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RISS 인기검색어
- 검색키워드
- 저자 : Sangyul BAIK (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
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Baik, Sangyul,Lee, Heon Joon,Kim, Da Wan,Min, Hyeongho,Pang, Changhyun American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.29
<P>Mimicking the attachment of octopus suction cups has become appealing for the development of skin/organ adhesive patches capable of strong, reversible adhesion in dry and wet conditions. However, achieving high conformity against the three-dimensionally (3D) rough and curved surfaces of the human body remains an enduring challenge for further medical applications of wound protection, diagnosis, or therapeutics. Here, an adhesive patch inspired by the soft wrinkles of miniaturized 3D octopus suction cups is presented for high drainability and robust attachment against dry and wet human organs. Investigating the structural aspects of the wrinkles, a simple model is developed to maximize capillary interactions of the wrinkles against wet substrates. A layer of soft siloxane derivative is then transferred onto the wrinkles to enhance fixation against dry and sweaty skin as well as various wet organ surfaces. Our bioinspired patch offers opportunities for enhancing the versatility of adhesives for developing skin- and/or organ-attachable devices.</P> [FIG OMISSION]</BR>
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A wet-tolerant adhesive patch inspired by protuberances in suction cups of octopi
Baik, Sangyul,Kim, Da Wan,Park, Youngjin,Lee, Tae-Jin,Ho Bhang, Suk,Pang, Changhyun Nature Publishing Group 2017 Nature Vol. No.
<P>Adhesion strategies that rely on mechanical interlocking or molecular attractions between surfaces can suffer when coming into contact with liquids(1,2). Thus far, artificial wet and dry adhesives have included hierarchical mushroom-shaped or porous structures that allow suction or capillarity(3-6), supramolecular structures comprising nanoparticles(7), and chemistry-based attractants that use various protein polyelectrolytes(8-10). However, it is challenging to develop adhesives that are simple to make and also perform well- and repeatedly-under both wet and dry conditions, while avoiding non-chemical contamination on the adhered surfaces(11). Here we present an artificial, biologically inspired, reversible wet/dry adhesion system that is based on the dome-like protuberances found in the suction cups of octopi. To mimic the architecture of these protuberances(12-14), we use a simple, solution-based, air-trap technique that involves fabricating a patterned structure as a polymeric master, and using it to produce a reversed architecture, without any sophisticated chemical syntheses or surface modifications. The micrometre-scale domes in our artificial adhesive enhance the suction stress. This octopus-inspired system exhibits strong, reversible, highly repeatable adhesion to silicon wafers, glass, and rough skin surfaces under various conditions (dry, moist, under water and under oil). To demonstrate a potential application, we also used our adhesive to transport a large silicon wafer in air and under water without any resulting surface contamination.</P>
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