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Mechanically reconfigurable architectured graphene for tunable plasmonic resonances

Light(Science & Applications) 2018年第1期7卷 895-903页

作者： pilgyu kang Kyoung-Ho Kim Hong-Gyu Park SungWoo Nam Department of Mechanical Science and Engineering University of Illinois at Urbana-ChampaignUrbanaIL 61801USA Department of Mechanical Engineering George Mason UniversityFairfaxVA 22030USA Department of Physics Korea UniversitySeoul 02841Republic of Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoul 02841Republic of Korea

Graphene nanostructures with complex geometries have been widely explored for plasmonic applications,as their plasmonic resonances exhibit high spatial confinement and gate ***,edge effects in graphene and the narrow range over which plasmonic resonances can be tuned have limited the use of graphene in optical and optoelectronic *** we present a novel approach to achieve mechanically reconfigurable and strongly resonant plasmonic structures based on crumpled *** calculations show that mechanical reconfiguration of crumpled graphene structures enables broad spectral tunability for plasmonic resonances from mid-to nearinfrared,acting as a new tuning knob combined with conventional electrostatic ***,a continuous sheet of crumpled graphene shows strong confinement of plasmons,with a high near-field intensity enhancement of~1×10^(4).Finally,decay rates for a dipole emitter are significantly enhanced in the proximity of finite-area biaxially crumpled graphene *** findings indicate that crumpled graphene provides a platform to engineer graphenebased plasmonics through broadband manipulation of strong plasmonic resonances.

关键词： plasmon figuration proximity

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Uniaxially crumpled graphene as a platform for guided myotube formation

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Microsystems & Nanoengineering 2019年第1期5卷 144-153页

作者： Junghoon Kim Juyoung Leem Hong Nam Kim pilgyu kang Jonghyun Choi Md Farhadul Haque Daeshik kang SungWoo Nam Department of Mechanical Science and Engineering University of Illinois at Urbana-ChampaignUrbanaIL 61801USA Center for BioMicrosystems Brain Science InstituteKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Division of Bio-Medical Science and Technology KIST SchoolKorea University of Science and TechnologySeoul 02792Republic of Korea Department of Mechanical Engineering George Mason UniversityFairfaxVA 22030USA Department of Mechanical Engineering Ajou UniversitySuwon 16499Republic of Korea Department of Materials Science and Engineering University of Illinois at Urbana-ChampaignUrbanaIL 61801USA

Graphene,owing to its inherent chemical inertness,biocompatibility,and mechanical flexibility,has great potential in guiding cell behaviors such as adhesion and ***,due to the two-dimensional(2D)nature of graphene,the microfabrication of graphene into micro/nanoscale patterns has been widely adopted for guiding cellular *** this study,we report crumpled graphene,i.e.,monolithically defined graphene with a nanoscale wavy surface texture,as a tissue engineering platform that can efficiently promote aligned C2C12 mouse myoblast cell *** imparted out-of-plane,nanoscale crumpled morphologies to flat graphene via compressive straininduced *** C2C12 mouse myoblast cells were seeded on the uniaxially crumpled graphene,not only were the alignment and elongation promoted at a single-cell level but also the differentiation and maturation of myotubes were enhanced compared to that on flat *** results demonstrate the utility of the crumpled graphene platform for tissue engineering and regenerative medicine for skeletal muscle tissues.

关键词： Uniaxial graphene alignment

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