A wide bandgap is an essential requirement for a nonlinear optical (NLO) material. However, it is very challenging to simultaneously engineer a wide bandgap and a strong second-harmonic generation (SHG)...
Until now, superhydrophobic materials that are scale-up fabrication and application to harsh environments remain challenging because of their fragile mechanical durability. Because of their unique electronic structure, rare-earth oxides (REOs) have been proven to be intrinsically hydrophobic. Herein, cerium oxide particles (CeO 2) are added to the coating by coelectrodeposition. The Co-Ni/CeO 2 composite coating from the electrolyte containing 3.44 g L À1 possesses a flower-like hierarchical structure, displaying a superhydrophobic behavior after the modification by 1H,1H,2H,2H-perfluorooctyltrichlorosilane (PFTEOS). More importantly, excellent mechanical durability with critical abrasion distance of 22.5 m is achieved under a 5 kPa fixed normal pressure in the liner abrasion test before the loss of superhydrophobicity. Also, electrochemical measurements demonstrate that the superhydrophobic composite coatings display high corrosion resistance.
We predict the CH
4
-sensing performance of monolayer MoX
2
(S, Se, Te) with X-vacancy, Mo-vacancy, and divacancy by the density functional theory (DFT). The results demonstrate that the combination of different sixth main group elements with Mo atom has different adsorption behaviors for CH
4
gas molecule. Compared with MoX
2
, MV
X
, MV
Mo
, and MV
D
generally exhibit better adsorption properties under the same conditions. In addition, different defects will have different effects on adsorption behavior of the systems, the MV
D
(MoTe
2
) has the better adsorption, the better charge transfer, and the shortest distance in these systems. The results are proposed to predict the CH
4
gas molecule adsorption properties of MV
D
(MoTe
2
) and would help in guiding experimentalists to develop better materials based on MoX
2
for efficient gas detection or sensing applications.
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