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Our group is interested in nano and microparticles in general and more specifically in their modification and assembly. We combine our knowledge of Chemical Engineering, Chemistry, Material and Surface Science, and Molecular Electronics to discover new materials and applications for asymmetric particles.

Major Reserach Areas:

• Janus and Patchy Particles at Interfaces

• Dye-sensitized Solar Cells

• Two- and Three-dimensional Particle Assembly

• Patchy Particle Swimmers

• Asymmetric Modification of Particle Surfaces

• Nano- and Microparticle Films

• Nano- and Microparticles as Templates

Keywords: Molecular and field directed particle assembly, chemical and material modification of particle surfaces, two- and three-dimensional particle assembly, vacuum technology, surface and material science, nanoparticle synthesis for DSSC

For the most updated list of publications, please see my GoogleScholar and ResearchGate pages.

"Ellipsometric Identification of Transition from a Layered Metal-Dielectric Film to a Hyperbolic Metamaterial" Samhita Kattekola, Vinod M. Menon, Alexander Couzis, and Ilona Kretzschmar ACS Applied Optical Materials, 2026, 4 217–226 (open access).

"Ion stencils used for synthesis of patchy nanoparticles" Ilona Kretzschmar and Emanuela Bianchi Nature, 2025, 646 551-552.

"Predicting Magnetic Janus Particle Assembly with Differential Evolution Algorithm" Eric McPherson, Kenneth Kroenlein, and Ilona Kretzschmar J. Chem. Phys., 2025, 163 024906.

"Dynamics of a bottom-heavy Janus particle near a wall under shear flow" Zohreh Jalilvand, Daniele Notarmuzi, Ubaldo M. Córdova-Figueroa, Emanuela Bianchi, and Ilona Kretzschmar Soft Matter, 2025, 21 5773-5784 (Open Access).

"Frenkel excitons in heat-stressed supramolecular nanocomposites enabled by tunable cage-like scaffolding" Kara Ng, Megan Webster, William P. Carbery, Nikunjkumar Visaveliya, Pooja Gaikwad, Seogjoo J. Jang, Ilona Kretzschmar, Dorthe M. Eisele Nature Chemistry, 2020, 12 1157-1164.

"Preface to the Advances in Active Materials Special Issue" I Kretzschmar, MM SantoreLangmuir, 2020, 36 6859-6860.

"Exploring the Correlation Between Stability, Fluxionality and Absorption Spectra of Ultra-Small CdSe Clusters: A Computational Study" Gabriel I. Lopez-Morales, SJ Kugelmas, Anthony Cruz, Megan Webster, Donna McGregor, Ilona Kretzschmar and Gustavo E Lopez J. Phys. Chem. C, 2020, 124 12672–12681.

"Kinetics of Formation of Quantum Dot Solvent N-Oleoylmorpholine" Megan M. Webster, Michael Lugo-Pimentel, Ilona Kretzschmar, Marco J. Castaldi Industrial & Engineering Chemistry Research, 2020, 59 8562-8570.

"Pt-SiO2 Janus Particles and the Water/Oil Interface – A Competition Between Motility and Thermodynamics" Zohreh Jalilvand, Hamad Haider, Jinqin Cui, and Ilona Kretzschmar Langmuir, 2020, 36 6880–6887.

"Floor- or ceiling-sliding for chemically active, gyrotactic, sedimenting Janus particles" Sayan Das, Zohreh Jalilvand, Mihail N. Popescu, William E. Uspal, Siegfried Dietrich, and Ilona Kretzschmar Langmuir, 2020, 36 7133–7147.

"Self-Assembly of Magnetic Colloids with Radially Shifted Dipoles" Jonathan A. Victoria-Camacho, Ronal A. DeLaCruz-Araujo, Ilona Kretzschmarc and Ubaldo M. Córdova-Figueroa Soft Matter, 2020, 16 2460-2472.

"Broadband Chiral Hybrid Plasmon Modes on nanofingernail Substrates" Paulina Librizzi, Aneek Biswas, Roger Chang, Xiang-Tian Kong, Mathew Moorcarme, Gaurav Ahuja, Ilona Kretzschmar, and Luat T. Vuong Nanoscale, 2020, 12 3827-3833.

“Effect of Orientation and Wetting Properties on the Behavior of Janus Particles at the Air–Water Interface” Ellen Knapp, Raymond R. Dagastine, Raymond S. Tu, and Ilona Kretzschmar ACS Applied Materials and Interfaces, 2020, 12 5128-5135.

“Surface tension anomaly observed for chemically-modified Janus particles at the air/water interface” Sepideh Razavi, Laura M. Hernandez, A. Read, Watson L. Vargas, and Ilona Kretzschmar Journal of Colloid and Interface Science, 2019, 558 95-99.

“Impact of surface amphiphilicity on the interfacial behavior of Janus particle layers under compression” Sepideh Razavi, Binhua Lin, Ka Yee C. Lee, Raymond S. Tu, and Ilona Kretzschmar Langmuir, 2019, 35 15813-15824.

“Measuring, Modeling, and Predicting the Magnetic Assembly Rate of 2D-Staggered Janus Particle Chains” Thomas W. Long, Ubaldo M. Córdova-Figueroa, and Ilona Kretzschmar  Langmuir, 2019, 35 8121-8130.

"Self-assembly of magnetic colloids with shifted dipoles” Gabriel I. Vega-Bellido, Ronal A. DeLaCruz-Araujo, I Kretzschmar, and Ubaldo M. Córdova-FigueroaSoft Matter, 2019, 15 4078-4086.

"Experimental study of the motion of patchy particle swimmers near a wall" Z Jalilvand, AB Pawar, I Kretzschmar Langmuir 2018, 34, 15593-15599.

"Investigation on electrical surface modification of waste to energy ash for possible use as an electrode material in microbial fuel cells" M Webster, HY Lee, K Pepa, N Winkler, I Kretzschmar, MJ Castaldi Waste Management & Research 2018, 36, 259-268.

“Janus particle-based microprobes: Determination of object orientation” Jingqin Cui, Deng Long, Pavel Shapturenka, Ilona Kretzschmar, Xinyi Chen, and Taihong Wang  Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2017, 513 452-462.

“Directed motion of metallodielectric particles by contact charge electrophoresis”  Yong Dou, Charles A. Cartier, Wenjie Fei, Shashank Pandey, Sepideh Razavi, Ilona Kretzschmar, and Kyle J.M. Bishop  Langmuir, 2016, 32 13167-13173.

“Control of photo-induced voltages in plasmonic crystals via spin-orbit interactions”  Nicholas V. Proscia, Matthew Moocarme, Roger Chang, Ilona Kretzschmar, Vinod M. Menon, and Luat T. Vuong  Optics Express, 2016, 24 10402-10411.

“Impact of particle shape on electron transport and lifetime in zinc oxide nanorod-based dye-sensitized solar cells” Roger Chang, Kemakorn Ithisuphalap and Ilona Kretzschmar*  AIMS Materials Science, 2016, 3 51-65.

“Mechanical Stability of Polystyrene and Janus Particle Monolayers at the Air/Water Interface” Jessica Lenis, Sepideh Razavi, Kathleen D. Cao, Binhua Lin, Ka Yee C. Lee, Raymond S. Tu and Ilona Kretzschmar*  J. Am. Chem. Soc., 2015, 137 15370-15373.

“Collapse of Particle-laden Interfaces under Compression: Buckling vs. Particle Expulsion” Sepideh Razavi, Kathleen D. Cao, Binhua Lin, Ka Yee C. Lee, Raymond S. Tu and Ilona Kretzschmar*  Langmuir, 2015, 31 7764-7775.

“Two-Dimensional Array of Silica Particles as a SERS Substrate” Dane Christie, John Lombardi, and Ilona Kretzschmar*  J. Phys. Chem. C, 2014, 118 9114–9118.

“Molecular Dynamics Simulations: Insight into Molecular Phenomena at Interfaces” Sepideh Razavi, Joel Koplik, and Ilona Kretzschmar*  Langmuir, 2014, 30 11272-11283.

“Using the discrete dipole approximation and holographic microscopy to measure rotational dynamics of non-spherical colloidal particles” Anna Wang, Thomas G. Dimiduk, Jerome Fung, Sepideh Razavi, Ilona Kretzschmar, Kundan Chaudhary, and Vinothan N. Manoharan  J. Quant. Spectrosc. Radiat. Transfer, 2014, 146 499-509.

"Nanoparticles at liquid interfaces: rotational dynamics and angular locking" Sepideh Razavi, Ilona Kretzschmar, Joel Koplik, and Carlos E. Colosqui J. Chem. Phys., 2014, 140 014904.

"Template-Assisted GLAD: Approach to Single and Multi-patch Patchy Particles with Controlled Patch Shape" Zhenping He and Ilona Kretzschmar Langmuir, 2013, 29, 15755-15761.

"Viscosity-Dependent Janus Particle Chain Dynamics" Bin Ren and Ilona Kretzschmar Langmuir, 2013, 29, 14779-14786.

"Behaviour of iron oxide (Fe3O4) Janus particles in overlapping external AC electric and static magnetic fields" Aleksey Ruditskiy, Bin Ren, and Ilona Kretzschmar Soft Matter, 2013, 9, 9174-9181.

"Molecular dynamics simulations of the evaporation of particle-laden droplets" Weikang Chen, Joel Koplik, and Ilona Kretzschmar Phys. Rev. E, 2013, 87, 052404.

"The Effect of Capillary Bridging on Janus Particle Stability at the Interface of Two Immiscible Liquids" Sepideh Razavi, Joel Koplik, and Ilona Kretzschmar* Soft Matter, 2013, 9, 4585-4589.

"3DOM TiO2 Electrodes: Fabrication of inverse TiO2 opals for pore-size dependent characterization" Sonia Mathew, Stephen Ma, and Ilona Kretzschmar* J. Mater. Res., 2013, 28, 369-377.

"Template-Assisted Fabrication of Patchy Particles with Uniform Patches" Zhenping He and Ilona Kretzschmar* Langmuir, 2012, 28, 9915-9919.

"Topological Transitions in Metamaterials" Harish N. S. Krishnamoorthy, Zubin Jacob, Evgenii Narimanov, Ilona Kretzschmar, and Vinod M. Menon Science, 2012, 336, 205-209.

"The effect of Janus particles as filler materials for acrylate-based dielectric elastomers" Hsin-yu Chen, Ashok J. Maliakal, and Ilona Kretzschmar* Proc. SPIE 8340, 2012, 83402W.

"Assembly Behavior of Iron Oxide-Capped Janus Particles in a Magnetic Field" Bin Ren, Aleksey Ruditsjiy, Jung Hun (Kevin) Song, and Ilona Kretzschmar Langmuir, 2012, 28, 1149–1156.

"Coalescence of particle-laden drops with a planar oil–water interface" David Harbottle, Pablo Bueno, Rebecka Isaksson, and Ilona Kretzschmar J. Colloid Interface Sci., 2011, 362, 235–241.

"Surface-anisotropic spherical colloids in geometric and field confinement" I. Kretzschmar* and J. H. (Kevin) Song Curr. Opin. Colloid Interface Sci., 2011, 16, 84-95.

"Programmed Assembly of Metallodielectric Patchy Particles in External AC Electric Fields" S. Gangwal, A. B. Pawar, I. Kretzschmar, and O. D. Velev Soft Matter, 2010, 6, 1413 - 1418.

"Fabrication, Assembly, and Application of Patchy Particles" A. B. Pawar and I. Kretzschmar* Macromolec. Rapid Comm., 2010, 31, 150-168.
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"Guided ion beam and theoretical studies of the reaction of Ag+ with CS2: Gas-phase thermochemistry of AgS+ and AgCS+ and insight into spin-forbidden reactions" P. B. Armentrout and I. Kretzschmar J. Chem. Phys, 2010, 132, 024306.

"Guided ion beam and theoretical studies of the reaction of Ru+ with CS2 in the gas-phase: thermochemistry of RuC+, RuS+, and RuCS+" P. B. Armentrout and I. Kretzschmar PCCP, 2010, 12, 4078–4091.