Use of electrochemical etching to produce doped phenylacetylene functionalized particles and their thermal stability

Ashby, Shane P. and Chao, Yimin ORCID: https://orcid.org/0000-0002-8488-2690 (2014) Use of electrochemical etching to produce doped phenylacetylene functionalized particles and their thermal stability. Journal of Electronic Materials, 43 (6). pp. 2006-2010. ISSN 0361-5235

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Abstract

Silicon is an attractive material for the fabrication of thermoelectric materials. Previously, it was reported that phenylacetylene capped silicon nanoparticles (PA-SiNPs), which were synthesized from micelle reduction, displayed a ZT of up to 0.6 at ambient temperature. The major contributing factor to this result was the material’s low thermal conductivity. However, this material also displayed a low electrical conductivity compared to other thermoelectric materials. This is contributed to, in part, by low charge carrier concentration, which is difficult to control in micelle reduction-based methods. Top–down methods allow control of the carrier concentration as the material is doped prior to the breaking down of the material. PA-SiNPs were synthesized using electrochemical etching followed by functionalization. These particles were then analyzed with transmission electron microscopy (TEM), x-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, thermo-gravimetric analysis (TGA), and differential scanning calorimetry (DSC). The DSC and TGA trace were compared to those of PA-SiNPs synthesized by micelle reduction to show that the thermal stability range is much higher in the particles synthesized from the top–down method giving them a wider range of potential thermoelectric applications.

Item Type:	Article
Uncontrolled Keywords:	silicon,nanoparticles,thermoelectric,phenylacetylene,doping
Faculty \ School:	Faculty of Science > School of Chemistry (former - to 2024) Faculty of Science
UEA Research Groups:	Faculty of Science > Research Groups > Physical and Analytical Chemistry (former - to 2017) Faculty of Science > Research Groups > Chemistry of Materials and Catalysis Faculty of Science > Research Groups > Energy Materials Laboratory
Depositing User:	Pure Connector
Date Deposited:	09 Jun 2014 13:40
Last Modified:	25 Sep 2024 11:16
URI:	https://ueaeprints.uea.ac.uk/id/eprint/48645
DOI:	10.1007/s11664-013-2935-y

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