C
Chang-Sik Ha
Researcher at Pusan National University
Publications - 748
Citations - 25581
Chang-Sik Ha is an academic researcher from Pusan National University. The author has contributed to research in topics: Polyimide & Mesoporous material. The author has an hindex of 62, co-authored 733 publications receiving 22755 citations. Previous affiliations of Chang-Sik Ha include University at Buffalo & National University of Singapore.
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A strong regioregularity effect in self-organizing conjugated polymer films and high-efficiency polythiophene:fullerene solar cells
Youngkyoo Kim,Steffan Cook,Sachetan M. Tuladhar,Stelios A. Choulis,Jenny Nelson,James R. Durrant,Donal D. C. Bradley,Mark Giles,Iain McCulloch,Chang-Sik Ha,Moonhor Ree +10 more
TL;DR: In this article, the influence of polymer regioregularity (RR) on the molecular nanostructure, and hence on the resulting material properties and device performance has been investigated, which can be attributed to enhanced optical absorption and transport resulting from the organization of P3HT chains and domains.
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Advanced polyimide materials: Syntheses, physical properties and applications
TL;DR: Polyimides rank among the most heat-resistant polymers and are widely used in high temperature plastics, adhesives, dielectrics, photoresists, nonlinear optical materials, membrane materials for separation, and Langmuir-Blodgett (LB) films, among others as mentioned in this paper.
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Bio-nanocomposites for food packaging applications
TL;DR: The most promising nanoscale fillers are layered silicate nanoclays such as montmorillonite and kaolinite as mentioned in this paper, which can provide active and/or smart properties to food packaging systems.
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Polymers for flexible displays: From material selection to device applications
TL;DR: In this paper, the kinds of polymers that are used, where and how polymer materials are used and the challenges to overcome in developing flexible displays are discussed and discussed in detail.
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Tensile, water vapor barrier and antimicrobial properties of PLA/nanoclay composite films
TL;DR: In this paper, the tensile strength, elongation at break (E ), and water vapor permeability (WVP) of control PLA-based composite films with different types of nanoclays, such as Cloisite Na +, Cloisitic 30B and Cloisitesite 20A, were tested using a solvent casting method and their tensile, water vapor barrier and antimicrobial properties were tested.