신소재공학과

행사일 20160930 

▣ 특 별 세 미 나 ▣

 

- 제 목Control of molecular orientation, thermal stability, and photochemical stability in vapor-deposited organic glasses

 

- 연 사: Mark Ediger (University of Wisconsin-Madison / Department of Chemistry)

 

- 일 시: 2016 9 30(오후 4

 

- 장 소: 응용공학동 (W1) 1 영상강의실

 

- 추 천김상욱 교수


- 초 록We have used physical vapor deposition and the mobility of glassy surfaces to prepare what are likely the most stable glasses on the planet.(1) These materials have the properties expected for million-year-old glasses, including high density and high mechanical moduli.(2) Surprisingly, these glasses melt like crystals, with a constant velocity transformation front.(3) In addition, they resist photochemical degradation better than liquid-cooled glasses. Molecular orientation in vapordeposited glasses can be highly anisotropic.(4) These properties all depend systematically on the substrate temperature during deposition and can be measured efficiently with high throughput spectroscopic ellipsometry.(5)

 

The interesting properties of vapor-deposited glasses arise from the high mobility of glass surfaces. During deposition, molecules near the free surface have the opportunity to sample many different packing arrangements. This mechanism allows the molecular orientation in vapor-deposited glasses to be predicted from molecular dynamics computer simulations(4, 6) and could be useful for optimizing the performance of organic light emitting diodes (OLEDs).

No. Subject Author Date Views
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202 10/18(화) 가와사키 메구미 교수 (한양대학교 신소재공학부) ADMINI 2016.10.17 318
201 10/11(화) 특별 세미나 안내 (Prof. Leon Abelmann, KIST Europe) ADMINI 2016.10.07 324
200 10/4(화) 노준석 교수 (포항공과대학교 기계공학과/화학공학과) ADMINI 2016.10.04 336
199 10/4(화) KAIST Self-Assembly Symposium 2016 file ADMINI 2016.09.30 343
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197 9/27(화) 신성태 교수 (고려대학교 세종캠퍼스 디스플레이•반도체물리학과) ADMINI 2016.09.23 395
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195 9/6 (화) 박승용 교수 (The Nelson Mandela African Institution of Science and Technology, Head of the Department of Materials and Energy Science and Engineering) ADMINI 2016.08.29 437
194 8/23(화) 특별세미나 안내 (김지환 교수, MIT) ADMINI 2016.08.22 388
193 8/2(화) KAIST International MSE Workshop 2016 ADMINI 2016.07.25 442
192 6/15(수) 특별세미나 안내 (박찬호 교수, GIST) ADMINI 2016.06.10 429
191 6/14(화) 임혜인 교수 (숙명여자대학교 물리학과) ADMINI 2016.06.09 468
190 6/7(화) 권순구 박사 (서울대학교 나노입자연구단 및 기초과학연구원 영 사이언티스트 펠로우) ADMINI 2016.06.02 422
189 5/31(화) 황동목 교수 (성균관대 신소재공학부) ADMINI 2016.05.27 458
188 6/8(수) 특별 세미나 안내 (Prof. Sunghwan Lee, Dept. of Mechanical Engineering, Baylor University) file ADMINI 2016.05.25 364
187 5/17(화) 박진성 교수 (한양대 신소재공학부) ADMINI 2016.05.12 559
186 5/10(화) 한세광 교수 (포스텍 신소재공학과) ADMINI 2016.05.05 479
185 5/3(화) 김광호 교수 (부산대학교 신소재공학과) ADMINI 2016.04.29 529
184 4/19(화) 김대수 교수 (KAIST 생명과학과) ADMINI 2016.04.15 651