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Updated: May 13, 2026
Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles
Published on: November 27, 2015
Solvent-Assisted Molten Salt-Derived Tungsten Nitride Microflowers Assembled from Highly Crystalline Nanosheets with
Yang Yu1,2, Linchangqing Yang2, Qinghong Kong1
1School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
Abstract:
Traditional two-dimensional transition-metal nitrides used for surface-enhanced Raman scattering (SERS) suffer from difficulties in tuning their localized surface plasmon resonance (LSPR) effect, which does not match commonly used laser wavelengths, resulting in a low Raman enhancement factor and making trace detection challenging. A solvent-assisted molten salt technique is proposed to fabricate tungsten nitride (WN) microflowers assembled from a highly crystalline nanosheet with a large specific surface area of 82.1 m2/g. Using rhodamine 6G as a probe molecule, the substrate achieves a limit of detection as low as 2 × 10-11 M and an enhancement factor of 5.6 × 107, outperforming most nonprecious semiconductor SERS substrates. The excellent enhancement effect originates from the physical enhancement brought about by its LSPR effect. These WN microflowers exhibit excellent SERS performance and remarkable LSPR characteristics, while showing high sensitivity to typical high-risk environmental pollutants. They also possess excellent signal reproducibility, robust chemical stability, and strong anti-interference capability.
