Shape and feature size control of colloidal crystal-based patterns using stretched polydimethylsiloxane replica molds

Hong Kyoon Choi; Sang Hyuk Im; O. Ok Park

doi:10.1021/la902982y

Shape and feature size control of colloidal crystal-based patterns using stretched polydimethylsiloxane replica molds

Hong Kyoon Choi, Sang Hyuk Im, O. Ok Park

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

In this work, we fabricated various patterns using colloidal crystals as master molds via the soft lithography method. Even though colloidal crystals consist of spherical colloidal particles, nonspherical shaped patterns such as rectangular or elongated hexagonal shaped patterns can be fabricated using a stretched polydimethylsiloxane (PDMS) replica mold. The pattern shape and feature size can be easily controlled by changing the stretching axis and ratio of the PDMSreplica mold. The deformations of thePDMSmold were simulated using the finite element method, and they are consistent with experimental results. The elongated patterns were used as templates to offer new types of colloidal crystal superlattice structures. A proposed pattern-control method will significantly expand the usefulness and diversity of micro/ nanopatterning technology.

Original language	English
Pages (from-to)	12011-12014
Number of pages	4
Journal	Langmuir
Volume	25
Issue number	20
DOIs	https://doi.org/10.1021/la902982y
Publication status	Published - 2009 Oct 20
Externally published	Yes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la902982y

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AB - In this work, we fabricated various patterns using colloidal crystals as master molds via the soft lithography method. Even though colloidal crystals consist of spherical colloidal particles, nonspherical shaped patterns such as rectangular or elongated hexagonal shaped patterns can be fabricated using a stretched polydimethylsiloxane (PDMS) replica mold. The pattern shape and feature size can be easily controlled by changing the stretching axis and ratio of the PDMSreplica mold. The deformations of thePDMSmold were simulated using the finite element method, and they are consistent with experimental results. The elongated patterns were used as templates to offer new types of colloidal crystal superlattice structures. A proposed pattern-control method will significantly expand the usefulness and diversity of micro/ nanopatterning technology.

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Shape and feature size control of colloidal crystal-based patterns using stretched polydimethylsiloxane replica molds

Abstract

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