Optically Directed Assembly of Continuous Mesoscale Filaments

被引：14

作者：

Bahns, J. T. ^{[1
]}

Sankaranarayanan, S. K. R. S. ^{[2
]}

Gray, S. K. ^{[2
]}

Chen, L. ^{[1
]}

机构：

[1] Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA

[2] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 09期

关键词：

LIGHT-INDUCED AGGREGATION; NANOPARTICLES; PARTICLES;

D O I：

10.1103/PhysRevLett.106.095501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate irreversible continuous filament formation when a weak laser focus is positioned near the edge of an evaporating colloidal droplet containing carbon and gold nanoparticles. Optical trapping, hydrothermal, and chemical interactions lead to controlled colloidal synthesis of stable, irreversible mesoscale filaments of arbitrary shape and size. Mechanisms for this optically directed assembly are discussed with fluid dynamics, molecular dynamics, and lattice kinetic Monte Carlo calculations.

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页数：4

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