Siddhanta, Soumik ; Thakur, Varun ; Narayana, Chandrabhas ; Shivaprasad, S. M. (2012) Universal metal-semiconductor hybrid nanostructured SERS substrate for biosensing ACS Applied Materials & Interfaces, 4 (11). pp. 5807-5812. ISSN 1944-8244
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Official URL: https://pubs.acs.org/doi/abs/10.1021/am302102p
Related URL: http://dx.doi.org/10.1021/am302102p
Abstract
We demonstrate here a novel high surface area GaN nanowall network substrate with plasmonic Ag nanodroplets, that can be employed as a highly sensitive, reproducible and charge independent SERS substrate. The uniformity of the size and distribution of the Ag droplets and the absence of linker ligands result in large near-field intensity, while the GaN nanowall network morphology provides multiple reflections for signal enhancement. FDTD calculations simulate the observed hot-spot distribution and reiterate the higher performance of this hybrid substrate over conventional ones. Our studies on oppositely charged proteins provide a proof of concept for employing this as a versatile charge independent label free SERS substrate for trace biomolecule detection.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
Keywords: | Biomolecule Sensing (Proteins); FDTD; Gan Nanowall Network; Plasmonics; Surface Enhanced Raman Spectroscopy |
ID Code: | 113575 |
Deposited On: | 23 Apr 2018 11:21 |
Last Modified: | 23 Apr 2018 11:21 |
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