A new route for the formation of Au nanowires and application of shape-selective Au nanoparticles in SERS studies
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
A new route for the formation of Au nanowires and
application of shape-selective Au nanoparticles in
SERS studies
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| Creator |
Kundu, S.
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| Subject |
Nanotechnology
Electrochemical Materials Science |
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| Description |
A new route for the formation of shape-selective Au nanoparticles (NPs) has been demonstrated. The
reduction of Au(III) ions was done with alkaline 2,7-DHN in CTAB micellar media under 30 min of
continuous UV-irradiation. The reaction results in uniform Au nanospheres and Au nanowires. With the
change in Au(III) ion to CTAB molar ratio, the particles’ size and shape can be tuned. Au nanorods and
nanoprisms are synthesized via seed mediated growth and microwave heating methods and the
particles are characterized by several spectroscopic tools. The shape effects of the four different types of
Au NPs were investigated using surface enhanced Raman scattering (SERS) studies. The results showed
that the SERS intensity increases with the change in NPs’ shape from nanospheres to nanorods to
nanowires to nanoprisms. The highest enhancement observed for the nanoprisms is due to the
presence of a maximum number of sharp edges or surface active rough surfaces compared to the
smooth surfaces of the nanospheres. This high enhancement factor (EF) of these multiple shaped Au
NPs might find potential application in detection of single molecules or in many other fields like
detection of bio-molecules, bioassays, bio-diagnosis or even clinical diagnostics and in medical therapy
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| Publisher |
The Royal Society of Chemistry
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| Date |
2013
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3011/1/041-2013.pdf
Kundu, S. (2013) A new route for the formation of Au nanowires and application of shape-selective Au nanoparticles in SERS studies. Journal of Materials Chemistry C. pp. 831-842. ISSN 0959-9428 |
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| Relation |
http://cecri.csircentral.net/3011/
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