Gold nanoparticle-functionalized thread as a substrate for SERS study of analytes both bound and unbound to gold

Gold nanoparticle-functionalized thread as a substrate for SERS study of analytes both bound and unbound to gold

The potential of thread for use as a substrate for inexpensive, disposable diagnostics for surface‐enhanced Raman scattering (SERS) spectroscopy has been showed in this study. Gold‐nanoparticle coated thread can be embedded into fabrics to detect chemical or biological analytes in military and medic...

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Bibliographic Details
Published in:AIChE journal Vol. 60; no. 5; pp. 1598 - 1605
Main Authors: Ballerini, David R., Ngo, Ying H., Garnier, Gil, Ladewig, Bradley P., Shen, Wei, Jarujamrus, Purim
Format: Journal Article
Language:English
Published: New York Blackwell Publishing Ltd 01-05-2014
American Institute of Chemical Engineers
Subjects:
Amplification
Bonding
Gold
gold nanoparticles
Military
Molecular structure
Nanoparticles
Nanostructure
Raman enhancement
Raman scattering
Scattering
Substrates
surface-enhanced Raman scattering
thread-based diagnostics
unbound molecules
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Summary:The potential of thread for use as a substrate for inexpensive, disposable diagnostics for surface‐enhanced Raman scattering (SERS) spectroscopy has been showed in this study. Gold‐nanoparticle coated thread can be embedded into fabrics to detect chemical or biological analytes in military and medical applications through SERS. Using this inexpensive and widely available material enables reduction in the volumes of nanoparticle solution required compared to alternatives. By testing multiple analytes, it was observed that molecular structure played a significant role in SERS signal amplification, and hence, the technique is limited to the detection of a small number of analytes possessing highly polarizable structures. Although direct chemical bonding between analyte molecules and nanoparticles gives the strongest signal enhancement, it remains possible to easily discern signals generated by analytes not directly bound, provided they possess suitable structure. Amplification of SERS signal by controlling the aggregation state of the gold nanoparticles to increase the number of SERS hotspots was observed. © 2014 American Institute of Chemical Engineers AIChE J, 60: 1598–1605, 2014
Bibliography:ark:/67375/WNG-6DTQQVFH-G
Australian Research Council Grant - No. ARC DP1094179; No. ARC LP0990526
istex:E7DECD6925050AC96FAC707038A79BE896CC0658
Royal Golden Jubilee PhD Program (RGJ)
ArticleID:AIC14398
Center of Excellence for Innovation in Chemistry (PERCH−CIC), Commission on Higher Education, Ministry of Education
Thailand Research Fund (TRF)
David R. Ballerini and Ying H. Ngo contributed equally as co‐first authors.
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ISSN:0001-1541
1547-5905
DOI:10.1002/aic.14398