We have achieved a substantial milestone toward the mass production of macroscopic monolayers and thin films of colloidal nanocrystals on various substrates, including conducting metals and doped-semiconducting substrates. In fact, this work can claim a leading position among all nanocrystal assembly and shaping techniques, as our approach combines the advantages of liquid-phase, colloidal suspension approaches with the superior deposition rate, size scalability, and cost effective features of electrophoretic deposition (EPD) in non-polar solvents to achieve monolayer-by-monolayer deposition control over nanocrystal films.
My group also studies and synthesizes rare earth sequioxide (Eu2O3, Gd2O3: RE3+, etc.) and europium chalcogenide (EuS, EuTe, etc.) nanocrystals to investigate their phosphorescence and magnetic characteristics.
Alex J. Krejci, Kevin. G. Yager, Christopher Ruggiero, and James H. Dickerson, X-ray scattering as a liquid and solid phase probe of ordering within sub-monolayers of iron oxide nanoparticles fabricated by electrophoretic deposition, Nanoscale 6 (8), 4047 – 4051, 2014.
Weidong He, Xiao Lin, James H. Dickerson, and John B. Goodenough, An electrochemical device for three-dimensional (3D) diffusivity measurement in fuel cells, Nano Energy 2, 1004-1009, 2013.
Karel Žďánský and James H. Dickerson, Improved speed of hydrogen detection by Schottky diodes on InP with electrophoretically deposited Pt nanoparticles and graphite contacts, Sensors & Actuators B: Chemical, 84, 295-300, 2013.
I. Gonzalo-Juan, A. J. Krejci, and J. H. Dickerson, Toward Dynamic Control over TiO2 Nanocrystal Monolayer-by-Monolayer Film Formation by Electrophoretic Deposition in Non-Polar Solvents, Langmuir 28,5295, 2012.
W. He, J. Lin, B. Wang, S. Tuo, S. T. Pantelides, and J. H. Dickerson, An analytical expression for the van der Waals interaction in oriented-attachment growth: a spherical nanoparticle and a growing cylindrical nanorod, Physical Chemistry Chemical Physics 14, 4548, 2012.
Weidong He, Bin Wang, and J. H. Dickerson, Overall Concentration Polarization and Limiting Current Density of Fuel Cells with Nanostructured Electrodes, Nano Energy 1, (6) 828-832, 2012.