| 학회 |
한국재료학회 |
| 학술대회 |
2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 |
22권 1호 |
| 발표분야 |
G. 나노/박막 재료 분과 |
| 제목 |
Bismuth Telluride Nanoparticles Physically Grown by the Magnetic Interaction |
| 초록 |
A magnetically assisted physical method has been utilized to synthesize crystalline bismuth telluride (Bi2Te3) nanoparticle arrays. This method simply takes advantage of co-sputtering from Bi2Te3 and cobalt (Co) targets at elevated temperatures. Well-faceted polygonal nanoparticles were obtained from co-sputtering at temperatures above 250 OC. The nanoparticles were analyzed to have a Bi to Te atomic ratio very close to stoichiometric composition of 2 to 3, without any detectable Co. The lateral size of Bi2Te3 nanoparticles ranged from 50 nm to 160 nm, and it generally increased as a function of growth temperature. The power combination applied to Bi2Te3 and Co targets also influenced the size and the morphology of Bi2Te3 nanoparticles. Systematic electron microscopy studies revealed that the Bi2Te3 nanoparticles were distributed on the surface of a growing Bi2Te3 thin film. Both the Bi2Te3 nanoparticles and Bi2Te3 thin films were proven to be highly crystalline by cross-sectional TEM and selected-area electron diffraction analyses. It is inferred that physical mechanisms such as Co agglomeration and kick-off, magnetic interaction between diamagnetic Bi2Te3 and ferromagnetic Co, and Ostwald ripening play in this unique growth method of Bi2Te3 nanoparticles. |
| 저자 |
박종환, 권용원, Nguyen Thanh Son, Yange Luan, 노진서
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| 소속 |
가천대 |
| 키워드 |
Bi<SUB>2</SUB>Te<SUB>3</SUB> nanoparticles; physical method; co-sputtering; magnetic interaction
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| E-Mail |
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