(579j) Controlled Electrochemical Deposition of Charge-Transfer Salt Nanorods on Nanoparticle Seeds

This talk will focus on the controlled synthesis of tetrathiafulvalene bromide charge-transfer salt (TTFBr) on Au, Pt and Pd nanoparticles (NPs) of different shapes. The NPs are synthesized directly onto highly oriented pyrolytic graphite (HOPG) or glassy carbon (GC) using electrochemical methods in multiple steps. The size of PdNPs and PtNPs varies from 50 nm to 100 nm. The shape of the NPs is controlled by the applied potential and the pulse time of teach step. Then TTF-Br are deposited onto the NP-modified HOPG or GC. The morphology and orientation of TTF-Br nanorods are controlled by the size and shape of the NPs. The size, especially the width, of the nanorods is linearly related to the size of the NPs. The orientation of the nanorods is controlled by facet of the NP that nucleated the nanorods. The fundamental seed-mediated electrocrystallization study is conducted in order to understand the control of size and orientation of TTF-Br nanorods for their use as sensing elements in chemical sensors and sensor arrays. This work is supported by the National Science Foundation