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Nanosecond laser preparation of C60 aqueous nanocolloids

Paper ID Volume ID Publish Year Pages File Format Full-Text
27297 44015 2009 6 PDF Available
Title
Nanosecond laser preparation of C60 aqueous nanocolloids
Abstract

C60 aqueous nanocolloids were prepared by irradiating a suspended aqueous solution of C60 with intense nanosecond 532 and 355 nm laser pulses. The initial submicron crystal of C60 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 C60 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 13C NMR analysis of 1,2-dichlorobenzene-d4 solution, where the possible products can be dissolved in addition to C60 nanoparticles. The present result is the first demonstration of the preparation of pure and very stable C60 aqueous nanocolloids without any additives. The formation mechanism and potential application to biological testing and toxicity are discussed.

Keywords
C60; Aqueous nanocolloids; Laser ablation; High dispersibility
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 207, Issue 1, 5 September 2009, Pages 7–12
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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