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ACS Nano

Title:		Tracking Airborne Molecules from Afar: Three-Dimensional Metal-Organic Framework-Surface-Enhanced Raman Scattering Platform for Stand-Off and Real-Time Atmospheric Monitoring
Author(s):		Phan-Quang GC; Yang N; Lee HK; Sim HYF; Koh CSL; Kao YC; Wong ZC; Tan EKM; Miao YE; Fan W; Liu T; Phang IY; Ling XY;
Address:		"Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371. Department of Materials Science and Engineering , Stanford University , Stanford , California 94305 , United States. Technospex Pte Ltd. , 1092 Lower Delta Road, No. 04-01 Tiong Bahru Industrial Estate , Singapore 169203. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Innovation Center for Textile Science and Technology , Donghua University , 2999 North Renmin Road , Shanghai 201620 , P.R. China. Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering , Jiangnan University , 1800 Lihu Avenue , Wuxi 214122 , Jiangsu , P.R. China. Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR) , 2 Fusionopolis Way, Innovis, No. 08-03 , Singapore 138634"
Journal Title:		ACS Nano
Year:		2019
Volume:		20190919
Issue:		10
Page Number:		12090 - 12099
DOI:		10.1021/acsnano.9b06486
ISSN/ISBN:		1936-086X (Electronic) 1936-0851 (Linking)
Abstract:		"Stand-off Raman spectroscopy combines the advantages of both Raman spectroscopy and remote detection to retrieve molecular vibrational fingerprints of chemicals at inaccessible sites. However, it is currently restricted to the detection of pure solids and liquids and not widely applicable for dispersed molecules in air. Herein, we realize real-time stand-off SERS spectroscopy for remote and multiplex detection of atmospheric airborne species by integrating a long-range optic system with a 3D analyte-sorbing metal-organic framework (MOF)-integrated SERS platform. Formed via the self-assembly of Ag@MOF core-shell nanoparticles, our 3D plasmonic architecture exhibits micrometer thick SERS hotspot to allow active sorption and rapid detection of aerosols, gas, and volatile organic compounds down to parts-per-billion levels, notably at a distance up to 10 m apart. The platform is highly sensitive to changes in atmospheric content, as demonstrated in the temporal monitoring of gaseous CO(2) in several cycles. Importantly, we demonstrate the remote and multiplex quantification of polycyclic aromatic hydrocarbon mixtures in real time under outdoor daylight. By overcoming core challenges in current remote Raman spectroscopy, our strategy creates an opportunity in the long-distance and sensitive monitoring of air/gaseous environment at the molecular level, which is especially important in environmental conservation, disaster prevention, and homeland defense"
Keywords:		airborne sensing plasmonic nanoparticles real-time monitoring stand-off detection surface-enhanced Raman scattering;
Notes:		"PubMed-not-MEDLINEPhan-Quang, Gia Chuong Yang, Ningchen Lee, Hiang Kwee Sim, Howard Yi Fan Koh, Charlynn Sher Lin Kao, Ya-Chuan Wong, Zhao Cai Tan, Eddie Khay Ming Miao, Yue-E Fan, Wei Liu, Tianxi Phang, In Yee Ling, Xing Yi eng 2019/09/14 ACS Nano. 2019 Oct 22; 13(10):12090-12099. doi: 10.1021/acsnano.9b06486. Epub 2019 Sep 19"