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arXiv · 1303.1934

Controlled and Continuous Patterning of Organic and Inorganic Materials by Induced Nucleation in an Optical Tweezers

Basudev Roy·Manish Arya·Preethi Thomas·Julius Konstantin Jürgschat·Venkat Rao·Ayan Banerjee·Chilla Malla Reddy·Soumyajit Roy
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Abstract

We demonstrate for the first time controlled patterning by inducing nucleation of material from a dense aqueous dispersion or solution in an optical tweezers. A hot spot is formed on a glass surface by the trapping laser due to which a water vapor bubble is formed causing Gibbs-Marangoni convection of material around the bubble. This results in accretion of material around the bubble, which eventually nucleates into a crystalline state of the material. The nucleation site, when moved by translating the microscope stage of the optical tweezers apparatus, forms a pattern. We have demonstrated the technique using exotic inorganic materials such as soft oxometalates, and organic materials such as glycine, paracetamol, and a fluorescent dye such as perylene. We have written patterns over lengths of nearly 1 mm at the rate of 1 Hz, with best resolution of about 1 micron. The technique has potential for a wide range of applications ranging from solution processed printable electronics to controlled catalysis.

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Basudev Roy, Manish Arya, Preethi Thomas, Julius Konstantin Jürgschat, Venkat Rao, Ayan Banerjee, Chilla Malla Reddy, Soumyajit Roy. 2013-03-08. Controlled and Continuous Patterning of Organic and Inorganic Materials by Induced Nucleation in an Optical Tweezers. https://arxiv.org/abs/1303.1934

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