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Superior anti-icing strategy by combined sustainable liquid repellence and electro/photo-responsive thermogenesis of oil/MWNT composite

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Journal of Materials Science & Technology 2020年第14期47卷 106-116页

作者： Aeree kim seonghyeon kim Myoung Huh Hyungmo kim Chan Lee Department of Mechanical Engineering Pohang University of Science and Technology(POSTECH)Pohang37673Republic of Korea Korea Atomic Energy Research Institute(KAERI) Daejeon34057Republic of Korea

This paper introduces an effective anti-icing strategy that uses passive anti-icing property and active de-icing functions *** dual capabilities can alleviate the icing problem more effectively than either a passive or active function *** developed material is a slippery liquid-repellent elastic conductor(SLEC);it is an organogel that is composed of multi-walled carbon nanotubes,oil,and *** SLEC maintains passive water-droplet sliding ability even on wet surfaces that frequently occur in cold conditions(e.g.,during condensation and defrosting),suppresses ice nucleation,and shows ice adhesion strength as low as^20 *** SLEC releases heat when it is subject to electrical or photonic stimulation,and can therefore it can prevent ice formation and melt ice that has already formed on a *** material has sustainable liquid repellence by syneresis and replenishment;this ability ensures long-lasting anti-icing property,and results in exceptional *** durability is stable against mechanical *** superior dual anti-icing capabilities together with the sustainable and stable liquid repellence should generate synergistic effects,and yield a powerful anti-icing tool that can broaden the range of icing applications.

关键词： Anti-icing De-icing Icephobic Soft conductor Self-healing Nanocomposite Liquid repellence

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Massively parallel direct writing of nanoapertures using multi-optical probes and super-resolution near-fields

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Microsystems & Nanoengineering 2022年第5期8卷 257-267页

作者： Changsu Park Soobin Hwang Donghyun kim Nahyun Won Runjia Han seonghyeon Jeon Wooyoung Shim Jiseok Lim Chulmin Joo Shinill Kang School of Mechanical Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Korea National Center for Optically-Assisted High Precision Mechanical Systems Yonsei UniversitySeoul 03722Korea Department of Materials Science and Engineering Yonsei University50 Yonsei-roSeodaemun-guSeoul 03722Korea School of Mechanical Engineering Yeungnam University280 Daehak-roGyeongsanGyungbuk 38541South Korea

Laser direct-writing enables micro and nanoscale patterning,and is thus widely used for cutting-edge research and industrial *** nanolithography methods,such as near-field,plasmonic,and scanning-probe lithography,are gaining increasing attention because they enable fabrication of high-resolution nanopatterns that are much smaller than the wavelength of ***,conventional methods are limited by low throughput and scalability,and tend to use electron beams or focused-ion beams to create *** this study,we developed a procedure for massively parallel direct writing of nanoapertures using a multi-optical probe system and superresolution near-fields.A glass micro-Fresnel zone plate array,which is an ultra-precision far-field optical system,was designed and fabricated as the multi-optical probe *** a chalcogenide phase-change material(PCM),multiple layers of Sb_(65)Se_(35) were used to generate the super-resolution near-field effect.A nanoaperture was fabricated through direct laser writing on a large-area(200×200mm^(2))multi-layered PCM.A photoresist nanopattern was fabricated on an 8-inch wafer via near-field nanolithography using the developed nanoaperture and an i-line commercial exposure *** other methods,this technique allows high-throughput large-area nanolithography and overcomes the gap-control issue between the probe array and the patterning surface.

关键词： lithography optical resolution

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Hydrophobic surface induced pro-metastatic cancer cells for in vitro extravasation models

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Bioactive Materials 2024年第4期34卷 401-413页

作者： Minseok Lee Seunggyu kim Sun Young Lee Jin Gyeong Son Joonha Park seonghyeon Park Jemin Yeun Tae Geol Lee Sung Gap Im Jessie S.Jeon Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and TechnologyDaehak-ro 291Yuseong-guDaejeon34141Republic of Korea Department of Mechanical Engineering Korea Advanced Institute of Science and TechnologyDaehak-ro 291Yuseong-guDaejeon34141Republic of Korea Bioimaging Team Safety Measurement InstituteKorea Research Institute of Standards and Science(KRISS)Gajeong-ro 267Yuseong-guDaejeon34113Republic of Korea KAIST Institute for the NanoCentury(KINC) Korea Advanced Institute of Science and TechnologyDaehak-ro 291Yuseong-guDaejeon34141Republic of Korea

In vitro vascularized cancer models utilizing microfluidics have emerged as a promising tool for mechanism study and drug ***,the lack of consideration and preparation methods for cancer cellular sources that are capable of adequately replicating the metastatic features of circulating tumor cells contributed to low relevancy with in vivo experimental ***,we show that the properties of cancer cellular sources have a considerable impact on the validity of the in vitro metastasis ***,with a hydrophobic surface,we can create highly metastatic spheroids equipped with aggressive invasion,endothelium adhesion capabilities,and activated metabolic *** these metastatic spheroids with the well-constructed microfluidic-based extravasation model,we validate that these metastatic spheroids exhibited a distinct extravasation response to epidermal growth factor(EGF)and normal human lung fibroblasts compared to the 2D cultured cancer cells,which is consistent with the previously reported results of in vivo ***,the applicability of the developed model as a therapeutic screening platform for cancer extravasation is validated through profiling and inhibition of *** believe this model incorporating hydrophobic surface-cultured 3D cancer cells provides reliable experimental data in a clear and concise manner,bridging the gap between the conventional in vitro models and in vivo experiments.

关键词： Initiated chemical vapor deposition Cancer spheroid Cancer extravasation Organ-on-a-chip In vitro disease model

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