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Your search keyword '"Ko, Hao‐Wen"' showing total 21 results
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21 results on '"Ko, Hao‐Wen"'

13. Macromol. Rapid Commun. 5/2015

Author

Ko, Hao-Wen, primary, Chi, Mu-Huan, additional, Chang, Chun-Wei, additional, Su, Chun-Hsien, additional, Wei, Tzu-Hui, additional, Tsai, Chia-Chan, additional, Peng, Chi-How, additional, and Chen, Jiun-Tai, additional

Published
2015
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20. Microwave-annealing-induced nanowetting of block copolymers in cylindrical nanopores.

Author

Chang CW, Cheng MH, Ko HW, Chu CW, Tu YH, and Chen JT

Abstract

Block copolymers have attracted great attention because of their abilities to self-assemble into well-ordered microphase-separated structures. To generate nanopatterns of block copolymers with long-range ordering and low-defect densities in shorter time scales, microwave annealing has recently been applied. Microwave annealing, however, has so far only been used for block copolymer bulks and thin films. In this work, we discover that microwave annealing can be successfully applied to three-dimensional block copolymer nanostructures by studying the infiltration and microphase separation of block copolymers in cylindrical nanopores upon microwave irradiation. Cylinder-forming and lamella-forming poly(styrene-block-dimethylsiloxane) (PS-b-PDMS) are introduced into the nanopores of anodic aluminum oxide (AAO) templates. In addition, AAO templates with different pore sizes are used to study the effect of the commensurabilities between the pore diameters and the repeating periods of the block copolymers on the morphologies of the block copolymer nanostructures.

Published
2017
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21. Fabrication of Core-Shell Polymer Nanospheres in the Nanopores of Anodic Aluminum Oxide Templates Using Polymer Blend Solutions.

Author

Ko HW, Chi MH, Chang CW, Chu CW, Luo KH, and Chen JT

Abstract

Spherical core-shell structures have been widely investigated in recent years, and they can be used for various applications, such as drug delivery, biological labeling, and batteries. Although many methods have been developed to prepare core-shell structures, it is still a great challenge to fabricate core-shell structures in the nanoscale with well-controlled morphologies and sizes. In this work, we present a simple method to fabricate core-shell polymer nanospheres consisting of polystyrene (PS) cores and poly(methyl methacrylate) (PMMA) shells. The nanostructures are prepared by a solution-based template wetting method. After the nanopores of anodic aluminum oxide (AAO) templates are wetted sequentially by PS/PMMA blend solutions and water, the core-shell nanostructures can be formed. The formation process is related to the Rayleigh-instability-type transformation. Selective removal techniques are also used to confirm the morphologies of the core-shell nanostructures.

Published
2015
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