Application Direction of Submicrometer Spherical Particles Fabricated by Pulsed Laser Melting in Liquid

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  • 液中レーザー溶融法により得られるサブミクロン球状粒子の応用展開
  • エキ チュウ レーザー ヨウユウホウ ニ ヨリ エラレル サブミクロン キュウジョウ リュウシ ノ オウヨウ テンカイ

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Abstract

Fabricating functional submicrometer particles is difficult by conventional particle fabrication techniques that use top-down or bottom-up approaches. Pulsed-laser melting in liquid is a versatile technique for crystalline submicrometer spherical particles of various materials. Space-selective pulsed heating of particles that are suspended in liquid by laser irradiation plays an important role in raising the particle temperature over the melting point and quenching melt droplets for spherical particle formation. The balance between high heat capacity at the larger particle side and low optical absorption at the smaller particle side leads to the selective formation of submicrometer spherical particles. We demonstrate some critical application examples of submicrometer spherical particles with both size-derived and bulk functions by reducing the size to the submicrometer scale. Key Words: Submicrometer, Particles, Melting, Liquid, Spheres

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