光学镊子
纳米流体学
纳米技术
热泳
等离子体子
纳米光子学
衍射
材料科学
纳米尺度
微流控
纳米颗粒
镊子
纳米晶
光学
光电子学
纳米流体
物理
作者
Jianxing Zhou,Xiaoqi Dai,Boliang Jia,Junle Qu,Ho‐Pui Ho,Bruce Z. Gao,Yufeng Shao,Jiajie Chen
摘要
Plasmonic optical tweezers with the ability to manipulate nano-sized particles or molecules that are beyond the diffraction limit have been developed rapidly in recent years. However, plasmonic heat generation always limits its applications in capturing particles or biomacromolecules that are vulnerable to high temperatures. Here, we propose nanorefrigerative tweezers based on a single refrigerative nanocrystal, which can form a nanometer-sized cold-spot via anti-Stokes fluorescence. Numerical simulations are performed to compute the temperature and velocity fields. The results show that thermo-osmosis and thermophoresis play major roles in nanoparticle manipulation, while natural convection in the nanoscale is negligible. This tweezing scheme not only offers a sub-diffraction-limit way to manipulate nano-objects but also avoids possible thermal damage to the trapped targets. Therefore, it will potentially become a powerful tool in biomedical and biosensing research studies.
科研通智能强力驱动
Strongly Powered by AbleSci AI