Localised strain and doping of 2D materials

Abstract

There is a growing interest in 2D materials-based devices as the replacement for established materials, such as silicon and metal oxides in microelectronics and sensing, respectively. However, the atomically thin...

Vertical heterostructure of graphite–MoS2 for gas sensing

“…3b exclusively for atomic layer investigation, carried out separately, exposing the derivative of exposed ions (i.e nitronium and ammonium). The mechanical strain and the electrical doping in MoS 2 can be related by a linear transformation of the peak shifts of E 1 2g and A 1g as described in our previous findings, 42,43 and the strain and doping axis can then be constructed by taking negligible doping and strain respectively (see ESI† S5 for details). The projection of the peak position deviations (from the doped-free and strain-free intersection point) to the strain and doping axis represents the localised strain and doping of MoS 2 , enabling the successful deconvolution of strain and doping in MoS 2 after the exposure of analytes.…”

Recent advances of doping strategy for boosting the electrocatalytic performance of two-dimensional noble metal nanosheets

“…Recently, two-dimensional (2D) materials attract researchers for their unique properties, 2D NMCs featured with their exceptionally large specific surface areas, massive exposed surface atoms, and extremely adjustable microstructure, offering abundant active sites and high atomic utilization [21,22], which is extremely beneficial for catalytic reaction. Meanwhile, some synergic strategies have been prescribed for improving the intrinsic activity of 2D NMCs, such as morphology engineering, defect engineering, strain engineering, surface engineering, doping engineering and alloying engineering (figure 1) [23][24][25]. Particularly, heteroatom doping strategy is proven an effective way to enhance the intrinsic activity of electrocatalysts by modulating their electronic structures, and thus has aroused extensive research interests.…”