Microassembly of artificial crystals by inter-particle laser welding and optical characterization

Kenta Takagi, Masanori Omote, Akira Kawasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

To fabricate artificial crystals with any structure from monosized spherical particles, we have so far manufactured a three-dimensionally particle assembling system with a combination of pick-and-place robotic manipulation and inter-particle laser welding. In the present study, we aimed to assemble large-scale artificial crystals of polyethylene (PE) particles by mean of the new system. In this method, an optimization of the laser welding conditions was indispensable for the strong bonding with maintaining the shape of particles. Thus, the two-particle welding tests were preliminarily conducted. On the basis of this result, we successfully assembled the large-scale artificial crystals with diamond structure from the PE -ceramic or -carbon composite particles. In order to discuss applicability of the obtained crystals to terahertz (THz) wave photonic crystals, the transmittance spectrum of the crystals was evaluated by a THz wave time domain spectroscopy. The PE-ceramic particle crystal presented an ideal photonic band gap which perfectly agreed with the theoretical one.

Original languageEnglish
Title of host publicationMultiscale, Multifunctional and Functionally Graded Materials
PublisherTrans Tech Publications Ltd
Pages525-530
Number of pages6
ISBN (Print)0878493077, 9780878493074
DOIs
Publication statusPublished - 2010
Event10th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials, MM and FGMs - Sendai, Japan
Duration: 2008 Sep 222008 Sep 25

Publication series

NameMaterials Science Forum
Volume631-632
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other10th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials, MM and FGMs
Country/TerritoryJapan
CitySendai
Period08/9/2208/9/25

Keywords

  • Dimamond structure
  • Monosized spherical particles
  • Terahertz wave photonic crystals

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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