Dr. Iqbal visited Mesoscale Materials Chemistry Laboratory, National Institute for Materials Science (NIMS), Japan, on April-July 2021. He carried out a collaborative project with Prof. Yusuke Yamauchi and Dr. Joel Henzie entitled “Investigation on the Localized Surface Plasmon Resonance (LSPR) Effect on Porous Metallic Pd Nanostructures towards Enhanced Electrocatalytic Activity.” Dr. Iqbal successfully synthesized mesoporous Pd nanospheres with a uniform pore size and structure. The average nanospheres diameter and pore sizes were about 100 nm and 30 nm, respectively. Dr. Joel conducted the simulation to figure out how the nanoscale geometry of metal affects the oscillation of delocalized electron couple to electromagnetic (EM) field using the finite-difference time-domain method. Since the intensity and wavelength of LSP are very sensitive to the 3D nanoscale architecture of the metal, turning the mesoporous structure will change the wavelength of the resonance and its local EM intensity. The high EM intensities associated with plasmons have been shown to increase bleaching and catalyze the photodegradation of dye molecules. Dr. Iqbal and co-workers used rhodamine 6G (R6G) dye as a simple assay to quantify the relative EM intensity of the LSPs of mesoporous nanoparticles compared to commercial palladium black (PdB) catalyst.
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