Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Micro-particles in a Nanoliter Droplet Dispensed by a Pneumatic Dispensing System and Its Measurement

공압 디스펜싱 시스템을 이용한 나노리터 액적에 포함된 미세 입자의 분주 및 측정

  • Lee, Sang-Min (Department of Mechanical Engineering, Pohang University of Science and Technology) ;
  • Kim, Joon-Won (Department of Mechanical Engineering, Pohang University of Science and Technology)
  • 이상민 (포항공과대학교 기계공학과) ;
  • 김준원 (포항공과대학교 기계공학과)
  • Received : 2012.03.09
  • Accepted : 2012.05.13
  • Published : 2012.08.01
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Abstract

This paper presents results for dispensing and measuring micro-particles using a pneumatic dispensing system. Particle-suspended liquid droplets were dispensed and analyzed quantitatively at various particle concentrations and applied pressures. By using a developed experimental setup, the number of particles and the particle volume ratio in sequentially dispensed droplets were measured. Hydrophilic and hydrophobic surfaces were tested to find a suitable surface for counting the number of particle. It was confirmed that the dispensed particles concentrated into the center of the droplet on the smooth CD surface after evaporation of liquid. As the applied positive pressure increased, the number of particles per droplet increased consistently and the volume fraction of particles remained constant.

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References

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