| 학회 | 한국재료학회 |
| 학술대회 | 2015년 봄 (05/14 ~ 05/15, 구미코) |
| 권호 | 21권 1호 |
| 발표분야 | B. 바이오/화학 재료 |
| 제목 | Simple electrochemical synthesis of ultra-long Silver Telluride Nanotubes |
| 초록 | Silver telluride (Ag2Te) is an intriguing phase-change material with a mixed ionic-electronic conductivity in a solid, which exhibits a structural phase transition at 150 oC from a low-temperature monoclinic phase (β-Ag2Te) of narrow bandgap semiconductor to a high-temperature cubic phase (α-Ag2Te) of superionic conductor. Ag2Te have been the subject of research because of their unique physical properties and potential applications such as thermoelectric devise, semiconductor devices and magnetic sensors. Researchers have predicted that one-dimensional (1D) telluride nanostructures, including nanofibers, nanotubes and nanowire-based composites, would be advantageous over their bulk counterparts mainly due to the reduction of lattice thermal conductivity based on the stronger phonon-surface scattering. In this work, we report the facile electrochemical synthesis of ultra-long Ag2Te hollow nanotubes, which could be directly transformed from the electro-spun Ag nanofibers. The electrodepostion of tellurium (Te) on the surface of Ag nanofibers induced the chemical transformation into the Ag2Te nanotubes. Structural and microscopic study demonstrated the morphological and structural changes during the electrochemical transformation. The morphology, composition and crystal structure of Ag2Te nanofibers were investigated by Field emission scanning electron microscope (FE-SEM), Transmission electron microscopy (TEM), X-ray diffraction (XRD) pattern and Energy dispersive X-ray spectroscopy (EDS), respectively. |
| 저자 | Kee-Ryung Park1, Seil Kim1, Sung-Oong Kang1, Nosang V. Myung2, Yong-Ho Choa1 |
| 소속 | 1Hanyang Univ., 2Univ. of California Riverside |
| 키워드 | Silver Telluride; Ag<SUB>2</SUB>Te; Nanotube |
