[하찬홍 Lectureship] 1회 수상자 특강 안내 

* 하찬홍 Lectureship :  화학과 58학번 동문인 하찬홍 선생님의 기부(2022년 7월, 1억 원)를 바탕으로 신설된 학술 강연 및 시상 프로그램

1. 강연자: Prof. Mark Ediger(University of Wisconsin-Madison)

 - Ediger 교수는 연질물질과 유리전이 연구 분야에서 세계적인 권위를 가진 연구자로, 그의 연구는 고분자의 동역학적 거동을 분자적 수준에서 심층적으로 이해하는 데 기여

2. 특강 주제 및 내용

Expanding our vision of molecular glasses: Physical vapor deposition prepares ultrastable and anisotropic materials

3. 일시 및 장소

세미나  및 시상식: 2025년 3월 5일(수) 16:30 / 화학관 330118호

4. 문의: 자연과학대학 화학과 행정실 031-290-7060

Expanding our vision of molecular glasses: Physical vapor deposition prepares ultrastable and anisotropic materials

Mark Ediger

University of Wisconsin-Madison

Glasses are non-equilibrium materials and a vast array of amorphous structures are possible in principle.  However, glasses are generally regarded as disordered and the idea of “controlling” molecular packing in glasses is reasonably met with skepticism. We have shown that physical vapor deposition (PVD) produces glasses with properties that cannot be achieved by other preparation routes, including high stability and controlled anisotropy. The exotic properties of PVD glasses can be explained by a surface equilibration mechanism: mobility near the free surface allows substantial equilibration during deposition, even well below the conventional T_g. Our work with organic glasses has now been extended to show aspects of ultrastability in polymeric, metallic, and chalcogenide glasses.

The major application of organic glasses is the production of commercial OLEDs, where PVD is utilized to prepare glassy active layers of organic semiconductors.  It has recently been shown that ultrastable glasses of organic semiconductors make longer-lasting OLEDs.  In addition, the surface equilibration mechanism can be used to control the orientation of emitter molecules, to produce more efficient OLEDs. OLED production often utilizes co-deposition.  We have recently shown that co-deposition of two organic semiconductors can produce a homogeneous ultrastable glass but, in other systems, component separation occurs in the plane of the sample, on a controllable length scale.