用于表面增强拉曼光谱的银纳米棒的降解机制

Degradation Mechanism of Ag Nanorods for Surface Enhanced Raman Spectroscopy.

作者信息

Bachenheimer Lou, Scherzer Ryan, Elliott Paul, Stagon Stephen, Gasparov Lev, Huang Hanchen

机构信息

Department of Mechanical Engineering, University of Connecticut, Storrs, CT, 06269, USA.

Department of Mechanical Engineering, University of North Florida, Jacksonville, FL, 32224, USA.

出版信息

Sci Rep. 2017 Nov 24;7(1):16282. doi: 10.1038/s41598-017-16580-2.

DOI:10.1038/s41598-017-16580-2

PMID:29176618

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5701121/

Abstract

This paper reports a degradation mechanism of silver (Ag) nanorods that are used as substrates for surface enhanced Raman spectroscopy (SERS). The attachment of sulfur and hydrocarbons to the surfaces of Ag nanorods is observed when they are stored in ambient over four months. This attachment is observed to correlate with ~20% decrease in SERS signal. The attachment, and thereby the signal degradation, takes three weeks to complete, and remains stable after the initial decay over the rest of the four month test period. While this degradation mechanism is a limitation to the gross enhancement, the ensuing stability beyond three weeks is encouraging.

摘要

本文报道了用作表面增强拉曼光谱（SERS）基底的银（Ag）纳米棒的降解机制。当Ag纳米棒在环境中储存四个多月时，观察到硫和碳氢化合物附着在其表面。观察到这种附着与SERS信号约20%的下降相关。这种附着以及由此导致的信号降解需要三周时间完成，并且在四个月测试期的其余时间里，在初始衰减之后保持稳定。虽然这种降解机制是总体增强效果的一个限制，但三周后随之而来的稳定性令人鼓舞。