Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/90119
Title: Plasmonic hotspots in air : an omnidirectional three-dimensional platform for stand-off in-air sers sensing of airborne species
Authors: Phan-Quang, Gia Chuong
Lee, Hiang Kwee
Teng, Hao Wen
Koh, Charlynn Sher Lin
Yim, Barnabas Qinwei
Tan, Eddie Khay Ming
Tok, Wee Lee
Phang, In Yee
Ling, Xing Yi
Keywords: Airborne Molecular Species
DRNTU::Science::Chemistry
Aerosols
Issue Date: 2018
Source: Phan-Quang, G. C., Lee, H. K., Teng, H. W., Koh, C. S. L., Yim, B. Q., Tan, E. K. M., . . . Ling, X. Y. (2018). Plasmonic hotspots in air : an omnidirectional three-dimensional platform for stand-off in-air sers sensing of airborne species. Angewandte Chemie International Edition, 57(20), 5792-5796. doi:10.1002/anie.201802214
Series/Report no.: Angewandte Chemie International Edition
Abstract: Molecular‐level airborne sensing is critical for early prevention of disasters, diseases, and terrorism. Currently, most 2D surface‐enhanced Raman spectroscopy (SERS) substrates used for air sensing have only one functional surface and exhibit poor SERS‐active depth. “Aerosolized plasmonic colloidosomes” (APCs) are introduced as airborne plasmonic hotspots for direct in‐air SERS measurements. APCs function as a macroscale 3D and omnidirectional plasmonic cloud that receives laser irradiation and emits signals in all directions. Importantly, it brings about an effective plasmonic hotspot in a length scale of approximately 2.3 cm, which affords 100‐fold higher tolerance to laser misalignment along the z‐axis compared with 2D SERS substrates. APCs exhibit an extraordinary omnidirectional property and demonstrate consistent SERS performance that is independent of the laser and analyte introductory pathway. Furthermore, the first in‐air SERS detection is demonstrated in stand‐off conditions at a distance of 200 cm, highlighting the applicability of 3D omnidirectional plasmonic clouds for remote airborne sensing in threatening or inaccessible areas.
URI: https://hdl.handle.net/10356/90119
http://hdl.handle.net/10220/48400
ISSN: 1433-7851
DOI: 10.1002/anie.201802214
Rights: This is the peer reviewed version of the following article: Phan-Quang, G. C., Lee, H. K., Teng, H. W., Koh, C. S. L., Yim, B. Q., Tan, E. K. M., . . . Ling, X. Y. (2018). Plasmonic hotspots in air : an omnidirectional three-dimensional platform for stand-off in-air sers sensing of airborne species. Angewandte Chemie International Edition, 57(20), 5792-5796, which has been published in final form at http://dx.doi.org/10.1002/anie.201802214. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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