Interfacial bonding of gold nanoparticles on a H-terminated Si(100) substrate obtained by electro- and electroless deposition.
Dome-shaped gold nanoparticles (with an average diameter of 10.5 nm) are grown on H-terminated Si(100) substrates by simple techniques involving electro- and electroless deposition from a 0.05 mM AuCl3 and 0.1 M NaClO4 solution. XPS depth profiling data (involving Au 4f core-level and valence band spectra) reveal for the first time the formation of gold silicide at the interface between the Au nanoparticles and Si substrate. UV-visible diffuse reflectance spectra indicate that both samples have surface plasmon resonance maxima at 558 nm, characteristic of an uniform distribution of Au nanoscale particles of sufficiently small size. Glancing-incidence XRD patterns clearly show that the deposited Au nanoparticles belong to the fcc phase, with the relative intensity of the (220) plane for Au nanoparticles obtained by electroless deposition found to be notably larger than that by electrodeposition.
Zhao
Liyan
L
WATLab, and Department of Chemistry, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
Siu
Allan Chung-Lung
AC
Petrus
Joseph Andrew
JA
He
Zhenhua
Z
Leung
Kam Tong
KT
D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles; D012825:Silicon / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet
D006046:Gold; D012825:Silicon