NDLI: Enhanced Raman Scattering of 2,4,6-TNT Using Metallic Colloids

Content Provider	IEEE Xplore Digital Library
Author	Jerez-Rozo, J.I. Primera-Pedrozo, O.M. Barreto-Caban, M.A. Hernandez-Rivera, S.P.
Copyright Year	2001
Abstract	Surface-enhanced Raman scattering (SERS) combines extremely high sensitivity, due to enhanced Raman cross sections comparable or even better than fluorescence emission. The observation of vibrational spectra of adsorbed species on nanoparticles, provides one of the most incisive analytical methods for chemical and biochemical detection and analysis. Nanoparticles are of fundamental interest since they possess unique size-dependent properties (optical, electrical, mechanical, chemical, magnetic, etc.), which are quite different from the bulk and the atomic state. Bimetallic nanoparticles are of particular interest since they combine the advantages of the individual monometallic counterparts. Metal colloids have become the most commonly used nanostructures for SERS. The present study focuses on the use of metallic nanoparticles, with a particle size of 35-80 nm for detecting TNT in solution. Gold, silver, and Au/Ag colloids were synthesized by chemical reduction methods, and used for detecting TNT in solution with high sensitivity and molecular specificity. The nanoparticles were characterized with UV-VIS spectroscopy, Scanning and Transmission Electron Microscopies and Raman Spectroscopy. The detection of TNT was conducted via an indirect method that involved the alkaline hydrolysis of TNT in the presence of a strong base. This method offered the advantage of generating reaction products that provided enhanced detection in the SERS experiments. The spectra were obtained in the 100-3500 cm^-1 range. The results revealed an increase in the intensity of the vibrational signals, attributed to the SERS spectra of TNT degradation products. Bands associated with out-of-plane bending modes centered at 820 and 850 cm^-1 and symmetric and asymmetric stretching modes were detected.
Sponsorship	IEEE Sensors Council
Starting Page	974
Ending Page	982
Page Count	9
File Size	1735600
File Format	PDF
ISSN	1530437X
Volume Number	8
Issue Number	6
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Raman scattering Nanoparticles Spectroscopy Vibrations Biochemical analysis Magnetic analysis Atom optics Chemicals Gold Fluorescence 2,4,6-TNT Alkaline hydrolysis gold and silver/gold colloids silver surface-enhanced Raman scattering (SERS)
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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