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제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Effect of alkyl chain in the supramolecular assembly with SWNT and its electrocatalytic application

2016년 8월 30일 09시 25분 16초
ORGN.P-409 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 14일 (금요일) 11:00~12:30
저자 및
장재규, 홍종인*
서울대학교 화학부, Korea
Supramolecular architectures have lots of potentials in field of organic electronics. Despite of many efforts, simultaneous achievement both in structural aspect and electrical properties was regarded to be very difficult with the only use of self- assembled structure. It is necessary to have functional groups, which are disadvantageous in electrical properties, to build supramolecular architecture. To overcome drawbacks, there has been an increasing study to make hierarchical structures with carbon materials due to its excellent electrical and mechanical properties. Recently, our group reported self-assembled nanostructures, such as nanofiber and nanosheet, by controlling volume fraction of hydrophilic region of amphiphiles.1 These self-assembly molecules are able to disperse graphene and single wall carbon nanotube (SWNT) in aqueous media according to structure analogy. However, the knowledge for intermolecular packing between adsorbent and either carbon materials or themselves was poorly under-stood. It is necessary to understand supramolecular interaction and their effect on electrical property in order to use carbon material based supramolecular complex into organic electronics. We synthesized two amphiphilic molecules to investigate influence of different hydrophobic region upon supramolecular arrangement on SWNT surface. We demonstrated that alkyl chain moiety within hydrophobic region played an important role in making supramolecular assembly by using structural analysis and molecular dynamics (MD) simulation. We also proved that the ordered supramolecular SWNT-amphiphile complexes show poor electrocatalytic activity due to less effective area to electrolytes. We used two functionalized SWNT as counter electrode, which show 86 %, 68 % as compared to platinum based counter electrodes, with alkyl chain and without alkyl chain respectively. 1. Lee, W.; Lee, D. W.; Lee, M.; Hong, J. I., Chem. Commun. 2014, 50, 14851.