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Nanomaterials (Basel)

Title:		"Self-Assembled Bifunctional Copper Hydroxide/Gold-Ordered Nanoarray Composites for Fast, Sensitive, and Recyclable SERS Detection of Hazardous Benzene Vapors"
Author(s):		Lu Y; Yuan X; Jia C; Lei B; Zhang H; Zhao Z; Zhu S; Zhao Q; Cai W;
Address:		"Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China. Science Island Branch of Graduate School, University of Science and Technology of China, Hefei 230026, China. Shandong Hengcheng Testing Technology Co., Ltd., Yantai 261400, China. School of of Economics and Management (SEM), Weifang University of Science and Technology, Weifang 262700, China"
Journal Title:		Nanomaterials (Basel)
Year:		2023
Volume:		20230706
Issue:		13
Page Number:		-
DOI:		10.3390/nano13132016
ISSN/ISBN:		2079-4991 (Print) 2079-4991 (Electronic) 2079-4991 (Linking)
Abstract:		"Volatile organic compounds (VOCs), particularly monoaromatic hydrocarbon compounds (MACHs), pose a potential risk to the atmospheric environment and human health. Therefore, the progressive development of efficient detection methodologies is a pertinent need, which is still a challenge at present. In this study, we present a rapid and sensitive method to detect trace amounts of MACHs using a bifunctional SERS composite substrate. We prepared an Au/SiO(2) enhanced layer and a porous Cu(OH)(2) adsorption layer via microfluidic-assisted gas-liquid interface self-assembly. The composite substrate effectively monitored changes in benzaldehyde using time-varying SERS spectra, and track-specifically identified various VOCs such as benzene, xylene, styrene, and nitrobenzene. In general, the substrate exhibited a rapid response time of 20 s to gaseous benzaldehyde, with a minimum detection concentration of less than 500 ppt. Further experimental assessments revealed an optimum Cu(OH)(2) thickness of the surrounding adsorption layer of 150 nm, which can achieve an efficient SERS response to MACHs. Furthermore, the recoverable and reusable property of the composite substrate highlights its practicality. This study presents a straightforward and efficient approach for detecting trace gaseous VOCs using SERS, with significant implications in the designing of SERS substrates for detecting other VOCs"
Keywords:		VOCs bifunctional copper hydroxide/gold ordered nanoarray composites fast and sensitive SERS detection recyclable SERS substrate self-assembly;
Notes:		"PubMed-not-MEDLINELu, Yanyan Yuan, Xuzhou Jia, Cuiping Lei, Biao Zhang, Hongwen Zhao, Zhipeng Zhu, Shuyi Zhao, Qian Cai, Weiping eng 52271242, 11974352, 52001305, and 52201167/National Natural Science Foundation of China/ YJKYYQ20210009/the Scientific Instrument Developing Project of the Chinese Academy of Sciences/ YZJJKX202202/HFIPS Director's Fund/ Switzerland 2023/07/14 Nanomaterials (Basel). 2023 Jul 6; 13(13):2016. doi: 10.3390/nano13132016"