Kim, Seol Ji and Ah, Chil Seong and Jang, Du-Jeon (2009) Laser-induced growth and reformation of gold and silver nanoparticles. Journal of Nanoparticle Research, 11 (8). pp. 2023-2030.
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The sizes, shapes, and growth rates of gold and silver nanoparticles stabilized with polyvinylpyrrolidone in water can be controlled by using picosecond laser pulses. The nucleation of small metal clusters formed with NaBH4 addition to produce nanoparticles takes two months with aging but 30 min with laser irradiation. Laser pulses can also induce nanoparticles to have narrow size and shape distribution or to undergo aggregation into much larger particles. The latter process is more likely found when the metal is silver or the irradiation wavelength is short. Laser-induced growth and shape transformation processes are explained in terms of BH4 − depletion, metal fusion, and electron ejection followed by disintegration.
|Uncontrolled Keywords:||Nucleation - Optical fabrication - Picosecond pulses - Polyvinylpyrrolidone - Shape transformation - Colloids|
|Subjects:||Technology > Manufacturing processes for nanotechnology|
Material Science > Nanochemistry
Physical Science > Photonics
|Deposited On:||06 Jan 2010 14:30|
|Last Modified:||06 Jan 2010 14:30|
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