Nanoscale size-selective deposition of nanowires by micrometer scale hydrophilic patterns

Yong He, Kazuki Nagashima, Masaki Kanai, Gang Meng, Fuwei Zhuge, Sakon Rahong, Xiaomin Li, Tomoji Kawai, Takeshi Yanagida

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Controlling the post-growth assembly of nanowires is an important challenge in the development of functional bottom-up devices. Although various methods have been developed for the controlled assembly of nanowires, it is still a challenging issue to align selectively heterogeneous nanowires at desired spatial positions on the substrate. Here we report a size selective deposition and sequential alignment of nanowires by utilizing micrometer scale hydrophilic/hydrophobic patterned substrate. Nanowires dispersed within oil were preferentially deposited only at a water/oil interface onto the hydrophilic patterns. The diameter size of deposited nanowires was strongly limited by the width of hydrophilic patterns, exhibiting the nanoscale size selectivity of nanowires deposited onto micrometer scale hydrophilic patterns. Such size selectivity was due to the nanoscale height variation of a water layer formed onto the micrometer scale hydrophilic patterns. We successfully demonstrated the sequential alignment of different sized nanowires on the same substrate by applying this size selective phenomenon.

Original languageEnglish
Article number5943
JournalScientific reports
Volume4
DOIs
Publication statusPublished - Aug 4 2014

All Science Journal Classification (ASJC) codes

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