標題: Nanosecond laser preparation of C-60 aqueous nanocolloids
作者: Sugiyama, Teruki
Ryo, Sen-ichi
Oh, Isamu
Asahi, Tsuyoshi
Masuhara, Hiroshi
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
關鍵字: C-60;Aqueous nanocolloids;Laser ablation;High dispersibility
公開日期: 5-九月-2009
摘要: C-60 aqueous nanocolloids were prepared by irradiating a suspended aqueous solution of C-60 with intense nanosecond 532 and 355 nm laser pulses. The initial submicron crystal of C-60 was fragmented into nanoparticles, resulting in a transparent yellow solution which was followed by UV/vis absorption spectroscopy. The obtained absorption spectra were similar to those for C-60 bulk film and its nanoparticles, which have a size on the order of 10 nm, and their formation had thresholds with respect to laser fluence. The nanoparticles were confirmed by their SEM observation and by examining the centrifuging effect on the colloids, while possible photochemical decomposition was excluded by C-13 NMR analysis of 1,2-dichlorobenzene-d(4) solution, where the possible products can be dissolved in addition to C-60 nanoparticles. The present result is the first demonstration of the preparation of pure and very stable C-60 aqueous nanocolloids without any additives. The formation mechanism and potential application to biological testing and toxicity are discussed. (C) 2009 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jphotochem.2009.01.015
http://hdl.handle.net/11536/149840
ISSN: 1010-6030
DOI: 10.1016/j.jphotochem.2009.01.015
期刊: JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume: 207
起始頁: 7
結束頁: 12
顯示於類別:期刊論文