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Optimizing plasmonic characteristics of Ag-AuNPs/Nanohillocks Si Heterostructures for efficient SERS performance

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Main Authors: Alwan, M. Alwan, Mohammed, S. Mohammed, Russul, M. Shehab
Other Authors: russullaser@yahoo.com
Format: Article
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2020
Subjects:
Nanohillocks Silicon
KOH Chemical Etching
SERS
Plasmonic Characteristic
Ag-AuNPs
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/65168
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spelling my.unimap-651682020-06-23T04:41:12Z Optimizing plasmonic characteristics of Ag-AuNPs/Nanohillocks Si Heterostructures for efficient SERS performance Alwan, M. Alwan Mohammed, S. Mohammed Russul, M. Shehab russullaser@yahoo.com Nanohillocks Silicon KOH Chemical Etching SERS Plasmonic Characteristic Ag-AuNPs Link to publisher's homepage at http://ijneam.unimap.edu.my Tunable bimetallic Ag-Au nanoparticles (Ag-AuNPs) and hot spot regions were created through the reduction of Ag-Au ions onto nanohillock silicon surfaces. A set of as-prepared textured silicon substrates with different nanohillock topographies was synthesised by a wet potassium hydroxide (KOH) chemical etching process on crystalline silicon for incubation times from 4 to 10 min. These structures were explored as a substrate for optimizing the plasmonic characteristics of Ag-AuNPs/nanohillocks Si surface-enhanced Raman scattering (SERS) heterostructures. The goal of this paper is to create sufficient SERS heterostructures with a high enhancement and exceptional reproducibility. The nanohillock Si substrate was employed to create nearly homogeneously distributed Ag-AuNPs and hot spot regions with extraordinary specific surface area (S.S.A.) values. Plasmonic characteristics of the created Ag-AuNPs were investigated and analysed based on the surface features of the substrate via atomic force microscopy (AFM), field emission scanning electron microscopy (FE-SEM), X-ray diffraction spectroscopy (XRD), energy-dispersive X-ray spectroscopy (EDS) and Raman measurements. Tunable Ag-AuNPs sizes and hot spot regions were synthesized by controlling the incubation time of the wet KOH chemical etching process. The density and size distribution, and hence the plasmonic characteristics of the Ag-AuNPs and hot spot regions, were improved significantly with increasing surface roughness and average hillock height of the substrate and specific surface area of the Ag-AuNPs. A high enhancement factor of 3.7×1013 with a minimum reproducibility deviation of about 4% was attained in 10−14 M rhodamine 6G dye for an 8 min etching incubation time. 2020-06-23T04:41:12Z 2020-06-23T04:41:12Z 2020-04 Article International Journal of Nanoelectronics and Materials, vol.13(2), 2020, pages 323-340 1985-5761 (Printed) 1997-4434 (Online) http://dspace.unimap.edu.my:80/xmlui/handle/123456789/65168 http://ijneam.unimap.edu.my en Universiti Malaysia Perlis (UniMAP)
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Nanohillocks Silicon
KOH Chemical Etching
SERS
Plasmonic Characteristic
Ag-AuNPs
spellingShingle Nanohillocks Silicon
KOH Chemical Etching
SERS
Plasmonic Characteristic
Ag-AuNPs
Alwan, M. Alwan
Mohammed, S. Mohammed
Russul, M. Shehab
Optimizing plasmonic characteristics of Ag-AuNPs/Nanohillocks Si Heterostructures for efficient SERS performance
description Link to publisher's homepage at http://ijneam.unimap.edu.my
author2 russullaser@yahoo.com
author_facet russullaser@yahoo.com
Alwan, M. Alwan
Mohammed, S. Mohammed
Russul, M. Shehab
format Article
author Alwan, M. Alwan
Mohammed, S. Mohammed
Russul, M. Shehab
author_sort Alwan, M. Alwan
title Optimizing plasmonic characteristics of Ag-AuNPs/Nanohillocks Si Heterostructures for efficient SERS performance
title_short Optimizing plasmonic characteristics of Ag-AuNPs/Nanohillocks Si Heterostructures for efficient SERS performance
title_full Optimizing plasmonic characteristics of Ag-AuNPs/Nanohillocks Si Heterostructures for efficient SERS performance
title_fullStr Optimizing plasmonic characteristics of Ag-AuNPs/Nanohillocks Si Heterostructures for efficient SERS performance
title_full_unstemmed Optimizing plasmonic characteristics of Ag-AuNPs/Nanohillocks Si Heterostructures for efficient SERS performance
title_sort optimizing plasmonic characteristics of ag-aunps/nanohillocks si heterostructures for efficient sers performance
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2020
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/65168
_version_ 1674067689154281472
score 13.222552

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