Optically directed assembly of continuous mesoscale filaments.
PHYSICAL REVIEW LETTERS 2011;
106:095501. [PMID:
21405632 DOI:
10.1103/physrevlett.106.095501]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2010] [Revised: 12/30/2010] [Indexed: 05/30/2023]
Abstract
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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