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Published in: Colloid and Polymer Science 6/2023

31-03-2023 | Original Contribution

Gold nanorods coated by molecularly imprinted polymer for sensitive and specific SERS detection of dyes

Authors: Mai Tuyet Thi Nguyen, Lan Thi Dang, Hai Van Pham

Published in: Colloid and Polymer Science | Issue 6/2023

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Abstract

Although surface-enhanced Raman scattering (SERS) is an advanced analysis technique, the challenge of low specificity in real sample analysis remains. In this study, we synthesized a hybrid structure based on gold nanorods (AuNRs) coated with a molecularly imprinted polymer (MIP) as a SERS substrate. While the AuNRs strongly enhance the Raman signal of the analyte, the MIP layer allows specific trapping of analyte molecules close to the gold surface. A very thin film of polydopamine with exclusive cavities of rhodamine B enabled ultrasensitive detection of rhodamine B with a 120-fold increase compared to non-imprinted sample. The selectivity of our AuNR@MIP substrate for the detection of rhodamine B in a mixture of different dyes was also clearly improved. Fortunately, the AuNR@MIP substrate exhibited attractive accuracy and sensitivity toward rhodamine B in spiked orange juice samples. This report demonstrates a promising hybrid structure to improve SERS-based sensing of real samples.

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Metadata
Title
Gold nanorods coated by molecularly imprinted polymer for sensitive and specific SERS detection of dyes
Authors
Mai Tuyet Thi Nguyen
Lan Thi Dang
Hai Van Pham
Publication date
31-03-2023
Publisher
Springer Berlin Heidelberg
Published in
Colloid and Polymer Science / Issue 6/2023
Print ISSN: 0303-402X
Electronic ISSN: 1435-1536
DOI
https://doi.org/10.1007/s00396-023-05097-y

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