Souri, Hamid Yu, Seong Jun Yeo, Hyeonuk Goh, Munju Hwang, Jun-Yeon Kim, Seung Min Ku, Bon-Cheol Jeong, Young Gyu You, Nam-Ho 2024-01-20T04:31:09Z 2024-01-20T04:31:09Z 2021-09-03 2016-05 2046-2069 https://pubs.kist.re.kr/handle/201004/124148 In this work, a novel film heater in nanometer-scale thickness based on catalyst-free and transfer-free carbon nanosheets (CNSs) with properties similar to graphene is fabricated. Here, poly(amic acid) (PAA), which is composed of several aromatic hydrocarbon rings, is used as the carbon precursor of CNS films. Altering the polymer concentration easily controls the morphological, optical, and electrical properties of the CNS films obtained by carbonization of PAA thin films. The CNS films with different thicknesses of 7.53-28.40 nm are simply prepared through spin-coating on a quartz substrate and post heat-treatment. Finally, their direct use as transparent film heaters is deeply investigated by considering electrical conductivity, temperature response rapidity, achievable maximum temperature, and electric power efficiency. For instance, an electrically conductive and optically transparent CNS film with 28.40 nm thickness exhibits excellent electric heating performance achieving well-defined steady-state maximum temperatures of 24-333 degrees C at low input electric power per unit film area of 0.027-1.005 W cm(-2) in a relatively short time of similar to 100 s. English ROYAL SOC CHEMISTRY P ALLOY-FILMS GRAPHENE OXIDE THERMAL-CONVERSION CHEMICAL-REDUCTION POLYBENZOXAZOLE PERFORMANCE COMPOSITES SIZE NANOCOMPOSITES FABRICATION A facile method for transparent carbon nanosheets heater based on polyimide Article 10.1039/c6ra07457j 1 RSC ADVANCES, v.6, no.58, pp.52509 - 52517 RSC ADVANCES 6 58 52509 52517 scie scopus 000378563200001 2-s2.0-84973293508 Chemistry, Multidisciplinary Chemistry Article P ALLOY-FILMS GRAPHENE OXIDE THERMAL-CONVERSION CHEMICAL-REDUCTION POLYBENZOXAZOLE PERFORMANCE COMPOSITES SIZE NANOCOMPOSITES FABRICATION polyimide carbon sheet film heater