Giant Enhanced Diffusion of Gold Nanoparticles in Optical Vortex Fields

被引：55

作者：

Albaladejo, Silvia ^{[1
]}

Marques, Manuel I. ^{[2
]}

Scheffold, Frank ^{[3
,4
]}

Jose Saenz, Juan ^{[1
]}

机构：

[1] Univ Autonoma Madrid, Dept Fis Mat Condensada, E-28049 Madrid, Spain

[2] Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain

[3] Univ Fribourg, Dept Phys, CH-1700 Fribourg, Switzerland

[4] Univ Fribourg, Fribourg Ctr Nanomat, CH-1700 Fribourg, Switzerland

来源：

NANO LETTERS | 2009年 / 9卷 / 10期

基金：

瑞士国家科学基金会;

关键词：

RADIATION PRESSURE; PARTICLE TRACKING; NEUTRAL PARTICLES; MICRORHEOLOGY;

D O I：

10.1021/nl901745a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We study the diffusion of a metal nanoparticle in the nonconservative force field of an optical vertex lattice. Radiation in the vortex array is shown to induce a giant enhancement over the free thermal diffusion. Langevin dynamics simulations show that the diffusion coefficient of (50 nm radius) gold particles at room temperature is enhanced by 2 orders of magnitude at power densities of the order or smaller than those used to trap nanoparticles with optical tweezers.

引用

页码：3527 / 3531

页数：5

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