Accurate control of individual metallic nanowires by light-induced dielectrophoresis: Size-based separation and array-spacing regulation
•Nanowires, single or uniform-array, are precisely assembled by light-patterns.•Nanowires of different sizes are individually separated in real time.•The spacing-distance of arrays is automatically adjusted by regulating ac frequency. In this paper, we utilize the light-induced dielectrophoretic tec...
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Published in | Sensors and actuators. A. Physical. Vol. 225; pp. 139 - 147 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
15.04.2015
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Subjects | |
Online Access | Get full text |
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Summary: | •Nanowires, single or uniform-array, are precisely assembled by light-patterns.•Nanowires of different sizes are individually separated in real time.•The spacing-distance of arrays is automatically adjusted by regulating ac frequency.
In this paper, we utilize the light-induced dielectrophoretic technique to realize the accurate control of nanowires, including positioning of single nanowires, separation of different-sized nanowires, and spacing regulation of uniform nanowire-arrays. Nanowires can exactly stabilize at the center of a regular geometric light-spot with a slight eccentricity of 2.1±0.64%. Additionally, nanowires of different lengths (∼6μm and ∼12μm) are separated individually by a light-bar with a proper traveling velocity, which is measured and selected according to an acceleration-displacement measurement method. Based on this, uniform nanowire-arrays are assembled instantly, and emerge an equidistant distribution. In reality, the array spacing-distance presents a frequency dependence, and can be automatically adjusted from 6 to 21μm for two-wire array and 7–16μm for three-wire array, respectively. The accurate positioning and orderly management of nanowires may potentially increase the efficiency of nanowire assembly, and be contributed to the nano-device building. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0924-4247 1873-3069 |
DOI: | 10.1016/j.sna.2014.07.025 |