Synthesis of Nanocomposites Using Glasses and Mica as Templates
IR@IICB: CSIR-Indian Institute of Chemical Biology, Kolkata
View Archive Info| Field | Value | |
| Title |
Synthesis of Nanocomposites Using Glasses and Mica as Templates
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| Creator |
Chakrovorty, D
Basu, S Pal, B N Mukherjee, P K Ghosh, B Chatterjee, K Bose, A Bhattacharya, S Banerjee, Asish |
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| Subject |
Chemistry
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| Description |
Various nanocomposites were synthesized using either a silica-based glass or mica crystallites as
the medium. In some cases by an oxidation or a sulfidation treatment a core-shell nanostructure could be generated.
Iron–iron oxide core-shell structured nanocomposites exhibited excellent humidity sensing behaviour.
Gold–gold sulfide core-shell nanorods exhibited a number of optical absorption peaks which arose because of
their structural characteristics. Nanoparticles of silver and silver oxide could be aligned in a polymethylmethacrylate
film by an a.c. electric field of 1 MHz frequency. The composites showed large sensitivity to relative
humidity. Lead sulfide nanowires of diameter, 1⋅2 nm, were grown within the nanochannels of Na-4 mica.
These exhibited a semiconductor to metal transition at around 300 K. This arose because of high pressure
generated on the nanowires. Copper sulfide nanowires grown within the Na-4 mica channels showed metallic
behaviour. Silver core–silver orthosilicate shell nanostructures developed within a silicate glass medium
showed discontinuous changes in resistivity at some specific temperatures. This was explained as arising due
to excitation of Lamb modes at certain pressures generated because of thermal expansion mismatch of the
core and the shell phases. Optical properties of iron core–iron oxide shell nanocomposites when analysed by
effective medium theory led to the result of a metal non-metal transition for particle diameters below a critical
value. Similar results were obtained from optical absorption data of silver nanoparticles grown in a tetrapeptide
solution.
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| Date |
2008
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://www.eprints.iicb.res.in/300/1/BULLETIN_OF_MATERIALS_SCIENCE%2C31(3)%2C263%2D276%2C2008[78].pdf
Chakrovorty, D and Basu, S and Pal, B N and Mukherjee, P K and Ghosh, B and Chatterjee, K and Bose, A and Bhattacharya, S and Banerjee, Asish (2008) Synthesis of Nanocomposites Using Glasses and Mica as Templates. Bulletin of Materials Science, 31 (3). pp. 263-276. |
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| Relation |
http://dx.doi.org/10.1007/s12034-008-0044-y
http://www.eprints.iicb.res.in/300/ |
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