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Title: Interaction between indium tin oxide nanoparticles and cytochrome c: A surface-enhanced Raman scattering and absorption spectroscopic study

Indium-tin-oxide (ITO) nanoparticles were annealed in vacuum or reducing atmosphere to obtain different surface structures and investigate their influence on the adsorptive character and conformation of cytochrome c (Cyt c) molecule. Annealing-induced morphometric or structural changes of ITO nanoparticles were characterized by instruments of transmission electron microscopy, x-ray diffraction, and Raman scattering. Semiconductor ITO nanoparticle-enhanced Raman scattering of Cyt c was observed and the enhanced efficiency was found to closely depend on the surface structures which control the adsorbance of buffer anions needed for Cyt c loading. Direct electron transfer between Cyt c and ITO surface at the moment of molecular elastic collision was found and a reverse electron transfer process for O-terminated surface and metal-terminated surface was observed, according to absorption spectroscopic measurement on the residual solution.
Authors:
; ; ;  [1] ;  [2]
  1. Department of Physics, Southeast University, Nanjing 211189 (China)
  2. School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189 (China)
Publication Date:
OSTI Identifier:
22490738
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; ANIONS; ANNEALING; ELECTRON TRANSFER; INDIUM; MOLECULES; NANOPARTICLES; RAMAN EFFECT; SEMICONDUCTOR MATERIALS; SURFACES; TIN OXIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION