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[초록]Octopus-Inspired Smart Adhesive Pads_울산과학기술원 고현협 교수

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작성자 최고관리자 작성일18-01-12 09:53 조회522회 댓글0건

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Octopus-Inspired Smart Adhesive Pads 

 

Hyunhyub Ko

 

 

School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan Metropolitan City 44919, Korea

Tel.:82-52-217-2532, E-mail: hyunhko@unist.ac.kr

 

Smart adhesives which stick to and release from a surface on demand have potential

 applications in skin-attachable wearable devices, smart-printing processes,

medical adhesives, and industrial assembly systems. By mimicking the cavity-pressure-

induced adhesion of octopus suckers, here we demonstrate smart adhesive pads, where

thermo-responsive actuation of a hydrogel layer on elastomeric microcavity pads enables

excellent switchable adhesion in response to a thermal stimulus. The smart adhesive pad

exhibits an adhesive strength of 94 kPa and an adhesion switching ratio of ~293 in response

to temperature change between 22 and 61 °C for repeated cycles. As a proof-of-concept

application, the smart adhesive pads have been employed in the transfer printing of

semiconductor micro- and nanomembranes onto arbitrary substrates to fabricate

heterogeneously integrated semiconductor devices. The smart-printed InGaAs transistors

on Si substrates exhibit an excellent field-effect mobility (~2026 cm2·V-1s-1) and on/off

current ratio (~4 × 103), which are among the best for heterogeneous InGaAs transistors,

demonstrating the high efficiency of our smart-printing technique. The bioinspired smart

adhesive system suggested in this study is also applicable to the heterogeneous integration

of arbitrary micro-/nanoscale objects, which has a great potential in the fabrication of high-

performance transistors and optoelectronic devices on heterogeneous or flexible substrates.

Our smart adhesive pads provide a robust platform for applications in wearable devices,

medical adhesives, and assembly of micro- and macro-scale objects in industrial

manipulation systems.

 

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