title: Ultrafast Heating for Intrinsic Properties of Atomically Thin Two-Dimensional Materials on Plastic Substrates.
abstract: Despite recent progress in producing flexible and stretchable electronics based on two-dimensional (2D) nanosheets, their intrinsic properties are often degraded by the presence of polymeric residues that remain attached to the 2D nanosheet surfaces following fabrication. Further breakthroughs are therefore keenly awaited to obtain clean surfaces compatible with flexible applications. Here, we report a method that allows the 2D nanosheets to be intrinsically integrated onto flexible substrates. The method involves thermal decomposition of polymeric residues by microwave-induced ultrafast heating of the surface without affecting the underlying flexible substrate. Mapping the C═O stretching mode by Fourier-transform infrared spectroscopy in combination with atomic force microscopy confirms elimination of the polymeric residues from the 2D nanosheet surface. Flexible devices prepared using microwave-cleaned 2D nanosheets show enhanced electrical, optical, and electrothermal performances. This simple technique is applicable to a wide range of 2D nanomaterials and represents an important advance in the field of flexible devices.
authors: Nano Carbon Materials Research Group, Korea Electrotechnology Research Institute , Changwon 641-120, Korea.|Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Sungkyunkwan University , Suwon 440-746, Korea.
authors: Ho Young
authors: HY
authors: Kim
authors: Nano Carbon Materials Research Group, Korea Electrotechnology Research Institute , Changwon 641-120, Korea.|Department of Physics, Pusan National University , Busan 609-735, Korea.
authors: Jae-Won
authors: JW
authors: Lee
authors: Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Sungkyunkwan University , Suwon 440-746, Korea.
authors: Hye Min
authors: HM
authors: Oh
authors: Nano Carbon Materials Research Group, Korea Electrotechnology Research Institute , Changwon 641-120, Korea.
authors: Kang-Jun
authors: KJ
authors: Baeg
authors: Nano Carbon Materials Research Group, Korea Electrotechnology Research Institute , Changwon 641-120, Korea.
authors: Sunshin
authors: S
authors: Jung
authors: Department of Physics, Pusan National University , Busan 609-735, Korea.
authors: Ho-Soon
authors: HS
authors: Yang
authors: Institute of Advanced Composite Materials, Korea Institute of Science and Technology , Jeonbuk 565-905, Korea.
authors: Wonki
authors: W
authors: Lee
authors: Institute of Advanced Composite Materials, Korea Institute of Science and Technology , Jeonbuk 565-905, Korea.
authors: Jun Yeon
authors: JY
authors: Hwang
authors: Department of Physics and Graphene Research Institute, Sejong University , Seoul 05006, Korea.
authors: Keun Soo
authors: KS
authors: Kim
authors: Nano Carbon Materials Research Group, Korea Electrotechnology Research Institute , Changwon 641-120, Korea.
authors: Seung Yol
authors: SY
authors: Jeong
authors: Nano Carbon Materials Research Group, Korea Electrotechnology Research Institute , Changwon 641-120, Korea.
authors: Joong Tark
authors: JT
authors: Han
authors: Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS), Sungkyunkwan University , Suwon 440-746, Korea.
authors: Mun Seok
authors: MS
authors: Jeong
authors: Nano Carbon Materials Research Group, Korea Electrotechnology Research Institute , Changwon 641-120, Korea.
authors: Geon-Woong
authors: GW
authors: Lee
authors: Nano Carbon Materials Research Group, Korea Electrotechnology Research Institute , Changwon 641-120, Korea.
authors: Hee Jin
authors: HJ
authors: Jeong
keywords: 2D nanomaterial; flexible device; microwave; selective heating; ultrafast heating