Nano Archive

Synthesis of Nanoscale Tips Using Femtosecond Laser Radiation under Ambient Condition

Sivakumar, M. and Venkatakrishnan, K. and Tan, B. (2009) Synthesis of Nanoscale Tips Using Femtosecond Laser Radiation under Ambient Condition. Nanoscale Research Letters, 5 (2). pp. 438-441.

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Official URL: http://www.springerlink.com/content/gm8281427107p2...

Abstract

We report a unique growth of platelet-shaped nanoscale tips of transparent dielectric using femtosecond laser radiation at MHz pulse repetition rate with nitrogen background gas flow under ambient condition. The tips grew with sharp nanoscale apex while their base and lengths are of the order of few hundred nanometers. In the absence of nitrogen, the irradiation leads to nanofibrous structure formation. The collision between the nitrogen gas atoms and the vapor species slows down plume expansion and lead to an increase of nanoparticles size. This prevents the fibrous structure formation and provides appropriate condition for nanoscale tips growth.

Item Type:Article
Uncontrolled Keywords:Femtosecond laser ablation - Nanoscale tips - Nanostructuring
Subjects:Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Engineering > Nanotechnology applications in mechanical engineering
Technology > Manufacturing processes for nanotechnology
ID Code:8142
Deposited By:Lesley Tobin
Deposited On:31 Mar 2010 16:01
Last Modified:31 Mar 2010 16:01

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