Issue 75, 2015

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

Abstract

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.

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

Supplementary files

Article information

Article type
Paper
Submitted
28 Jun 2015
Accepted
07 Jul 2015
First published
09 Jul 2015

RSC Adv., 2015,5, 61270-61276

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

W. Li, J. Xue, X. Jiang, Z. Zhou, K. Ren and J. Zhou, RSC Adv., 2015, 5, 61270 DOI: 10.1039/C5RA12487E

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