Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Low-cost replication of plasmonic gold nanomushroom arrays for transmission-mode and multichannel biosensing

Language

English

Abstract

© The Royal Society of Chemistry 2015. A plasmonic gold nanomushroom array (GNMA), whose figure of merit (FOM) is close to the theoretically predicted upper limit for standard propagating surface plasmon resonance (PSPR) sensors, made the biosensing performance of this type of LSPR sensor comparable to that of commercial PSPR sensors. However, for commercial implementation of GNMA sensors, a low-cost fabrication method and a simple optical measurement scheme are both urgently required. Herein, we introduce elastic soft lithography to replicate GNMAs with uniform shapes and sizes. This approach is low-cost, facile and reproducible, and might be suitable for industrial production of a mushroom nanopillar array whose tops are larger than their middles. The as-obtained GNMAs consisting of a transparent substrate were applied to convenient normal transmission measurements, and showed excellent refractive index sensitivity and FOM value. Notably, four medical analytes were simultaneously detected on a microarray chip integrated with a GNMA sensing component, suggesting that the GNMA sensing substrate is a promising candidate for high-throughput monitoring of multiple analytes.

Publication Date

2015

Source Publication Title

RSC Advances

Volume

5

Issue

75

Start Page

61270

End Page

61276

Publisher

Royal Society of Chemistry

DOI

10.1039/C5RA12487E

Link to Publisher's Edition

http://dx.doi.org/10.1039/C5RA12487E

ISSN (electronic)

20462069

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