• M. Urbanski, J. Mirzaei, T. Hegmann, H.-S. Kitzerow, Proceedings 41. German Conference on Liquid Crystals 2014, P9, 105-109. “Dispersions of functionalized gold nanoparticles in nematic liquid crystals”
• J. Mirzaei, M. Urbanski, H.-S. Kitzerow, T. Hegmann, ChemPhysChem 2014, 15, 1381-1394. “Synthesis of liquid crystal silane functionalized gold nanoparticles and their effects on optical and electro-optic properties of a structurally related nematic liquid crystal”
• M. Urbanski, J. Mirzaei, T. Hegmann, H.-S. Kitzerow, ChemPhysChem 2014, 15, 1395-1404. “Nanoparticle doping in nematic liquid crystals: Distinction between surface and bulk effects by numerical simulations”
• S. Umadevi, H.-C. Lee, V. Ganesh, X. Feng, T. Hegmann, Liq. Cryst. 2014, 41, 265-276. “A versatile, one-pot synthesis of gold nanostars with long, well-defined thorns using a lyotropic liquid crystal template”
• M. Reznikov, A. Sharma, T. Hegmann, Part. Part. Syst. Charact. 2014, 31, 257-265. “Ink-jet printed nanoparticle alignment layers: Easy design and fabrication of patterned alignment layers for nematic liquid crystals" – Inside Cover Article
• V. Yathindranath, M. Worden, Z. Sun, D. W. Miller, T. Hegmann, RSC Advances 2013, 3, 23722-23729. “A general synthesis of metal (Mn, Fe, Co, Ni, Cu, Zn) oxide and silica nanoparticles based on a low temperature reduction/hydrolysis pathway”
• V. Yathindranath, Z. Sun, M. Worden, L. J. Donald, J. A. Thliveris, D. W. Miller, T. Hegmann, Langmuir 2013, 29, 10850-10858. “One-pot synthesis of iron oxide nanoparticles with functional silane shell: A versatile general precursor for conjugations and biomedical applications”
• T. Hegmann, International Innovation Report 2013, 9, 53-55. “Modulating the properties of liquid crystals using nanoparticles as dopants” - Feature Article/Interview
• V. Yathindranath, M. Worden, V. Ganesh, M. Inokuchi, T. Hegmann, RSC Adv. 2013, 3, 9210-9213. “Highly crystalline iron/iron oxide nanosheets via liquid crystal templating”
• S. Umadevi, X. Feng, T. Hegmann, Adv. Funct. Mater. 2013, 23, 1393-1403. “Large area self-assembly of nematic liquid crystal-functionalized gold nanorods" – Frontispiece Article
• Z. Sun, V. Yathindranath, M. Worden, J. A. Thliveris, S. Chu, F. E. Parkinson, T. Hegmann, D. W. Miller, Int. J. Nanomed. 2013, 8, 961-970. “Characterization of cellular uptake and toxicity of aminosilane-coated iron oxide nanoparticles with different charge in CNS relevant cell culture models”
• D. F. Moore, V. Yathindranath, T. Hegmann, M. Pelletier, D. W. Miller, R. Schiffmann, “Directed drug convection using magnetic nanoparticles as therapeutic carriers - Meeting the challenge of specific brain pharmaco-therapeutics”, in Nanoneurosurgery and Nanoneuroscience (Taylor & Francis), 2013, Ch. 11, 147-155.
• J. Mirzaei, M. Urbanski, H.-S. Kitzerow, T. Hegmann, Phil. Trans. R. Soc. A 2013, 371, 20120256. “Hydrophobic gold nanoparticles via silane conjugation - chemically and thermally robust nanoparticles as dopants for nematic liquid crystals”
• S. Umadevi, G. Venkatchalam, T. Hegmann, “Nanoparticles as additives and building blocks for liquid crystal phases”, in Handbook of Liquid Crystals - 2nd Ed. (Wiley-VCH), 2013, Vol. 5, Ch. 16.
• J. Mirzaei, M. Reznikov, T. Hegmann, J. Mater. Chem. 2012, 22, 22350-22365. "Quantum dots as liquid crystal dopants” – Feature Article + Cover
• A. Rudzki, A. Lapanik, B. Kinkead, H. Qi, T. Hegmann, W. Haase, Soft Matter 2012, 8, 8722-8728. “Electrooptical and dielectric properties of alkylthiol-capped gold nanoparticle-ferroelectric liquid crystal nanocomposites: Influence of chain length and tethered liquid crystal functional groups”
• J. Mirzaei, R. Sawatzky, A. Sharma, M. Urbanski, K. Yu, H.-S. Kitzerow, T. Hegmann, Proc. SPIE 2012, 8279, 827983 (9 pages). “New developments in nanoparticle-liquid crystal composites: from magic-sized semiconductor nanoclusters to alignment pattern formation via nanoparticle stenciling”
• O. Stamatoiu, J. Mirzaei, X. Feng, T. Hegmann, Top. Curr. Chem. 2012, 318, 331-393. “Nanoparticles in liquid crystals and liquid crystalline nanoparticles”
• A. Sharma, M. Worden, T. Hegmann, Ferroelectrics 2012, 431, 154-163. “Nanoparticle-promoted thermal stabilization of room temperature cholesteric blue phase mixtures”
• S. Umadevi, X. Feng, T. Hegmann, Ferroelectrics 2012, 431, 164-175. “Bent-core and nematic liquid crystal functionalized gold nanorods”
• U. Shivakumar, J. Mirzaei, X. Feng, A. Sharma, P. Moreira, T. Hegmann, Liq. Cryst. 2011, 38, 1495-1514. “Nanoparticles – versatile, promising yet challenging dopants for liquid crystals”
• J. Mirzaei, M. Urbanski, Kui Yu, H.-S. Kitzerow, T. Hegmann, J. Mater. Chem. 2011, 21, 12710-12716. “Nanocomposites of a nematic liquid crystal doped with magic-sized CdSe nanocrystals as nanoscale additives”
• H. Qi, T. Hegmann, Liq. Cryst. Today 2011, 20, 102-114. “Liquid crystal-gold nanoparticle composites”
• V. Yathindranath, L. Rebbough, D. F. Moore, D. W. Miller, J. van Lierop, T. Hegmann, Adv. Funct. Mater. 2011, 21, 1457-1464. “A versatile, one-step, low-temperature, reductive synthesis to bare, hydrophilic or hydrophobic magnetite nanoparticles” – Frontispiece Article
• B. Kinkead, M. Urbanski, H. Qi, H.-S. Kitzerow, T. Hegmann, Proc. SPIE 2010, 7775, 777511. “Alignment and electro-optic effects in nanoparticle-doped nematic liquid crystals”
• M. Urbanski, B. Kinkead, T. Hegmann, H.-S. Kitzerow, Liq. Cryst. 2010, 37, 1151-1156. “Director field of birefringent stripes in liquid crystal/nanoparticle dispersions” – Front Cover Article
• M. Urbanski, B. Kinkead, H. Qi, T. Hegmann, H.-S. Kitzerow, Nanoscale 2010, 2, 1118- 1121. “Electroconvection in nematic liquid crystals via nanoparticle doping” – Inside Front Cover Article
• B. Kinkead, T. Hegmann, J. Mater. Chem. 2010, 20, 448-458. “Effects of size, capping agent, and concentration of CdSe and CdTe quantum dots doped into a nematic liquid crystal on the optical and electro-optic properties of the final colloidal liquid crystal mixture” – Back Cover
• V. Yathindranath, K. Potter, C. B. Fowler, T. Hegmann, J. van Lierop, D. F. Moore, Nanotechnology 2009, 20, 405101. “Simultaneous magnetically-directed drug convection and MR imaging” – Article of Particular Interest by the Editor & Highlighted in IOP’s
• H. Qi, T. Hegmann, ACS Appl. Mater. Interfaces 2009, 1, 1731-1738. “Multiple alignment modes for nematic liquid crystals doped with alkylthiol-capped gold nanoparticles”
• H. Qi, B. Kinkead, V. M. Marx, H. R. Zhang, T. Hegmann, ChemPhysChem 2009, 10, 1211-1218. “Miscibility and alignment effects of mixed monolayer cyanobiphenyl liquid crystal-capped gold nanoparticles in nematic cyanobiphenyl liquid crystal hosts”
• T. Hegmann, H. Qi, B. Kinkead, V. M. Marx, H. Girgis, P. A. Heiney, Can. Metall. Quarterly 2009, 48, 1-9. “Functionalized metal and semiconductor nanoparticle doped liquid crystals - Modifying optical and electro-optical properties”
• H. Qi, T. Hegmann, J. Am. Chem. Soc. 2008, 130, 14201-14206. “Post-synthesis racemization and place exchange reactions – one step further to understand the origin of chiral ligand-capped gold nanoparticle chirality”
• H. Qi, T. Hegmann, J. Mater. Chem. 2008, 18, 3288-3294. “Impact of nanoscale particles and carbon nanotubes on current and future generations of liquid crystal displays” – Invited Highlight & Inside Cover Article
• V. M. Marx, H. Girgis, P. A. Heiney, T. Hegmann, J. Mater. Chem. 2008, 18, 2983-2994. “Bent- core LC decorated gold nanoclusters: Synthesis, self-assembly, and effects in mixtures with bent-core LC hosts”
• H. Qi, B. Kinkead, T. Hegmann, Proc. SPIE 2008, 6911, 691106 (11 pages). “Effects of functionalized metal and semiconductor nanoparticles in nematic liquid crystals”
• H. Qi, B. Kinkead, T. Hegmann, Adv. Funct. Mater. 2008, 18, 212-221. “Unprecedented dual alignment mode and Freedericksz transition in planar nematic liquid crystal cells doped with gold nanoclusters” – Inside Cover Article
• H. Qi, J. O’Neil, T. Hegmann, J. Mater. Chem. 2008, 18, 374-380. “Chirality transfer in nematic liquid crystals doped with (S)-Naproxen functionalized gold nanoclusters: An induced circular dichroism study”
• M. P. Thompson, T. Hegmann, M. D. Wand, R. P. Lemieux, Liq. Cryst. 2007, 34, 987-994. “Ferroelectric liquid crystal dopants with a chiral (R,R)-2,3-difluorooctyloxy side chain: Host dependence of the polarization power”
• H. Qi, A. Lepp, P. A. Heiney, T. Hegmann, J. Mater. Chem. 2007, 17, 2139-2144. “Effects of hydrophilic and hydrophobic gold nanoclusters on the stability and ordering of bolaamphiphilic liquid crystals”
• T. Hegmann, H. Qi, V. Marx, J. Inorg. Organomet. Polym. & Mater. 2007, 17, 483-508. “Nanoparticles and liquid crystals: synthesis, self-assembly, defect formation and potential applications”
• K. Kaznatcheev, T. Hegmann, Phys. Chem. Chem. Phys. 2007, 9, 1705-1712. “Molecular ordering in a biaxial smectic-A phase studied by scanning transmission x-ray microscopy (STXM)” – Hot Paper & Cover Article
• H. Qi, T. Hegmann, J. Mater. Chem. 2006, 16, 4197-4205. “Formation of periodic stripe patterns in nematic liquid crystals doped with functionalized gold nanoparticles” – Cover Article
• C. Damm, G. Israel, T. Hegmann, C. Tschierske, J. Mater. Chem. 2006, 16, 1808-1816. “Luminescence and photoconductivity in mononuclear ortho-platinated metallomesogens”
• N. Sertova, M. Toulemonde, T. Hegmann, J. Inorg. Organomet. Polym. & Mater. 2006, 16, 91-96. “Towards recyclable nanoporous polymer membranes for the synthesis of one-dimensional nanoscale gold colloids”
• T. Hegmann, B. Neumann, R. Wolf, C. Tschierske, J. Mater. Chem. 2005, 15, 1025-1034. “Liquid crystalline paracyclophanes and ansa compounds – Series of polyether macrocycles incorporating diacetylene, phenyl, biphenyl, p-terphenyl and 2,5-diphenyl-1,3,4-thiadiazole rigid cores”
• T. Hegmann, M. R. Meadows, M. D. Wand, R. P. Lemieux, J. Mater. Chem. 2004, 14, 185-190. “Ferroelectric liquid crystal induced by atropisomeric biphenyl dopants: Influence of the SmC host mixture composition”
• T. Hegmann, J. Kain, S. Diele, B. Schubert, H. Bögel, C. Tschierske, J. Mater. Chem. 2003, 13, 991- 1003. “Molecular design at the calamitic/discotic cross-over point. Mononuclear ortho-metallated mesogens based on the combination of rod-like phenylpyrimidines and -pyridines with bent or half-disc-shaped diketonates”
• B. Neumann, T. Hegmann, C. Wagner, P. R. Ashton, R. Wolf, C. Tschierske, J. Mater.Chem. 2003, 13, 778-784. “Liquid crystalline macrocycles containing phenylpyrimidine units”
• T. Hegmann, R. P. Lemieux, J. Mater. Chem. 2002, 12, 3368-3370. “Large electroclinic effect in SmA* liquid crystals induced by an atropisomeric biphenyl dopant”
• T. Hegmann, J. Kain, S. Diele, G. Pelzl, C. Tschierske, Angew. Chem., Int. Ed. 2001, 40, 887-890. “Evidence for the existence of the McMillan phase in a binary system of a metallomesogen and 2,4,7- trinitrofluorenone”
• M. T. Allen, S. Diele, K. D. M. Harris, T. Hegmann, B. M. Kariuki, D. Lose, J. A. Preece, C. Tschierske, J. Mater. Chem. 2001, 11, 302-311. “Intermolecular organization of triphenylene-based discotic mesogens by interdigitation of alkyl chains”
• T. Hegmann, B. Neumann, S. Diele, C. Tschierske, J. Mater. Chem. 2000, 10, 2244-2248. “Butterfly-mesogens: Paracyclophane based macrocyclic metallomesogens forming smectic and columnar liquid crystalline phases”
• T. Hegmann, F. Peidis, S. Diele, C. Tschierske, Liq. Cryst. 2000, 27, 1261-1265. “Combination of molecular rods and half-discs: Transition from lamellar to columnar order in multichain mononuclear ortho-palladated metallomesogens”
• M. T. Allen, K. D. M. Harris, B. M. Kariuki, N. Kumari, J. A. Preece, S. Diele, D. Lose, T. Hegmann, C. Tschierske, Liq. Cryst. 2000, 27, 689-692. “Intermolecular organization of triphenylene-based discotic mesogens by interdigitation of alkyl chains”
• A. Pegenau, T. Hegmann, C. Tschierske, S. Diele, Chem.-Eur. J. 1999, 5, 1643-1660. “The importance of micro-segregation for mesophase formation: Thermotropic columnar mesophases of tetrahedral and other low-aspect-ratio organic materials”
• B. Neumann, T. Hegmann, R. Wolf, C. Tschierske, Chem. Commun. 1998, 105-106. “Binuclear cyclopalladated cyclophanes: Towards a new family of metallomesogens”

PATENTS

• R. A. Williams, G. A. R. Rohakley, M. E. Prévôt, T. Hegmann, US Prov. 63/712,623 (10/2024), “Zero-power, optical toxic gas and vapor sensors utilizing printed nematic liquid crystal patterns on selectively reactive substrates”
• M. Prévôt, A. Nemati, J. Vanegas García, E. Hegmann, T. Hegmann, 11/2018, US PCT 62/586,304, “Detection of gases and vapors by patterned nanoparticle liquid crystal alignment”
• M. Reznikov, A. Sharma, T. Hegmann, 04/15/2013, US PCT 61/853994 "Patterned liquid crystal alignment layers via nanoparticle printing".
• A. Neshat, A. Sharma, T. Hegmann, E. Hegmann, 04/15/2013, US PCT 61/853993 "Biodegradable side-chain LC elastomers: smart responsive scaffolds".
• B. Kinkead, T. Hegmann, 2012, US 8,323,755 "Planar nematic liquid crystal cells doped with gold nanoparticles and methods of inducing a Freedericksz transition".
• V. Yathindranath, D. F. Moore, J. van Lierop, T. Hegmann, 2013, US 8,383,085 "Methods of making iron containing nanoparticles".
• V. Yathindranath, T. Hegmann, J. van Lierop, D. F. Moore, 2008, US PCT 61/055,683 "Magnetically directed drug convection".
• H. Qi, T. Hegmann, 2011, US 8,071,181. "Metal nanoparticles and use thereof for inducing chirality in liquid crystal phases" (International: 12/086,720).
• H. Qi, T. Hegmann, 2012, US 8,294,838. "Planar nematic liquid crystal cells doped with gold nanoparticles and methods of inducing a Freedericksz transition".
• V. M. Marx, T. Hegmann, 2012, US 8,092,712. "Bent-core LC decorated gold nanoparticles".
• M. Worden, Z. Sun, D. M. Miller, T. Hegmann, 2015, US PCT 62/169,602“Aqueous synthesis of polyhedral “brick-like” iron oxide nanoparticles for hyperthermia and T2 MRI contrast enhancement, and for targeting endothelial cells for therapeutic delivery”
• Y. Gao, T. Hegmann, E. Hegmann, 2014, US PCT /US2014/071618 “Biocompatible smart responsive scaffold having interconnected pores”