High-efficiency technique based on dielectrophoresis for assembling metal, semiconductor, and polymer nanorods |
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Authors: | Heng Yuan Kyu-jin Kin Won-seok Kang Byoung-ho Kang Se-hyuk Yeom Jae-ho Kim and Shin-won Kang |
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Institution: | (1) Department of Biomedical Engineering, College of Engineering, University of Iowa, Iowa City, Iowa 52242, USA;(2) Department of Chemical and Biochemical Engineering, College of Engineering, University of Iowa, Iowa City, Iowa 52242, USA;(3) Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, Iowa 52242, USA; |
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Abstract: | This paper presents a high-efficiency technique based on dielectrophoresis (DEP) for assembling metal, semiconductor, and
polymer nanorods, which are synthesized by electrochemical deposition (ECD). The assembly patterns of these nanorods (width:
20 nm; length: 7 μm) were designed using a finite element method (FEM) simulation tool. Further, these nanorods were used
in our experiment after their assembly patterns were fabricated. The assembly yield was found to be approximately 70% at an
AC voltage of 30 Vp-p and at frequencies of 20 and 30 kHz, and the DC voltage prevented the random alignment of the nanorods at the edge of the
assembly pattern. Moreover, the above-mentioned nanorods, which had different permittivities, were found to have similar assembly
yields. The proposed method can be improved and applied to nanostructure device fabrication. |
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