CVD-graphene-based flexible, thermoelectrochromic sensor
PBN-AR
Instytucja
Wojskowy Instytut Techniki Inżynieryjnej im. profesora Józefa Kosackiego
Informacje podstawowe
Główny język publikacji
angielski
Czasopismo
Journal of Nanomaterials (30pkt w roku publikacji)
ISSN
1687-4110
EISSN
1687-4129
Wydawca
HINDAWI PUBLISHING CORPORATION
DOI
URL
Rok publikacji
2017
Numer zeszytu
Strony od-do
1-8
Numer tomu
Link do pełnego tekstu
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Open access
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Creative Commons — Uznanie autorstwa-Niekomercyjne-Na tych samych warunkach
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Razem z publikacją
Streszczenia
Język
angielski
Treść
The main idea behind this work was demonstrated in a form of a new thermo-electrochromic sensor on a flexible substrate using graphene as an electrically reconfigurable thermal medium (TEChromTM). Our approach relies on electro-modulation of thermal properties of graphene on poly(ethylene terephthalate) (PET) via mechanical destruction of a graphene layer. Graphene applied in this work was obtained by chemical vapor deposition (CVD) technique on Copper substrate at the temperature of 1000 ºC in Ar+H2 atmosphere using methane as the carbon precursor. The synthesized graphene was fully characterized by Ramman spectroscopy, scanning electron microscopy, scanning tunneling spectroscopy and an extension of scanning tunneling microscopy. Electrical parameters of graphene were evaluated by the van der Pauw method on the transferred graphene layers onto SiO2 substrates by electrochemical delamination method. Two configurations of architecture of sensors: without- and with the thermochromic layer were investigated, taking into account the increase of voltage from 0 to 50 V. Multicolor stripes with leuco dyes were used as thermochromic material. Electrical properties of devices were investigated along with increase of the area of mechanical damage in graphene layer and observed by thermographic camera to define heat energy. Current-voltage characteristics obtained for the sensor with damaged graphene layer are linear, and the resistivity is independent from the current applied. The device investigated under 1000 W/m2 exhibited rise of resistivity along with increased temperature. Flexible thermo-electrochromic device with graphene presented here can be widely used as a sensor for both the military and civil monitoring.
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System-identifier
PX-59899d02d5de24241ad6311b
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