98%
921
2 minutes
20
This study introduces two-dimensional (2D) TaC and NbC MXenes as outstanding materials for surface-enhanced Raman scattering (SERS) sensing, marking a significant departure from traditional noble-metal substrates. These MXenes exhibit exceptional SERS capabilities, achieving enhancement factors around 10 and detection limits as low as 10 M for various analytes, including environmental pollutants and drugs. The core of their SERS functionality is attributed to the robust interfacial photoinduced charge-transfer interactions between the MXenes and the adsorbed molecules. This deep insight not only advances our understanding of MXene materials in SERS applications but also opens new avenues for developing highly sensitive and selective SERS sensors. The potential of TaC and NbC MXenes to revolutionize SERS technology underscores their importance in environmental monitoring, food safety, and beyond.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1021/acs.langmuir.4c02165 | DOI Listing |
Adv Sci (Weinh)
August 2025
Research and Innovation Center for Graphene and 2D Materials (RIC2D), Khalifa University, P.O. Box 127788, Abu Dhabi, UAE.
This study systematically investigates the modulation mechanism of transition metal elements (Ti, Nb, Ta, V) on the microwave absorption performance of MXenes (TiCT, TiNbCTx, TiTaCT, TiVCT, NbCT, VCT). Using multiscale characterization techniques, the microstructure, elemental distribution, and surface chemical states of these materials are comprehensively analyzed. Integrated electromagnetic parameter measurements and theoretical calculations elucidate the physical mechanisms underlying their distinct microwave absorption behaviors.
View Article and Find Full Text PDFMolecules
April 2025
School of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China.
The laser cladding technique can be adapted to fabricate composite coatings on the surface of the metal substrate, which not only effectively improves the surface properties of materials, but also greatly expands their application range. Metal carbides exhibit extremely high hardness, melting point, and outstanding chemical stability. The hardness of carbides is much higher than that of general metal materials.
View Article and Find Full Text PDFJ Phys Chem C Nanomater Interfaces
October 2024
Industrial Focus Group XUV Optics, MESA+ Institute for Nanotechnology, University of Twente, Drienerlolaan 5, Enschede 7522NB, The Netherlands.
Hydrogen is a crucial element in the green energy transition. However, its tendency to react with and diffuse into surrounding materials poses a significant challenge. Therefore, developing coatings to protect system components in hydrogen environments (molecular, radicals (H*), and plasma) is essential.
View Article and Find Full Text PDFACS Appl Mater Interfaces
June 2024
Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Martí i Franquès 1-11, Barcelona 08028, Spain.
The search for cheap and active materials for the capture and activation of CO has led to many efforts aimed at developing new catalysts. In this context, earth-abundant transition metal carbides (TMCs) have emerged as promising candidates, garnering increased attention in recent decades due to their exceptional refractory properties and resistance to sintering, coking, and sulfur poisoning. In this work, we assess the use of Group 5 TMCs (VC, NbC, and TaC) as potential materials for carbon capture and sequestration/utilization technologies by combining experimental characterization techniques, first-principles-based multiscale modeling, vibrational analysis, and catalytic experiments.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2024
Department of Chemistry, University of North Texas, 1155 Union Circle, No. 305070, Denton, Texas 76203-5017, United States.
Significant interest in the electrocatalytic reduction of molecular nitrogen to ammonia (the nitrogen reduction reaction: NRR) has focused attention on transition metal carbides as possible electrocatalysts. However, a fundamental understanding of carbide surface structure/NRR reactivity relationships is sparse. Herein, electrochemistry, DFT-based calculations, and photoemission studies demonstrate that NbC, deposited by magnetron sputter deposition, is active for NRR at pH 3.
View Article and Find Full Text PDF