Laser fabrication and crystallization of nano materials

Teruki Sugiyama; Tsuyoshi Asahi; Kenichi Yuyama; Hiroki Takeuchi; Hyeon-Gu Jeon; Yoichiroh Hosokawa; Hiroshi Masuhara

doi:10.1117/12.771175

12 February 2008 Laser fabrication and crystallization of nano materials

Teruki Sugiyama, Tsuyoshi Asahi, Kenichi Yuyama, Hiroki Takeuchi, Hyeon-Gu Jeon, Yoichiroh Hosokawa, Hiroshi Masuhara

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Proceedings Volume 6891, Organic Photonic Materials and Devices X; 689112 (2008) https://doi.org/10.1117/12.771175
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

We have prepared nanoparticles of five organic dye molecules by laser ablation of their microcrystals in poor solvents using the third harmonics of nanosecond Nd³⁺:YAG laser as an excitation light source. Their colloidal solutions were stable for longer than 1 week without any surfactants. The mean size was almost common to all the dyes (about 50 nm) and its distribution was narrow, which was confirmed by SEM observation. By applying electrophoretic deposition, the homogeneous thin film of quinacridone nanoparticles was fabricated on an indium-tin-oxide electrode. It was demonstrated that the films with different grain size and crystalline phase can be fabricated arbitrarily by using different nanoparticles. Laser ablation is also useful for crystallization of organic molecules, which was demonstrated for a representative organic nonlinear optical material.

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Teruki Sugiyama, Tsuyoshi Asahi, Kenichi Yuyama, Hiroki Takeuchi, Hyeon-Gu Jeon, Yoichiroh Hosokawa, and Hiroshi Masuhara "Laser fabrication and crystallization of nano materials", Proc. SPIE 6891, Organic Photonic Materials and Devices X, 689112 (12 February 2008); https://doi.org/10.1117/12.771175

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KEYWORDS

Nanoparticles

Crystals

Laser crystals

Laser ablation

Molecules

Particles

Molecular lasers

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