| Title: | Au@ZIF-8 Core-Shell Nanoparticles as a SERS Substrate for Volatile Organic Compound Gas Detection |
| Author(s): | Chen QQ; Hou RN; Zhu YZ; Wang XT; Zhang H; Zhang YJ; Zhang L; Tian ZQ; Li JF; |
| Address: | "MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, College of Energy, College of Materials, Xiamen University, Xiamen 361005, China. State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China" |
| DOI: | 10.1021/acs.analchem.0c05432 |
| ISSN/ISBN: | 1520-6882 (Electronic) 0003-2700 (Linking) |
| Abstract: | "Surface-enhanced Raman spectroscopy (SERS) is a promising ultrasensitive analysis technology due to outstanding molecular fingerprint identification. However, the measured molecules generally need to be adsorbed on a SERS substrate, which makes it difficult to detect weakly adsorbed molecules, for example, the volatile organic compound (VOC) molecules. Herein, we developed a kind of a SERS detection method for weak adsorption molecules with Au@ZIF-8 core-shell nanoparticles (NPs). The well-uniformed single- and multicore-shell NPs can be synthesized controllably, and the shell thickness of the ZIF-8 was able to be precisely controlled (from 3 to 50 nm) to adjust the distance and electromagnetic fields between metal nanoparticles. After analyzing the chemical and physical characterization, Au@ZIF-8 core-shell NPs were employed to detect VOC gas by SERS. In contrast with multicore or thicker-shell nanoparticles, Au@ZIF-8 with a shell thickness of 3 nm could efficiently probe various VOC gas molecules, such as toluene, ethylbenzene, and chlorobenzene. Besides, we were capable of observing the process of toluene gas adsorption and desorption using real-time SERS technology. As observed from the experimental results, this core-shell nanostructure has a promising prospect in diverse gas detection and is expected to be applied to the specific identification of intermediates in catalytic reactions" |
| Notes: | "PubMed-not-MEDLINEChen, Qing-Qi Hou, Ruo-Nan Zhu, Yue-Zhou Wang, Xiao-Ting Zhang, Hua Zhang, Yue-Jiao Zhang, Lin Tian, Zhong-Qun Li, Jian-Feng eng 2021/05/05 Anal Chem. 2021 May 18; 93(19):7188-7195. doi: 10.1021/acs.analchem.0c05432. Epub 2021 May 4" |
