Polarization of thermophoretic swimmers in external temperature fields

Polarization of thermophoretic swimmers in external temperature fields
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外部温度场中热泳泳者的极化

DOI:
10.1117/12.2239482
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
F. Cichos
F. Cichos
中科院分区:
--
文献类型:
--
作者:
A.P. Bregulla;F. Cichos

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我们研究了Janus粒子在由光学加热的金纳米粒子产生的非均匀外部温度场中的运动。Janus粒子由一个半球上覆盖着一层50 nm金膜的聚苯乙烯粒子组成。Janus粒子被光子轻推保持在固定的金纳米粒子附近,这会积极地将Janus粒子推向目标。靠近热源时,推进器被关闭。我们发现粒子对热源的斥力与角度有关。此外,还测量了Janus粒子的角速度,这导致了Janus粒子在温度场中的主动极化。
We study the motion of a Janus particle in an inhomogeneous external temperature field generated by an optically heated gold nanoparticle. The Janus particle consists of a polystyrene particle covered on one hemisphere with a 50 nm gold film. The Janus particle is held in the vicinity of the immobilized gold nanoparticle by photon nudging, which actively propels the Janus particle towards a target. Close to the heat source, the propulsion is switched off. We find an angle dependent repulsion of the particle from the heat source. Further, an angular velocity of the Janus particle is measured, which results in an active polarization of the Janus particle in the temperature field.
DOI: 10.1103/physreve.89.050303
发表时间: 2014-05-14
期刊: PHYSICAL REVIEW E
影响因子: 2.4
作者:
Bickel, Thomas;Zecua, Guillermo;Wuerger, Alois
通讯作者: Wuerger, Alois
DOI: 10.1021/nn501568e
发表时间: 2014-07-01
期刊: ACS NANO
影响因子: 17.1
作者:
Bregulla, Andreas P.;Yang, Haw;Cichos, Frank
通讯作者: Cichos, Frank