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■ 외부초청 세미나

일시: 07.7.18(수) 11:00
연사: 차승일 박사 (NIMS)
제목: Rapid & Controlled Fabrication Process for Fullerene 1-D Crystals

Considering the current application of fullerenes in the field of organic semiconductor devices, the highly crystalline or single crystal fullerene nanostructures with controlled shape and size contains some breakthrough forimproved efficiency.Recently, fullerene 1-D nanostructures, including nanowhiskers and nanotubes, become attractive kind of materials since the development of liquid-liquid interface precipitation (LLIP) process and several published results reports the modification of LLIP process in order to obtain fullerene 1-D nanostructures more rapidly. The LLIP process has critical advantage; the fabrication of highly crystalline, even single crystal, fullerene 1-D nanostructures with simple apparatus. However, thefabrication fullerene 1-D structures by LLIP process requires long process time from one day to several days. In order to overcome this drawback, a modified process from conventional LLIP process is suggested. In the modified LLIP process, the nucleation step and growth step were divided. For the nucleation step, saturated fullerene solution is mixed with small amount of alcohols such as 2-propanol or ethanol. For the controlled growth step, the fullerenes in the nucleated solution are precipitated by addition of alcohol, which is injected to the bottom of the solution with controlled flow rate. In this modified process, the shape of the precipitated fullerene crystals is critically dependent on the nucleation steps and the size is dependent on the precipitation rate. By combination of proper nucleation step and growth rate, a well defined fullerene 1-D structures, of 200~500nm width and of hundreds m length can be fabricated within two hours. In addition, the fabricated fullerene 1-D structures can be formed into the free-standing felt which is remarkably mechanical stable, flexible and even foldable.

List of Articles
번호 제목 날짜
101 오스트리아-한국 나노기술 국제협력을 위한 공동 세미나 개최 file 2019.06.22
100 2019 KINC 미세먼지 Lecture Series (제 3회) file 2019.05.15
99 2019 KINC 미세먼지 Lecture Series (제 2회) file 2019.05.08
98 2019 KINC 미세먼지 Lecture Series (제 1회) file 2019.04.30
97 Prof. Nanshu Lu (University of Texas at Austin) file 2019.03.12
96 Prof. Jianxin Geng, Beijing University of Chemical Technology file 2018.10.01
95 Invited Special Seminar (Prof. Shlomo Magdassi) file 2018.09.05
94 2018 Asian-Nano Symposium on Macromolecules file 2018.03.26
93 [제 3회 KINC 특별 초청 강연 안내]2017.10.23(월) 16시 이조원 한미 나노포럼 조직위원장 file 2017.10.16
92 한미 나노기술 공동연구센터 협력 세미나 /김문재 교수, UT Dallas file 2017.07.07
91 Prof. Timothy P. Lodge, University of Minnesota file 2017.06.26
90 Prof. Jongseung Yoon (University of Southern California) file 2017.06.22
89 Prof. Nicholas A. Kotov (University of Michigan) file 2017.06.22
88 Dr. Won Jun Jo (M.I.T) file 2017.04.28
87 Prof. Andrey L. Rogach / Dr. Stephen V. Kershaw (City University of Hong Kong) file 2016.11.07
86 Prof. Gadi Eisenstein (Director Russell Berrie Nanotechnology Institute) file 2016.11.07
85 KAIST Self-Assembly Symposium 2016 file 2016.11.07
84 Prof. Nicholas A. Kotov (University of Michigan) file 2016.11.07
83 Lerwen LIU, PhD (Managing Director of NanoGlobe Pte Ltd) file 2016.11.07
82 Won Jun Jo (Massachusetts Institute of Technology) file 2016.11.07
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