Directional Clustering of Slanted Nanopillars by Elastocapillarity

Sang Moon Kim, Junsoo Kim, Seong Min Kang, Segeun Jang, Daeshik Kang, Seung Eon Moon, Hong Nam Kim, Hyunsik Yoon

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

A strategy to induce the directional clustering of nanopillars by controlling their tilted angles was proposed. Regularly spaced nanopillar arrays with different tilted angles of 0°, 15°, 30°, and 45° was prepared and their clustering was demonstrated by dispersing and drying a deionized water droplet on them. By observing their clustering patterns, a simple model was developed to explain the features of tilted-angle-dependent clustering, and a criterion was proposed to classify the continuity of clustering. It was observed that the tilted-angle-dependent clustering of nanopillar arrays after drying the water droplet. It was noncontinuous and island-like with 0°?and 15° tilt, but continuous and unidirectional with 30° and 45° tilt. The designed asymmetric, directional clustering of tilted nanopillars would be applicable to the directional self-assembly of high aspect ratio nanostructures and directional transport of specific materials.

Original languageEnglish
Pages (from-to)3764-3769
Number of pages6
JournalSmall
DOIs
StatePublished - 2016

Keywords

  • adhesion
  • clustering
  • directional properties
  • elastocapillarity
  • nanopillars

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