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

제115회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Tailored Synthesis and Application of Anisotropic Nanomaterials

2015년 2월 23일 12시 29분 32초
MAT2-3 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 14시 : 30분
재료화학 - Synthesis and Application of Exotic Nanoparticles
저자 및
한림대학교 화학과, Korea
By using unique and efficient soft-templates, and changing reaction conditions controllably, we could synthesize interesting anisotropic nanomaterials. Solubilization of specific anions into an aqueous CTAB (cetyltrimethylammonium bromide) or CTAC (cetyltrimethylammonium chloride) solution led to the formation of rod-shaped micelles and became a key shape directing factor to generate one-dimensional Au structures. Through this strategy and seed-mediated methods, nanoscaled Au rods and Au bipyramids were synthesized. The structural factors of these metallic systems were effectively controlled by varying the amount of spherical gold nanoparticle seed or salicylate ion. We could also fabricate a variety of Au nanofibers in solution by adjusting CTAB or mixed surfactants of CTAB and Brij35. We show the syntheses of unique “Au Raspberry-Like Nanoparticles (Au RLNPs)” by use of nonionic Brij surfactants and “Star-shaped gold nanoparticles (Au SSNPs)” through a facile seed-mediated method using cetyltrimethylammonium bromide (CTAB), Brij35, Au seed nanoparticles, Ag+ ions, ascorbic acid, and salicylic acid. In particular, it is noteworthy that the lengths of each branch of Au SSNPs were finely tuned by the change of molar ratio of surfactants, and salicylate ion. These are novel and simple synthetic approaches for generating anisotropic nanomaterials, which can be applied to a variety of areas such as catalysis. We also describe a facile method for the fabrication of Ni-based coordination polymer nanoparticles using modulators (e.g. acetic acid, benzoic acid, or pyridine) to control their size. The resultant coordination polymer nanoparticles were then calcinated at controlled temperature to produce porous nickel oxide (NiO) nanomaterial with high surface area. We successfully deposited NiO nanostructures onto an indium tin oxide (ITO) serving as an efficient matrix for the immobilization of urease (Ur) for urea detection. The prepared bioelectrode (Ur/NiO/ITO/glass) is successfully employed for urea sensing using amperometric techniques.