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- Title
Plasmonic Liquid Marbles: A Miniature Substrate-less SERS Platform for Quantitative and Multiplex Ultratrace Molecular Detection.
- Authors
Lee, Hiang Kwee; Lee, Yih Hong; Phang, In Yee; Wei, Jiaqi; Miao, Yue-E; Liu, Tianxi; Ling, Xing Yi
- Abstract
Inspired by aphids, liquid marbles have been studied extensively and have found application as isolated microreactors, as micropumps, and in sensing. However, current liquid-marble-based sensing methodologies are limited to qualitative colorimetry-based detection. Herein we describe the fabrication of a plasmonic liquid marble as a substrate-less analytical platform which, when coupled with ultrasensitive SERS, enables simultaneous multiplex quantification and the identification of ultratrace analytes across separate phases. Our plasmonic liquid marble demonstrates excellent mechanical stability and is suitable for the quantitative examination of ultratrace analytes, with detection limits as low as 0.3 fmol, which corresponds to an analytical enhancement factor of 5×108. The results of our simultaneous detection scheme based on plasmonic liquid marbles and an aqueous-solid-organic interface quantitatively tally with those found for the individual detection of methylene blue and coumarin.
- Subjects
APHIDS; MICROREACTORS; METHYLENE blue; COUMARINS; COLORIMETRY; ULTRATRACE analysis
- Publication
Angewandte Chemie International Edition, 2014, Vol 53, Issue 20, p5054
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201401026