<P>Frictional energy dissipation at the interfaces of two-dimensional (2D) materials through the excitation and transfer processes of kinetic energy into the bulk can be easily influenced by an intercalated water film. An enhancement of friction...
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https://www.riss.kr/link?id=A107462448
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2019
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SCOPUS,SCIE
학술저널
8827-8835(9쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>Frictional energy dissipation at the interfaces of two-dimensional (2D) materials through the excitation and transfer processes of kinetic energy into the bulk can be easily influenced by an intercalated water film. An enhancement of friction...
<P>Frictional energy dissipation at the interfaces of two-dimensional (2D) materials through the excitation and transfer processes of kinetic energy into the bulk can be easily influenced by an intercalated water film. An enhancement of friction on water-intercalated graphene has been observed. Is this frictional enhancement by confined water a general phenomenon? We address this issue by investigating the frictional behavior of confined water layers intercalated between single-layer molybdenum disulfide (MoS<SUB>2</SUB>), synthesized using chemical vapor deposition, and a silica substrate. The icelike water was intercalated by exposure to high-humidity air. We found that the intercalated water molecules morphologically deform the 2D MoS<SUB>2</SUB> sheet, forming distinct subdomains after the exposure to high humidity. We found that the adsorption of the icelike water layer between the MoS<SUB>2</SUB> and the silica leads to friction enhancement, compared with a pristine MoS<SUB>2</SUB>/silica sample, which is associated with additional phononic friction energy dissipation at the solid-liquid interface, as indicated by the phonon distribution analysis from the empirical force-field calculations. Moreover, the atomic stick-slip behavior shows that the lattice orientation of the hydrophilic MoS<SUB>2</SUB> affects water molecule diffusion at the interface of the MoS<SUB>2</SUB>/silica substrate. Chemical mapping of the water-intercalated MoS<SUB>2</SUB> on silica using scanning photoelectron microscopy and vacuum annealing processes shows water intercalation without changing the intrinsic composition of the MoS<SUB>2</SUB> on silica.</P>
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Management of Triplet Energy and Charge-Transport Properties of Hosts by CN Position Engineering