Jump to main content
Jump to site search


Fabrication, Characterization, and High Temperature Surface Enhanced Raman Spectroscopic Performance of SiO2 Coated Silver Particles

Abstract

We present a systematic study on fabrication, characterization and high temperature surface enhanced Raman spectroscopic (SERS) performance of SiO2 coated silver nanoparticles (Ag@SiO2) on a flat substrate, aiming to obtain a thermal robust SERS substrate for the monitor of high temperature reactions. We confirm that a 10-15 nm SiO2 coating provide a structure stability up to 900°C without significantly sacrificing enhancement factor, while the un-coated particle cannot retain SERS effect above 500°C. Finite difference time domain method (FDTD) simulation results supported that SiO2 coating almost have no influence on the distribution of the electric field but only physically trapped the most enhanced spot inside the coating layer. On this thermally robust substrate, we confirmed the SERS of horizontally aligned single walled carbon nanotubes are stable at elevated temperatures, and demonstrate an in situ Raman monitoring on the atmosphere annealing process of nanodiamonds, in which the interconverting process of C-C bonds is un-ambitiously observed. We claim this is a first experimental proof that high temperature SERS effect can be preserved and applied in a chemical reaction at temperature above 500°C. This versatile substrate also enables novel opportunities for observing growth, etching, and structure transformation of many 0D and 2D nano-materials.

Back to tab navigation

Supplementary files

Publication details

The article was received on 19 Nov 2017, accepted on 04 Feb 2018 and first published on 05 Feb 2018


Article type: Paper
DOI: 10.1039/C7NR08631H
Citation: Nanoscale, 2018, Accepted Manuscript
  •   Request permissions

    Fabrication, Characterization, and High Temperature Surface Enhanced Raman Spectroscopic Performance of SiO2 Coated Silver Particles

    M. Liu, R. Xiang, Y. Lee, K. Otsuka, Y. Ho, T. Inoue, S. Chiashi, J. Delaunay and S. Maruyama, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR08631H

Search articles by author

Spotlight

Advertisements