Giant Enhanced Diffusion of Gold Nanoparticles in Optical Vortex Fields

被引：57

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

共 31 条

[1] Scattering Forces from the Curl of the Spin Angular Momentum of a Light Field [J].

Albaladejo, Silvia ;

Marques, Manuel I. ;

Laroche, Marine ;

Saenz, Juan Jose .

PHYSICAL REVIEW LETTERS, 2009, 102 (11)

[2] Optical trapping and manipulation of neutral particles using lasers [J].

Ashkin, A .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 1997, 94 (10) :4853-4860

[3] Measurement of local viscoelasticity and forces in living cells by magnetic tweezers [J].

Bausch, AR ;

Möller, W ;

Sackmann, E .

BIOPHYSICAL JOURNAL, 1999, 76 (01) :573-579

[4] OPTICAL MATTER - CRYSTALLIZATION AND BINDING IN INTENSE OPTICAL-FIELDS [J].

BURNS, MM ;

FOURNIER, JM ;

GOLOVCHENKO, JA .

SCIENCE, 1990, 249 (4970) :749-754

[5] Threshold diffusion in a tilted washboard potential [J].

Costantini, G ;

Marchesoni, F .

EUROPHYSICS LETTERS, 1999, 48 (05) :491-497

[6] Methods of digital video microscopy for colloidal studies [J].

Crocker, JC ;

Grier, DG .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1996, 179 (01) :298-310

[7] Multiple-particle tracking and two-point microrheology in cells [J].

Crocker, John C. ;

Hoffman, Brenton D. .

CELL MECHANICS, 2007, 83 :141-178

[8] THE DISCRETE-DIPOLE APPROXIMATION AND ITS APPLICATION TO INTERSTELLAR GRAPHITE GRAINS [J].

DRAINE, BT .

ASTROPHYSICAL JOURNAL, 1988, 333 (02) :848-872

[9]

Edwards D.F., 1985, Handbook of optical constants of solids

[10] Diffusion of colloidal particles in a tilted periodic potential: Theory versus experiment [J].

Evstigneev, Mykhaylo ;

Zvyagolskaya, Olga ;

Bleil, Stefan ;

Eichhorn, Ralf ;

Bechinger, Clemens ;

Reimann, Peter .

PHYSICAL REVIEW E, 2008, 77 (04)

← 1 2 3 4 →