期刊
NANO LETTERS
卷 10, 期 11, 页码 4302-4308出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl904167t
关键词
Optical trapping; optical tweezers; plasmonic; Au; nanoparticle; nanopatterning; directed assembly
类别
资金
- National Science Foundation [CHE-0616663]
- Dreyfus Foundation
- Chemical Sciences, Geosciences, and Biosciences Division of the Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy [DE-AC02-06CH11357]
- Center For Nanoscale Materials at Argonne National Laboratory [DE-AC02-06CH11357]
The fabrication of nanoscale devices would be greatly enhanced by nanomanipulators that can position single and few objects rapidly with nanometer precision and without mechanical damage. Here, we demonstrate the feasibility and precision of an optical laser tweezer, or optical trap, approach to place single gold (Au) nanoparticles on surfaces with high precision (approximately 100 rim standard deviation). The error in the deposition process is rather small but is determined to be larger than the thermal fluctuations of single nanoparticles within the optical trap. Furthermore, areas of tens of square micrometers could be patterned in a matter of minutes. Since the method does not rely on lithography, scanning probes or a specialized surface, it is versatile and compatible with a variety of systems. We discuss active feedback methods to improve positioning accuracy and the potential for multiplexing and automation.
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