In this study, we examined individual bismuth telluride nanowires (NWs) electrodeposited in polycarbonate membranes (PCM) used as sacrificial templates. It has been demonstrated that the composition of Bi2Te3 is controlled by the electrodeposition conditions, e.g. the applied potential. High-resolution transmission electron microscopy (HRTEM) shows that the average grain size of NWs increases with increasing Te content. Our results also reveal that the electrodeposited bismuth telluride NWs are n-type, and their electrical conductivity increases with increasing Te content. These NWs also demonstrated a maximum power factor of 195.8 mW/m·K2 for the Te-rich NW (d = 162 nm) at 300 K.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (2014R1A2A1A10053869), and the Priority Research Centers Program (2009-0093823) and the Pioneer Research Center Program (2013008070) through the NRF.
This work was also supported by the European Union “Fonds Européen de Développement Régional” n° 35962 and the Hubert Curien exchange program STAR 2011 n° 25853NF. The authors thank Dr. E. Toimil-Molares (GSI, Darmstadt, germany) for the ion-track irradiation.
© 2015 Published by Elsevier Ltd.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)