Detection of Off‐Resonance Single‐Walled Carbon Nanotubes by Enormous Surface‐Enhanced Raman Scattering

• DOI: 10.1002/adom.202100559
• Publication Date: 2021-08-16T04:39:46Z
• Authors: Daqi Zhang; Chenmaya Xia; Sheng Li; Haoming Liu; Li Ding; Xiyan Liu; Min Lyu; Ruoming Li; Jing Ju; Juan Yang; Yan Li
• Keywords: 01 natural sciences; 0104 chemical sciences

Abstract The resonant Raman spectroscopy can only detect on‐resonance single‐walled carbon nanotubes (SWNTs) within the laser resonance window. In principle, surface‐enhanced scattering (SERS) expand However, detection of off‐resonance SWNTs by SERS remains challenging due to difficulties in locating exactly at hot spots with enormous enhancements. Here, polyhedral gold nanocrystals (AuNCs) are situ prepared on for via a facile ultrasonic spray pyrolysis method. fact that edges AuNCs attach ensures location perfectly spots. Consequently, enhancement enables maximum factor (3.4 ± 0.6) × 10 4 an individual SWNT, which is about two orders magnitude higher than reported literatures. ratio also dramatically increased from 33% without 76% SERS. existence suppresses antenna effects and allows effective enhancements under various polarization conditions. enable several new bands SWNTs.