title: Tunable nanowire patterning using standing surface acoustic waves.
abstract: Patterning of nanowires in a controllable, tunable manner is important for the fabrication of functional nanodevices. Here we present a simple approach for tunable nanowire patterning using standing surface acoustic waves (SSAW). This technique allows for the construction of large-scale nanowire arrays with well-controlled patterning geometry and spacing within 5 s. In this approach, SSAWs were generated by interdigital transducers, which induced a periodic alternating current (ac) electric field on the piezoelectric substrate and consequently patterned metallic nanowires in suspension. The patterns could be deposited onto the substrate after the liquid evaporated. By controlling the distribution of the SSAW field, metallic nanowires were assembled into different patterns including parallel and perpendicular arrays. The spacing of the nanowire arrays could be tuned by controlling the frequency of the surface acoustic waves. Additionally, we observed 3D spark-shaped nanowire patterns in the SSAW field. The SSAW-based nanowire-patterning technique presented here possesses several advantages over alternative patterning approaches, including high versatility, tunability, and efficiency, making it promising for device applications.
authors.affiliation: Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
authors.forename: Yuchao
authors.initials: Y
authors.lastname: Chen
authors.forename: Xiaoyun
authors.initials: X
authors.lastname: Ding
authors.forename: Sz-Chin
authors.initials: SC
authors.lastname: Steven Lin
authors.forename: Shikuan
authors.initials: S
authors.lastname: Yang
authors.forename: Po-Hsun
authors.initials: PH
authors.lastname: Huang
authors.forename: Nitesh
authors.initials: N
authors.lastname: Nama
authors.forename: Yanhui
authors.initials: Y
authors.lastname: Zhao
authors.forename: Ahmad Ahsan
authors.initials: AA
authors.lastname: Nawaz
authors.forename: Feng
authors.initials: F
authors.lastname: Guo
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Yeyi
authors.initials: Y
authors.lastname: Gu
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Mallouk
authors.forename: Tony Jun
authors.initials: TJ
authors.lastname: Huang
mesh_terms: D003460:Crystallization / Q000379:methods*; D008422:Materials Testing; D008968:Molecular Conformation / Q000528:radiation effects; D054802:Molecular Imprinting / Q000379:methods*; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure*; D010316:Particle Size; D013016:Sound; D013499:Surface Properties / Q000528:radiation effects
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