Press Release Archive

  • home_icon HOME
  • News
  • Press Release Archive

Professor Sang-Wook Kim’s research team of the Material Science and Engineering Department has developed a technique, which enables unzipping of the graphene plane without uncontrollable damage. The research findings were published online on the January 22 issue of Nature Communications.

 

Graphene is a form of carbon in which its atoms form a honey-comb structure through chemical bonding. If this structure can be cut to a desired form, other carbon materials with nanostructure can be created. Many researchers have tried to obtain the accurate unzipping of graphene structures, but faced challenges doing so.

 

To break a very strong bond between carbon atoms, an equivalently strong chemical reaction must be induced. But the chemical reaction not only cuts out the desirable borders, but also damages the surrounding ones. Conventional techniques, which cut out graphene at once, damaged the chemical properties of the graphene structure after unzipping. This is similar to wearing out paper while manipulating it.

 

To solve this problem, the research team adopted “heteroatom doping.” The idea is similar to a sheet of paper being split following a groove drawn on the sheet. After making some regions of the structure unstable by doping other atoms such as nitrogen on a carbon plane, the regions are electrochemically stimulated to split the parts. Nitrogen or other atoms act as the groove on the grapheme plane.

 

The researchers finely controlled the amount of unzipping graphene by adjusting the amount of heteroatom dopants, from which they were able to create a quality nano graphene without any damage in its 2-dimensional crystalline structure. Using this technique, the researchers were able to obtain a capacitor with state-of-the-art energy transfer speed. The nano graphene can be combined with polymer, metal, and semiconductor nano molecules to form carbon composites.

 

Professor Kim said, “In order to commercialize this technique, heteroatom doping should be researched further. We plan to develop fabric-like carbon materials with excellent mechanical and electrical properties using this technique.”


Picture 1: Unzipped Carbon Nano Tube
U_20160322170842_371.jpg


Picture 2: Development of Nano Graphene from Carbon Nano Tube Using Heteroatom Dopants

 D_20160322170856_793.jpg


Korean descriptions translated into English:

 

Unzipping Process of Graphene

Carbon Nano Tube → Nano Graphen

Heteroatom

 

This process is similar to a paper being split in two from a tiny hole punched therein.

 


List of Articles
No. Category Subject Author Date Views
35 KINC 최성율 교수 도장 찍듯이 자유롭게 그래핀 옮기는 기술 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 8571
34 KIITC 초슬림 휴대폰 나온다 [2012-01-12] file KAIST_INSTITUTE 2016.06.10 4682
33 KINC 조병진, 임성갑, 유승협 교수 휘어지는 10나노미터 고분자 절연막 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 8227
32 KINC 전기적 자기적 성질 동시에 갖는 신물질 물성 규명 [2012-01-17] file KAIST_INSTITUTE 2016.06.10 7292
31 KIHST 이제는 세포 내부도 훤히 들여다본다 [2012-01-27] file KAIST_INSTITUTE 2016.06.10 4991
30 KIB 이상엽, 정하웅 교수팀, 가상세포로 필수대사물질 발굴, 간겅성 문제 규명 [2007-08-16] file KAIST_INSTITUTE 2016.06.08 5409
29 Others 융합연구기획과제 성과 - 대학 캠퍼스 내 실내외 통합 내비게이션 개발 [2015-09-17] file KAIST_INSTITUTE 2016.06.10 9580
28 KINC 보다 태양빛에 가까운 LED 개발 [2012-01-12] file KAIST_INSTITUTE 2016.06.10 6936
27 KIITC 박인규 교수, 공기오염 측정 센서 원천기술 개발 [2015-08-05] file KAIST_INSTITUTE 2016.06.10 5912
26 KIR 대한민국 특허왕 이대길 교수, 올해의 KAIST인에 선정 [2009-11-23] file KAIST_INSTITUTE 2016.06.09 5619
25 KIR Won the Outstanding Indistry-cooperation Awardby Hyundai Motor Company [2011-12-13] file KAIST_INSTITUTE 2016.06.10 5680
24 Others Won the NAS Award (National Academy of Science Award) file KAIST_INSTITUTE 2016.06.09 4389
23 KIITC Won the Largh-scale Convergence Project Contract [2012-01-12] file KAIST_INSTITUTE 2016.06.10 8542
22 KIHST Ultrashort EUV Pulses generation using high harmonic generation by plasmonic field enhancement [2012-01-12] file KAIST_INSTITUTE 2016.06.10 22539
21 KIITC Technology Transfer for Powerless/ wireless Keyboard [2010-07-20] file KAIST_INSTITUTE 2016.06.09 5740
20 Others Synthesis of Calcium Crystals on Any Material Surfaces is Developed [2010-07-20] file KAIST_INSTITUTE 2016.06.09 5087
19 KIB Professor Sang-Yup Lee Named Senior Editor of U.S. Biotechnology Journal [2007-02-07] KAIST_INSTITUTE 2016.06.08 12304
18 KIB Prof. Sang-Yup Lee's Team Pioneers Biotechnological Production of Chemical Using Renewable Materials [2009-11-02] KAIST_INSTITUTE 2016.06.09 21093
17 KIR Prof. Jung Kim's project has been selected to the research project for Public Welfare Safety [2010-08-16] KAIST_INSTITUTE 2016.06.10 5023
16 KIHST Next-generation Holographic Microscope for 3D Live Cell Imaging [2016-03-29] file KAIST_INSTITUTE 2016.06.18 50008
Board Pagination Prev 1 2 Next
/ 2

KAIST 291 Daehak-ro, Yuseong-gu, Daejeon (34141)
T : +82-42-350-2381~2384
F : +82-42-350-2080
Copyright (C) 2015. KAIST Institute