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  • 02월 26일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제115회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Facile synthesis of 2D polyaniline nanosheets on ice surfaces

2015년 2월 9일 23시 54분 18초
POLY.O-8 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 11시 : 45분
고분자화학 - General Oral Presentation
저자 및
최일영, 박문정1,*
포항공과대학교(POSTECH) 첨단재료과학부, Korea
1포항공과대학교(POSTECH) 화학과, Korea
Polyaniline (PANI) has widely been studied as one of promising conducting polymers for uses in a range of electrochemical devices. Good environmental/chemical stability, high electrical conductivity, and easy of synthesis have been highlighted as desirable characteristics of PANI towards future electronic materials. Decades of research on PANI have further revealed that the electrical properties of PANI can be largely tailored by changing the dimensionality of nanostructures. This imprinted the importance of developing 2D morphologies to achieve enhanced conductivity, especially along desired directions, towards their applications in high density integrated electronic devices. Despite their positive aspects, successful fabrication of 2D PANI nanostructures with improved properties is in its infancy because of the difficulties in controlling surface and interfacial properties. Here, we present a facile synthesis of 2D PANI nanosheets via chemical oxidative polymerization using ice as a template. The ice offers unique surfaces of water molecules that are arranged in layers of hexagonal rings, facilitating hydrogen bonding interactions with aniline monomers in an organized manner. The easy removal of ice also enables the attainment of template-free PANI nanosheets in tens of nanometers thickness. Notably, the ice-templated PANI nanosheets revealed two orders of magnitude higher electrical conductivity than conventional PANI thin films prepared by electrochemical deposition methods. The origin of the improved electrical properties of the PANI nanosheets was found in a unique edge-on π-stacking, attributed to ordered hydroxyl groups at the ice surfaces. Our work should open a new chapter in advancing organic electronics upon putting forward a new methodology.