Towards a nanostructured thermoelectric generator using ion-track lithography
Koukharenko, E., Li, X., Nandhakumar, I., Frety, N., Beeby, S.P., Cox, D, Tudor, M. J., Schiedt, B, Trautmann, C, Bertsch, A and White, Neil M. (2008) Towards a nanostructured thermoelectric generator using ion-track lithography. Journal of Micromechanics and Microengineering, 18, (10), 104015-[9pp]. (doi:10.1088/0960-1317/18/10/104015).
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Description/Abstract
This paper presents the process development towards a new generation of nanostructured thermoelectric generators for power harvesting from small temperature gradients by using a combination of traditional silicon microfabrication techniques, electroplating and submicron ion-track nanolithography. Polyimide nanotemplates with pore diameters ranging from 30 nm to 120 nm were fabricated. Preliminary results from the fabrication of poly(methyl methacrylate) (PMMA)-nanostructured templates are reported. Bi2Te3 nanowires (80 and 120 nm diameters) were electroplated into polyimide ion-track nanotemplates. Bi2Te3 nanowires of a R3 m structure, with preferential orientation in (1 1 0) crystallographic plans, were electroplated. The chemical composition of Bi2Te3 with nearly stoichiometric composition (Bi2.31Te3) was obtained. Homogeneity profiles of the chemical composition were obtained. A fine-grained observed microstructure (6–10 nm) and (1 1 0) crystalline orientation were obtained, which is extremely promising for improving the thermoelectric material properties. The thermoelectric properties of the Bi2Te3-electroplated thin films (Seebeck coefficient α) and electrical resistivity of the Bi2Te3 bundle nanowires were found to be −52 µV K−1 and ~14 MΩ cm, respectively. Polyimide (Kapton foil) and PMMA 950 photoresists were promising materials for the realization of a nanostructured thermoelectric generator on flexible and rigid substrates, respectively.
| Item Type: | Article |
|---|---|
| Related URLs: | |
| Subjects: | Q Science > QC Physics |
| Divisions: | University Structure - Pre August 2011 > School of Chemistry |
| Item ID: | 149345 |
| Date Deposited: | 23 Jun 2010 13:47 |
| Last Modified: | 01 Jun 2011 05:32 |
| Contributors: | Koukharenko, E. (Author) Li, X. (Author) Nandhakumar, I. (Author) Frety, N. (Author) Beeby, S.P. (Author) Cox, D (Author) Tudor, M. J. (Author) Schiedt, B (Author) Trautmann, C (Author) Bertsch, A (Author) White, Neil M. (Author) |
| Date: | 2008 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/149345 |
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