| Title: | Efficient SERS Response of Porous-ZnO-Covered Gold Nanoarray Chips to Trace Benzene-Volatile Organic Compounds |
| Author(s): | Zhao Z; Bao H; Zhao Q; Fu H; Zhou L; Zhang H; Li Y; Cai W; |
| Address: | "Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, PR China. University of Science and Technology of China, Hefei 230026, PR China" |
| Journal Title: | ACS Appl Mater Interfaces |
| ISSN/ISBN: | 1944-8252 (Electronic) 1944-8244 (Linking) |
| Abstract: | "Fast and sensitive detection of gaseous volatile organic compounds (VOCs), based on surface-enhanced Raman spectroscopy (SERS), is still a challenge due to their weak interaction with plasmonic metals and overly small Raman scattering cross sections. Herein, we propose a simple strategy to achieve the SERS-based highly efficient detection of trace benzene-VOCs (B-VOCs) based on a composite chip. The composite chip is designed and fabricated via covering the porous zinc oxide on gold nanoarrays by a one-step solution growth method. Such composite chip shows highly selective capture of gaseous B-VOCs (benzene, toluene, nitrobenzene, xylene, and chlorobenzene, etc.), which leads to the rapid and sensitive SERS responses to them. Typically, this chip can response to gaseous toluene within 30 s, and the lowest detectable concentration is below 10 ppb. Further experiments have revealed that there exists an optimal thickness of the ZnO covering layer for the highly efficient SERS response to the B-VOCs, which is about 150 nm. Also, such a composite chip is recoverable in SERS response and hence reusable. The highly efficient SERS response of the composite chip to the B-VOCs is attributed to the porous structure-enhanced molecular adsorption and the electromagnetic-chemical dual-enhancement mechanism. This work not only presents a practical SERS chip for the efficient detection of the typical B-VOCs but also provides a deep understand the interaction between the B-VOCs and the ZnO as well as the chemical enhancement mechanism" |
| Keywords: | dual-enhancement mechanism fast and sensitive SERS detection gaseous benzene-VOCs porous zinc oxide covered gold nanoarray chips recoverable SERS response; |
| Notes: | "PubMed-not-MEDLINEZhao, Zhipeng Bao, Haoming Zhao, Qian Fu, Hao Zhou, Le Zhang, Hongwen Li, Yue Cai, Weiping eng 2022/10/13 ACS Appl Mater Interfaces. 2022 Oct 26; 14(42):47999-48010. doi: 10.1021/acsami.2c11682. Epub 2022 Oct 12" |
