| 학회 | 한국고분자학회 |
| 학술대회 | 2004년 가을 (10/08 ~ 10/09, 경북대학교) |
| 권호 | 29권 2호, p.567 |
| 발표분야 | 복합재료 |
| 제목 | Modification of Micro-Sized Gold Surface by Chemisorption of Polymer Spheres Containing Thiol Group |
| 초록 | A strategy for producing thin films of organic material on surfaces has been to use sulfur chemisorption as a point of attachment to metals. Formation of Self-Assembled Monolayers(SAMs) on a gold substrates has been developed for a variety of applications such as metal surface modification and biosensor.1 In this study, two families of well-defined organic-inorganic hybird particles have been synthesized by chemisorption of polymer spheres with thiol group onto gold surface. Thiol-functionalized polymer spheres were obtained by two methods : polycondensation of alkanedithol and dibromoalkane in the presence of a crosslinked polystyrene latex2 and substitution reaction of poly(4-bromostyrene-styrene-divinylbenzene) latex with 1,3-propanedithiol. In the first method, a crosslinked polystyrene particles were prepared by soap-free emulsion polymerization. The immobilization of the mercapto group was characterized by UV/vis spectroscopy, and the molar ratio of dithiol to dibromide afforded polymer spheres with high mercapto group contents and the size of polymer spheres. In the second method, the thiol contents were determined by controlling the molar ratio of 4-bromostyrene to styrene. The resulting materials were characterized by NMR, DSC, TGA, and XPS. It was found that gold surface was covered well with the copolymer latex as monolayer by SEM. Figure 1 shows a S 2p XPS spectra for polymer spheres on the gold surface. The interaction of the sulfur headgroup with the gold surface can be revealed by examining S 2p photoemission spectra.3 Figure 2 shows SEM results of gold surface morphology adsorbed by different polymer spheres. Figure 1. XPS spectra for poly(4-bromostyrene-styrene-divinylbenzene) spheres on the micro-sized gold surface. (a) (b) Figure 2. Gold surface adsorbed with thiol-fuctionalized polymer spheres by (a) polycondensation of alkanedithol and dibromoalkane in the presence of a crosslinked polystyrene latex (b) substitution reaction of poly(4-bromostyrene-styrene- divinylbenzene) latex with 1,3-propanedithiol. 참고문헌 1. Janos H. Fendler, Chem. Mater., 13, 3196(2001) ; Dipankar Roy, Janos Fendler, Adv. Mater., 16, 479(2004) 2. Shinji Watanabe, Ryo Ikeda, Hiroyuki Kitagawa, Miki Murata, Yuzuru Masuda, Macromol. Chem. Phys., 201, 896(2000) 3. David L. Pugmire, Michael J. Tarlov, Roger D. van Zee, Langmuir, 19, 3720(2003) |
| 저자 | 박혜진1, 우상욱2, 장지영1, 김준경2, 이상수2 |
| 소속 | 1서울대, 2한국과학기술(연) |
| 키워드 | Chemisorption; Gold; latex; hybrid particle |
