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Ko, Hyunhyub
Functional Nanomaterials & Devices Lab.
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Transparent and conductive nanomembranes with orthogonal silver nanowire arrays for skin-attachable loudspeakers and microphones

Author(s)
Kang, SaewonCho, SeungseShanker, RaviLee, HochanPark, JonghwaUm, Doo-SeungLee, YoungohKo, Hyunhyub
Issued Date
2018-08
DOI
10.1126/sciadv.aas8772
URI
https://scholarworks.unist.ac.kr/handle/201301/24392
Fulltext
http://advances.sciencemag.org/content/4/8/eaas8772
Citation
SCIENCE ADVANCES, v.4, no.8, pp.eaas8772
Abstract
We demonstrate ultrathin, transparent, and conductive hybrid nanomembranes (NMs) with nanoscale thickness, consisting of an orthogonal silver nanowire array embedded in a polymer matrix. Hybrid NMs significantly enhance the electrical and mechanical properties of ultrathin polymer NMs, which can be intimately attached to human skin. As a proof of concept, we present a skin-attachable NM loudspeaker, which exhibits a significant enhancement in thermoacoustic capabilities without any significant heat loss from the substrate. We also present a wearable transparent NM microphone combined with a micropyramid-patterned polydimethylsiloxane film, which provides excellent acoustic sensing capabilities based on a triboelectric voltage signal. Furthermore, the NM microphone can be used to provide a user interface for a personal voice-based security system in that it can accurately recognize a user’s voice. This study addressed the NM-based conformal electronics required for acoustic device platforms, which could be further expanded for application to conformal wearable sensors and health care devices.
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
ISSN
2375-2548
Keyword
BY-LAYER FILMSTHIN-FILMELECTRODESGRAPHENECOMPOSITESULTRATHINSENSORSDESIGNNANOGENERATORLIGHTWEIGHT

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