US 12,246,322 B2
Microscopic object collection method and microscopic object collection system
Takuya Iida, Sakai (JP); Shiho Tokonami, Sakai (JP); Hiroki Ishikawa, Nagaokakyo (JP); and Tsutomu Yamasaki, Nagaokakyo (JP)
Assigned to University Public Corporation Osaka, Osaka (JP); and MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Appl. No. 17/606,185
Filed by University Public Corporation Osaka, Osaka (JP); and Murata Manufacturing Co., Ltd., Nagaokakyo (JP)
PCT Filed Apr. 22, 2020, PCT No. PCT/JP2020/017349
§ 371(c)(1), (2) Date Oct. 25, 2021,
PCT Pub. No. WO2020/218347, PCT Pub. Date Oct. 29, 2020.
Claims priority of application No. 2019-083997 (JP), filed on Apr. 25, 2019.
Prior Publication US 2022/0226814 A1, Jul. 21, 2022
Int. Cl. B01L 3/00 (2006.01); B01L 7/00 (2006.01); G01N 1/18 (2006.01); G01N 1/40 (2006.01); G01N 1/44 (2006.01); G02B 21/32 (2006.01)
CPC B01L 3/50851 (2013.01) [B01L 3/502792 (2013.01); B01L 7/00 (2013.01); G01N 1/18 (2013.01); G01N 1/4022 (2013.01); G01N 1/44 (2013.01); B01L 3/502715 (2013.01); B01L 2200/0647 (2013.01); B01L 2300/1861 (2013.01); G02B 21/32 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A microscopic object collection method of collecting a plurality of microscopic objects dispersed in a liquid, the method comprising:
preparing the liquid on a photothermal conversion region provided on a main surface of a substrate;
irradiating the photothermal conversion region with a first beam and a second beam with the first beam and the second beam being distant from each other, the first beam and the second beam each being a beam having a wavelength within an absorption wavelength range of the photothermal conversion region;
producing a first bubble in the liquid at a first position of the photothermal conversion region irradiated with the first beam and producing a second bubble in the liquid at a second position of the photothermal conversion region irradiated with the second beam by heating the liquid by irradiation with the first and second beams; and
collecting the plurality of microscopic objects in a region of the liquid between the first bubble and the second bubble by producing convection of the liquid in a specific direction, the first bubble and the second bubble being aligned in a direction of alignment, the specific direction being a direction in parallel to the main surface and perpendicular to the direction of alignment of the first bubble and the second bubble; wherein
the photothermal conversion region includes a material that includes a light absorption factor in the wavelength range of the first and second beams.