Author
Claudio Terraza Inostroza
Bio: Claudio Terraza Inostroza is an academic researcher from Pontifical Catholic University of Chile. The author has contributed to research in topics: Coating & Dip-coating. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.
Topics: Coating, Dip-coating
Papers
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TL;DR: Smart wrinkled hydrogel patterns with modulated chemical composition and wrinkle characteristics were formed by taking advantage of surface instabilities using a simple, cost-affordable, and robust method.
4 citations
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Journal Article•
TL;DR: In this paper, the authors developed a PDMS-SMA composite whose surface micro wrinkles can be dynamically programmed by an electrical current supplied to the SMA wire, and the experimental results agree with the theoretical model.
Abstract: We report on the development of a PDMS-SMA composite whose surface micro wrinkles can be dynamically programmed by an electrical current supplied to the SMA wire. It is advantageous over other techniques for surface topographical modulation, including portability, real-time programmability, no requirement for specific surface chemistry, operability under ambient conditions, and relative ease of control. A simplified mechanical model is also developed to describe the force-deflection balance of the PDMS-SMA composite. The wavelengths and amplitudes of the wrinkles when different currents applied to the SMA are characterized, and the experimental results agree with the theoretical model. The developed composite device can be applied to programmable modulations of surface adhesion, friction, wettability, etc.
10 citations
Journal Article•
TL;DR: In this paper, the authors identify the conditions for selecting the favored buckling modes for elastic films on elastic substrates and show that the transition from one buckling mode to another is predicted as the stiffness ratio between the substrate and the film or is predicted for variation of the stiffness ratio between a substrate and a film.
Abstract: Two buckling modes have been observed in thin films: buckle delamination and wrinkling. This letter identifies the conditions for selecting the favored buckling modes for elastic films on elastic substrates. Transition from one buckling mode to another is predicted as the stiffness ratio between the substrate and the film or is predicted for variation of the stiffness ratio between the substrate and the film or variation of theinterfacial defect size. The theoretical results are demonstrated experimentally by observing the coexistence of both buckling modes and mode transition in one film-substrate system.
10 citations
TL;DR: A review of recent developments in different types of wrinkled soft substrates, their preparation, and emergent applications can be found in this article , where the authors briefly summarized and commented on recent developments and their applications.
Abstract: Morphology of soft materials, including those of natural systems has great influence in controlling their surface functionalities and responses to external stimuli. Surface morphological features of natural soft systems are produced through controlled cell growth and tissue growth. Artificial systems capable of emulating the morphology-dependent physicochemical responses of natural soft substrates can be prepared through various methods such as surface oxidation, thermal stress, compressive stress, etc. Wrinkling is an important morphological irregularity on soft substrates which can be leveraged in this direction. Wrinkling in artificial soft systems can be achieved through several experimental strategies such as compressive stress, thermal stress, surface oxidation, etc. The tunable, reversible and responsive nature of wrinkled soft substrates make them a potential tool for numerous applications in electronics, optics, adhesives, etc. In this review, have briefly summarized and commented on recent developments in different types of wrinkled soft substrates, their preparation, and emergent applications.
2 citations