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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
21 KI정기세미나 안내-조용훈,전석우,김범준교수 (08.11.11, 16:00~) file 2008.11.07
20 Seminar안내-Dr. Leonard H.Rome(CNSI), 08.11.1 2008.11.07
19 Seminar안내-Dr.Alfred J.Crosby(Univ.of Massachuseetts), 08.10.7 2008.11.07
18 Seminar안내-Dr.Changsoon Kim(Duke Univ.), 08.9.29 file 2008.11.07
17 Seminar안내-Prof. Yoshio Bando(NIMS), 08.8.26 2008.11.07
16 Seminar 안내-김수경박사(Caltech), 08.7.9 2008.11.07
15 Seminar안내-이호성박사(KOSEF), 08.6.26 2008.11.07
14 Seminar안내-진병두박사(KIST), 08.4.7 2008.11.07
13 Seminar 안내 - 전석우박사, Intellecture Ventures 2008.01.21
12 Seminar: Bioseparations and Biosensors in Microfluidic Systems 2007.11.04
» Seminar: Rapid & Controlled Fabrication Process for Fullerene 1-D Crystals 2007.11.04
10 Seminar: Nanotechnology and wireless sensors in life sciences and medicine 2007.11.04
9 Seminar: Continued Growth of Single-Walled Carbon Nanotubes from Open-Ended SWNT 2007.11.04
8 Seminar: New Opportunities in 3D Nanofabrication and Low Dimensional Nanoelectro 2007.11.04
7 Seminar: Flexible Energy Conversion Micro-Cable 2007.11.04
6 Seminar: Carbon Nanotubes and their Potential use in Electronic Devices 2007.11.04
5 Seminar: A Theoretical Model for Digestive Ripening 2007.11.04
4 Seminar: Nano-Bio-Photonics: Photonics-Based Nano and Bio Technology 2007.11.04
3 Seminar: Origami assembly of nanophotonic and energy storage systems 2007.11.04
2 Seminar: Block Copolymer Electrolytes for Lithium Battery Application 2007.11.04
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