| 학회 |
한국화학공학회 |
| 학술대회 |
2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 |
28권 1호 |
| 발표분야 |
[주제 9] 에너지 전환 |
| 제목 |
Local phase transition at crack edges of Mo1-xWxTe2 polymorphs |
| 초록 |
Phase engineering of two-dimensional(2D) materials has received a lot of attention, however, the intensive studies have been limited because of difficulties to probe nanometer-scale samples with macroscopic experimental techniques. We report on a nanometer-scale probe of the phase transition between the semiconductor 2H phase and the metal 1T′ phase of the Mo1-xWxTe2 alloys. We found that as W atoms accumulate, cracks of it increase at corners. Also, the crystallinity of mechanically exfoliated 2H-Mo1-xWxTe2 flakes are weakened. With mild laser irradiation of 2H-Mo1-xWxTe2 flakes, we observe phase transition at the edge and other areas. And we found phase transition according to the accumulation amount of W atoms. Our study clarifies the role of atomic structures on the crystallinity of two-dimensional materials based on heterophase structures and enables energy conversion-storage and application to optoelectronic devices. |
| 저자 |
임은지1, 이하흔1, 강서희1, Yonas Assefa Eshete2, 원동연2, 이용준3, 정주영3
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| 소속 |
1이화여자대, 2성균관대, 3KAIST |
| 키워드 |
재료(Materials) |
| E-Mail |
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| 원문파일 |
초록 보기 |
