- Diploma (Chemistry), 1996, Technical University of Berlin, Berlin, Germany
- Ph.D. (Chemistry) 1999, Technical University of Berlin, Berlin Germany
- Fedeor-Lynen Fellow (Chemistry), 2000-01, Harvard University, Cambridge, MA
- Postdoctoral Associate (Electrical Engineering) 2002-04, Yale University, New Haven, CT
Molecular and nanoparticle self assembly, chemical and material modification of nanoparticle surfaces, two- and three-dimensional nanoparticle assembly, vacuum technology, surface and material science
The desire for smaller, faster, lighter, and also flexible electronics will pose a problem for silicon-based technology in the near future. It is not the device size per se that is at the core of this problem. Functional transistors with a gate length of 6 nm have recently been reported by IBM. However, it is the planarity of silicon-based architecture and the necessity of interconnects that limit the number of devices per volume as well as the flexibility of modern electronics. First attempts at “three-dimensional” silicon-based structures (note this is strictly speaking not really a three-dimensional technology) have been made with the semiconductor-on-insulator (SOI) technology, but high defect concentrations in the thin silicon films due to lattice mismatches are hampering the feasibility of this approach at the very small scale. Furthermore, mass production and power dissipation present monumental tasks in Si-based technology at the nanometer length scale. It is obvious, that within the next 10 to 20 years, a new technology will be developed. It will be non-planar, allow a simple approach to power dissipation, and can be interfaced with the silicon industry, but will not depend on single-crystal silicon.
My research approaches this task by studying the directed self-assembly of modified nanoscopic particles. This research combines three areas; (1) self-assembly, (2) nanoscopic building blocks, and (3) molecule-material interactions. Self-assembly is economically interesting because it is highly parallel, easy to do, and can also be environmentally compatible. Nanoscopic building blocks are ideal for the new technology, because they can be synthesized in many different shapes, from a large variety of materials (metallic, semiconducting, and insulating) and they have nanometer dimensions. Molecule-material interactions govern the growth of nanoparticles, their interactions with each other and with other materials, and their self-assembly. Excellent control of these interactions will be the tool to obtain diverse three-dimensional structures and devices. For example, interconnects, diodes, transistors, and sensors, are just a couple of possible device structures that one can imagine to assembled with directed self-assembly.
"Two-Dimensional Array of Silica Particles as a SERS Substrate" Dane Christie, John Lombardi, and Ilona Kretzschmar J. Phys. Chem. C, 2014, in press.
"Molecular Dynamics Simulations: Insight into Molecular Phenomena at Interfaces" Sepideh Razavi, Joel Koplik, and Ilona Kretzschmar Langmuir, 2014, in press.
"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, in press.
"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.
Featured on Frontispiece
"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.