title: Highly reproducible surface-enhanced Raman spectra on semiconductor SnO2 octahedral nanoparticles.
abstract: Highly reproducible surface-enhanced Raman scattering (SERS) spectra are obtained on the surface of SnO(2) octahedral nanoparticles. The spot-to-spot SERS signals show a relative standard deviation (RSD) consistently below 20 % in the intensity of the main Raman peaks of 4-mercaptobenzoic acid (4-MBA) and 4-nitrobenzenethiol (4-NBT), indicating good spatial uniformity and reproducibility. The SERS signals are believed to mainly originate from a charge-transfer (CT) mechanism. Time-dependent density functional theory (TD-DFT) is used to simulate the SERS spectrum and interpret the chemical enhancement mechanism in the experiment. The research extends the application of SERS and also establishes a new uniform SERS substrate.
authors.affiliation: School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics, Beijing, China.
authors.forename: Li
authors.initials: L
authors.lastname: Jiang
authors.forename: Penggang
authors.initials: P
authors.lastname: Yin
authors.forename: Tingting
authors.initials: T
authors.lastname: You
authors.forename: Hua
authors.initials: H
authors.lastname: Wang
authors.forename: Xiufeng
authors.initials: X
authors.lastname: Lang
authors.forename: Lin
authors.initials: L
authors.lastname: Guo
authors.forename: Shihe
authors.initials: S
authors.lastname: Yang