Laser-Induced Formation and Disintegration of Gold Nanopeanuts and Nanowires 


Vol. 31,  No. 4, pp. 819-824, Apr.  2010
10.5012/bkcs.2010.31.4.819


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  Abstract

We report the laser-induced formation of peanut-shaped gold nanoparticles (Au nanopeanuts) and gold nanowires (AuNWs), and their morphological properties. Pulsed laser irradiation of citrate-capped gold nanoparticles at 532 nm induces fragmentation, spherical growth, the formation of Au nanopeanuts, and the formation of AuNWs, sequentially. High-resolution transmission electron microscopy images reveal that the Au nanopeanuts are formed by instantaneous fusion of spherical nanoparticles in random orientation by laser heating. Furthermore, Au nanopeanuts are bridged in a linear direction to form AuNWs by an amorphous accumulation of gold atoms in the junction. The laser-produced Au nanopeanuts and AuNWs slowly disintegrate, restoring the spherical shape of the original Au nanoparticles when the laser irradiation is stopped. The addition of citrate effectively prevents them from transforming back to the nanospheres.

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  Cite this article

[IEEE Style]

J. S. Park, J. H. Yoon, H. J. Kim, Y. D. Huh, S. Yoon, "Laser-Induced Formation and Disintegration of Gold Nanopeanuts and Nanowires," Bulletin of the Korean Chemical Society, vol. 31, no. 4, pp. 819-824, 2010. DOI: 10.5012/bkcs.2010.31.4.819.

[ACM Style]

Jung Shin Park, Jun Hee Yoon, Hyung Jun Kim, Young Duk Huh, and Sangwoon Yoon. 2010. Laser-Induced Formation and Disintegration of Gold Nanopeanuts and Nanowires. Bulletin of the Korean Chemical Society, 31, 4, (2010), 819-824. DOI: 10.5012/bkcs.2010.31.4.819.

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ISSN(Print) 0253-2964
ISSN(Online) 1229-5949