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Active Control of Silver Nanostructure Aggregates for Ultrahigh Sensitive SERS Detection of Organic Molecules: Single Molecule Approach

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Main Authors: Mehdi, Q. Z, Alwan, M. Alwan
Other Authors: mehdiqasim2@gmail.com
Format: Article
Language:English
Published: Universiti Malaysia Perlis (UniMAP) 2019
Subjects:
SERS
Porous silicon
Silver nanostructure aggregates
Crypto cyanine dye
Online Access:http://dspace.unimap.edu.my:80/xmlui/handle/123456789/58776
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spelling my.unimap-587762019-03-06T08:48:55Z Active Control of Silver Nanostructure Aggregates for Ultrahigh Sensitive SERS Detection of Organic Molecules: Single Molecule Approach Mehdi, Q. Z Alwan, M. Alwan mehdiqasim2@gmail.com SERS Porous silicon Silver nanostructure aggregates Crypto cyanine dye Link to publisher's homepage at http://ijneam.unimap.edu.my P-type and n-type of Porous Silicon (PSi) substrates have been prepared by electrochemical and photo-electrochemical etching processes, respectively. Unique morphological features of Psi were employed to synthesis efficient and low cost Surface-Enhanced Raman Scattering (SERS) active substances by incorporating different forms of silver nanoparticles AgNPs. Ion reduction process of silver ions by three types of PSi samples was used to develop AgNPs, Ag cluster, and Ag loop aggregates-based active SERS substrates for efficient detection of Cy3 dyes molecules. The performances of the active SERS substrates were studied extensively through analysis of scanning electron microscopy and Raman spectra. The results show that the detection process of Cy3 dyes molecules was increased with increasing the density of hot spot's regions. The developed AgNPs aggregate/p-PSi substrate with the smallest inter-particle gap size exhibits the strongest SERS enhancement and produced the best reproducibility as compared with the other two substrates. The amplified Raman efficiencies for AgNPs aggregate/p-PSi, Ag cluster aggregate/n-PSi, and Ag loop aggregate/n2-PSi substrates were calculated to be 1010, 106, and 103, respectively. The experimental results show that the AgNPs aggregate/p-PSi SERS substrate exhibited significant enhancement factor of 1.07 × 1013 for 10-14 M dye concentration using single molecule detection technique 2019-03-06T08:47:51Z 2019-03-06T08:47:51Z 2019-01 Article International Journal of Nanoelectronics and Materials, vol.12(1), 2019, pages 55-66 1985-5761 (Printed) 1997-4434 (Online) http://dspace.unimap.edu.my:80/xmlui/handle/123456789/58776 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 SERS
Porous silicon
Silver nanostructure aggregates
Crypto cyanine dye
spellingShingle SERS
Porous silicon
Silver nanostructure aggregates
Crypto cyanine dye
Mehdi, Q. Z
Alwan, M. Alwan
Active Control of Silver Nanostructure Aggregates for Ultrahigh Sensitive SERS Detection of Organic Molecules: Single Molecule Approach
description Link to publisher's homepage at http://ijneam.unimap.edu.my
author2 mehdiqasim2@gmail.com
author_facet mehdiqasim2@gmail.com
Mehdi, Q. Z
Alwan, M. Alwan
format Article
author Mehdi, Q. Z
Alwan, M. Alwan
author_sort Mehdi, Q. Z
title Active Control of Silver Nanostructure Aggregates for Ultrahigh Sensitive SERS Detection of Organic Molecules: Single Molecule Approach
title_short Active Control of Silver Nanostructure Aggregates for Ultrahigh Sensitive SERS Detection of Organic Molecules: Single Molecule Approach
title_full Active Control of Silver Nanostructure Aggregates for Ultrahigh Sensitive SERS Detection of Organic Molecules: Single Molecule Approach
title_fullStr Active Control of Silver Nanostructure Aggregates for Ultrahigh Sensitive SERS Detection of Organic Molecules: Single Molecule Approach
title_full_unstemmed Active Control of Silver Nanostructure Aggregates for Ultrahigh Sensitive SERS Detection of Organic Molecules: Single Molecule Approach
title_sort active control of silver nanostructure aggregates for ultrahigh sensitive sers detection of organic molecules: single molecule approach
publisher Universiti Malaysia Perlis (UniMAP)
publishDate 2019
url http://dspace.unimap.edu.my:80/xmlui/handle/123456789/58776
_version_ 1643805991916011520
score 13.222552

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