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首页> 外文期刊>The Journal of Chemical Physics >Thermal tweezers for nano-manipulation and trapping of interacting atoms or nanoparticles on crystalline surfaces
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Thermal tweezers for nano-manipulation and trapping of interacting atoms or nanoparticles on crystalline surfaces

机译：热镊子，用于在晶体表面进行纳米操作并捕获相互作用的原子或纳米颗粒

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摘要

Thermal tweezers is an all-optical nanofabrication technique where surface thermophoresis due to holographically induced strong temperature modulation is used for parallel manipulation and trapping of adatoms and adparticles with nanoscale resolution. This paper conducts the detailed numerical analysis of thermal tweezers in the presence of significant interaction between the adparticles on the surface. In particular, we demonstrate that the considered inter-particle interactions result in a significant enhancement of the surface thermophoretic effect and substantially increases modulation of particle concentration on the surface. In addition, we predict the possibility to achieve adparticle confinement on the surface to strongly sub-wavelength regions ～12 times smaller than the vacuum wavelength of the optical radiation. A numerical approach to surface diffusion of interacting nanoparticles and adatoms is developed, the Monte Carlo interaction method, and its applicability conditions and limitations are discussed. The obtained results will be important for better understanding of the fundamental aspects of surface thermophoresis, as well as the development of new approaches to nano-patterning of surfaces for engineering their optical, electronic, chemical, and mechanical properties by means of the directed self-assembly of nanoparticles and adatoms.
机译：热镊子是一种全光学的纳米加工技术，由于全息诱导的强温度调节，表面热泳被用于纳米级分辨率的原子和粒子的平行操作和捕集。本文对表面上的吸附颗粒之间存在明显相互作用的热镊子进行了详细的数值分析。特别地，我们证明了所考虑的粒子间相互作用导致表面热泳效应的显着增强并大大增加了表面上粒子浓度的调节。此外，我们预测了在表面上将广告粒子限制在比光辐射的真空波长小约12倍的强子波长区域的可能性。研究了相互作用的纳米粒子和吸附原子的表面扩散的数值方法，蒙特卡罗相互作用方法，并讨论了其适用条件和局限性。获得的结果对于更好地了解表面热泳的基本方面，以及开发新的方法进行表面纳米构图以通过定向自对准来工程化其光学，电子，化学和机械性能，具有重要意义。纳米粒子和吸附原子的组装。

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