The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
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A Study on Development of Acoustic Tweezer System Using Standing Waves and Very High Frequency Focused Beams

정상파와 초고주파 집속 빔을 이용한 음향집게시스템의 개발에 관한 연구

  • Published : 2008.10.31
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Abstract

For the purpose of possibility study on development of an acoustic tweezer using standing waves and very high frequency ultrasound focused beams, a system which can manipulate the position of particles in water has been constructed. It can move the particles to near focal point of a focused beam by the radiation force of standing waves, and then the particles would be trapped by the radiating force of the focused beam. The results show that micro sphere particles were trapped well at nodes of the standing waves and their position can be easily manipulated by frequency control. And, even though the radiation force by single focused beam pushes a particle away from the transducer, two focused confronted beams can trap it at near center.

정상파와 초고주파 집속 빔을 이용한 초음파 음향집게의 개발 가능성을 타진하는 것을 목적으로, 수중에 놓인 미세입자의 위치를 제어할 수 있는 시스템을 구축하였다. 그 시스템은 입자를 평면 정상파의 방사력에 의해 1차적으로 포획하여 집속 빔의 초점 부근으로 이동시킨 다음, 초고주파 집속 빔의 방사력을 이용하여 2차적으로 포획하는 것이다. 구축된 시스템에 의해 구형 미세 입자의 위치제어 실험을 행한 결과, 정상파 음장에서는 음압의 마디에 입자가 잘 포획되었으며, 주파수의 조정에 의해 그 입자를 임의 위치로 이등조작이 가능하였다. 그리고 단일의 초고주파 집속 빔에 의해서는 음원으로부터 멀어지는 방향으로만 구동력이 작용하나, 2개의 대항하는 집속 빔을 사용할 경우 그 중심 부근에 포획됨을 알았다.

Keywords

References

  1. A. Ashkin, "Acceleration and trapping of particles by radiation pressure," Phys, Rev. Lett. 24, 156-159, 1970 https://doi.org/10.1103/PhysRevLett.24.156
  2. A. Ashkin,"Applications of laser radiation pressure,"Science 210, 1081-1088, 1980 https://doi.org/10.1126/science.210.4474.1081
  3. A. Ashkin, "Optical trapping and manipulation of neutral particles using lasers," Proc. Natl. Acad. Sci. 94, 4853-4860, 1997 https://doi.org/10.1073/pnas.94.10.4853
  4. T. C. Bakker Schut, G. Hesselink, B. G. de Grooth, and J. Greve, "Experimental and theoretical investigations on the validity of the geometrical optics model for calculating the stability of optical traps," Cytometry 12, 479-485, 1991 https://doi.org/10.1002/cyto.990120603
  5. A. Ashkin, "Forces of a single beam gradient laser trap on a dielectric sphere in the ray optics regime." Biophys. J. 61, 569-582, 1992 https://doi.org/10.1016/S0006-3495(92)81860-X
  6. J. W. Lee, K. L. Ha and K. K. Shung, "A theoretical study of the feasibility of acoustical tweezers: Ray acoustics approach," J. Acoust. Soc. Am. 117, 3273-3280, 2005 https://doi.org/10.1121/1.1886387
  7. J. W. Lee and K. K. Shung, "Radiation forces exerted on arbitrarily located sphere by acoustic tweezer," J. Acoust. Soc. Am. 120, 1084-1094, 2006 https://doi.org/10.1121/1.2216899
  8. J. Wu and G. Du, "Acoustic radiation force on a small compressible sphere in a focused beam," J. Acoust. Soc. Am. 87, 997-1003, 1990 https://doi.org/10.1121/1.399435
  9. J. Wu,"Acoustical Tweezers,"J. Acoust. Soc. Am. 89, 2140 -2143, 1991 https://doi.org/10.1121/1.400907
  10. W. L. Nyborg,"Radiation pressure on a small rigid sphere," J. Acoust. Soc. Am. 42, 947-952, 1967 https://doi.org/10.1121/1.1910702
  11. T. Kozuka, T. Tuziuti, H. Mitome, T. Fukuda, and F. Arai, "Control of position of a particle using a standing wave field generated by crossing sound beams," 1998 IEEE Ultrason. Symp. Proc., 657-660, 1998
  12. 小塚晃透, "超音波マイクロマニピュレーション". 日本音 響學會誌, 61, 154-159, 2005
  13. S. Nemoto and H. Togo, "Axial force acting on a dielectric sphere in a focused laser beam," Applied Optics, 37, 6386 -6394, 1998 https://doi.org/10.1364/AO.37.006386
  14. 実吉純一, 菊池喜充, 能本乙彦, 超音波技術便覽, (日刊工業 (日), 1968), 1352-1355