Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Plasmonic hollow fibers with distributed inner-wall hotspots for direct SERS detection of flowing liquids

Not Accessible

Your library or personal account may give you access

Abstract

Plasmonic hollow fibers are fabricated by coating silver-/ gold-alloyed nanoparticles (Ag-Au-ANPs) onto the inner walls of hollow fibers. In this Letter, the Ag-Au-ANPs were synthesized chemically and dissolved in acetone to prepare a colloidal solution, flowed subsequently through the hollow fiber multiple times so that a thin layer of colloidal Ag-Au-ANPs was produced on the inner wall. Annealing at 400°C enabled melting/aggregation of the metallic nanoparticles and consequent formation of closely arranged plasmonic nanostructures fixed solidly on the inner wall. A surface-enhanced Raman scattering (SERS) mechanism was thus established for the liquids flowing through the hollows. The SERS measurements show an enhancement factor ${\gt}\!{{10}^4}$ for such plasmonic hollow fibers in the direct detection of R6G/ethanol solutions. Confinement of the excitation laser energy inside the hollow space represents an additional contribution to the enhancement mechanism. This is a promising design for the direct on-site SERS detection of molecules in flowing liquids with low concentrations.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Photothermal microfluidic-assisted self-cleaning effect for a highly reusable SERS sensor

Shaojing Liu, Huiqing Zhong, Zongbao Li, Yu Xu, Xiaowen Hu, Zhidong Zheng, Liu Liu, Pengxin Chen, Xiang Cai, Xiaofang Jiang, Aiping Luo, Jianlin Huang, and Xiaobo Xing
Opt. Lett. 46(19) 4714-4717 (2021)

Enhancing SERS detection on a biocompatible metallic substrate for diabetes diagnosing

Zhiquan Cui, Libin Lu, Yingchun Guan, Seeram Ramakrishna, and Minghui Hong
Opt. Lett. 46(15) 3801-3804 (2021)

Plasmonic alloy nanochains assembled via dielectrophoresis for ultrasensitive SERS

Jun Dong, Kangzhe Zhao, Qianying Wang, Jiaxin Yuan, Qingyan Han, Wei Gao, Yongkai Wang, Jianxia Qi, and Mengtao Sun
Opt. Express 29(22) 36857-36870 (2021)

Supplementary Material (1)

NameDescription
Supplement 1       Figures S1, S2, S3

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved