ANYL 338 |
| Metal nanorods represent an interesting class of nanomaterials with fascinating size dependent optical, electronic, and mechanical properties. In addition, gold and silver nanorods have found use for Raman and fluorescence enhancement as well as in plasmonics applications. Our research involves the direct synthesis of gold and silver nanorods on surfaces by chemical reduction of the corresponding salt by ascorbic acid onto surface-attached seed particles in the presence of cetyltrimethylammonium bromide (CTAB). This serves as a simple and straightforward method for assembling nanorods on surfaces. Patterning the seed particles leads to patterned nanorods and surface functionalization results in highly-aligned nanorods grown directly on surfaces. Patterning and alignment are critical issues for most applications. Our work extends to the growth and alignment of silver nanorods on surfaces. Galvanic place-exchange of silver nanorods with other metals (Pd, Pt, and Au) allows the formation of interesting metal and alloy one-dimensional nanostructures applicable to catalysis and sensing. Preliminary work on the electronic properties of individual nanorods shows that they may be useful for electronic-based sensing. |
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Analytical Approaches: Novel Materials
1:30 PM-4:40 PM, Thursday, 14 September 2006 Moscone Center -- Room 130, Oral
Division of Analytical Chemistry |