Publications by authors named "FengXue Tan"
Rational design of MoS2/CNT heterostructure with rich S-vacancy for enhanced HER performance.
J Chem Phys
November 2024
Molybdenum disulfide (MoS2) is a promising electrocatalyst for the hydrogen evolution reaction (HER) due to excellent stability and low cost. However, the utilization in electrocatalytic hydrogen evolution is constrained by inherent shortcomings, including fewer edge active sites, poor dispersion, and electrical conductivity. In this work, MoS2 was compounded with carbon nanotubes (CNTs), which are known for their high specific surface area and excellent electrical conductivity.
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- Two-dimensional molybdenum disulfide (2D MoS) has potential for surface-enhanced Raman scattering (SERS) due to strong exciton resonance, but its inert basal plane hinders effectiveness.
- A new one-step synthesis method introduces atomic defects, specifically single sulfur vacancies, by using NaCl, which facilitates both rapid growth and defect formation during cooling.
- SERS tests show that the defect-rich MoS can detect rhodamine 6G at 10m concentrations, comparable to noble metal substrates, indicating this activation strategy could improve performance in various applications beyond SERS.
Anomalous hybridized excitons induced by combined effects of Van der Waals coupling and Rashba spin-orbit coupling.
Nanotechnology
September 2024
Article Synopsis
- MoS is a promising transition-metal dichalcogenide noted for its stability and physicochemical properties, making it ideal for visible optoelectronic devices.
- Traditional bandgap engineering in heterostructures has limitations, as the energy levels of bands do not significantly change, restricting their applications.
- This research introduces a MoS/MoWC heterostructure that utilizes Van der Waals coupling and Rashba spin-orbit coupling to create hybridized excitons with a low energy of 0.65 eV, opening up new possibilities for infrared-region devices.