公开(公告)号：WO2017035189A1

公开(公告)日：2017-03-02

申请号：PCT/US2016/048315

申请日：2016-08-24

Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY

Inventor： ILIC, Ognjen ,  KAMINER, Ido E. ,  SOLJACIC, Marin ,  LAHINI, Yoav

IPC: G01N33/00 ,  G02F1/00 ,  G02F1/1337 ,  B81B1/00 ,  B81B3/00 ,  B82B1/00 ,  B82B3/00

CPC classification number: H05H3/04 ,  C01B21/076 ,  G02B21/32

Abstract: A technique to guide a micro- or nano-scale particle uses the wavelengths of light beams to control the direction of motion of the particle. In this technique, an optical asymmetry is introduced into the particle to form a composite particle. The composite particle includes two faces that preferentially absorb light of different wavelengths, independent of the particle orientation. The difference in absorption spectra of the two faces creates a bidirectional and local thermal gradient that is externally switchable by changing the wavelength of the incident light beams. This thermal gradient induces a thermophoretic drift that moves the composite particle. A two-faced nanoparticle can be guided using the optically induced thermophoretic drift as the propulsion mechanism.

Abstract translation: 引导微尺度或纳米级粒子的技术使用光束的波长来控制粒子的运动方向。 在该技术中，将光学不对称性引入到颗粒中以形成复合颗粒。 复合颗粒包括两个不同于颗粒取向的吸收不同波长的光的表面。 两个面的吸收光谱差异产生双向和局部热梯度，通过改变入射光束的波长可从外部切换。 该热梯度引起移动复合颗粒的热泳漂移。 可以使用光学诱导的热泳漂移作为推进机制来引导双面纳米颗粒。