Self-assembled wire-like and honeycomb-like osmium nanoclusters (NCs) in DNA with pronounced catalytic and SERS activities
IR@CECRI: CSIR-Central Electrochemical Research Institute, Karaikudi
View Archive Info| Field | Value | |
| Title |
Self-assembled wire-like and honeycomb-like
osmium nanoclusters (NCs) in DNA with
pronounced catalytic and SERS activities
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| Creator |
Nithiyanantham, U.
Sivasankara Rao , E. Kundu, S. |
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| Subject |
Electrodics and Electrocatalysis
Electrochemical Materials Science |
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| Description |
A new route to the formation of ultra-small Os nanoparticles (NPs) in DNA is reported. The Os NPs that are
initially formed are self-assembled together to form Os nanoclusters (NCs) which have wire-like and
honeycomb-like morphologies. The synthesis was carried out within a minute using microwave heating
by the reaction of Os salt with ethanol. The size of the individual Os NPs varies between 1 and 3 nm and
the synthesized particles are stabilized in DNA. The stable Os NCs showed a coupled SPR band near 600
nm in the visible region, which is useful for using the material as a potential SERS substrate. The SERS
study was carried out using methylene blue (MB) as a model SERS probe molecule and the observed EF
value is �107, which is much higher compared to a recent report for Os NPs. Apart from SERS, the Os
NCs have also been tested in a catalysis reaction. The catalysis reaction was carried out for the first time
for the reduction of organic nitro compounds in the presence of excess NaBH4. The catalytic reaction
rate using Os NCs as a catalyst was found to be superior compared to earlier reports with other metal
NPs, like Au or Ag. The improved catalytic and SERS activities of the Os NCs due to their ultra-small size
with a high surface area might be useful in future in the field of biosensors, biomedicine, nano devices
and other organic catalysis reactions
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| Publisher |
The Royal Society of Chemistry
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| Date |
2014
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cecri.csircentral.net/3090/1/029-2014.pdf
Nithiyanantham, U. and Sivasankara Rao , E. and Kundu, S. (2014) Self-assembled wire-like and honeycomb-like osmium nanoclusters (NCs) in DNA with pronounced catalytic and SERS activities. Journal of Materials Chemistry C, 2. pp. 3782-3794. ISSN 0959-9428 |
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| Relation |
http://www.rsc.org/MaterialsC
http://cecri.csircentral.net/3090/ |
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