文献类型：期刊文献

英文题名：Molybdenum Boride MBene with an Ultraclean Surface for Stable and Portable Detection of Environment Toxins

作者：Zhang, Weida[1,2,3];Peng, Yusi[1,2];Wang, Chunli[4];Zhang, Liangzhu[4];Xu, Meimei[1,2,3];Zhao, Shuai[1,2,3];Li, Dan[1,2,3];Yang, Yong[1,2]

机构：[1]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine M, Shanghai 200050, Peoples R China;[2]Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China;[3]Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China;[4]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：10

期号：9

起止页码：6950

外文期刊名：ACS SENSORS

收录：;EI(收录号：20253919247976);WOS:【SCI-EXPANDED(收录号:WOS:001551078400001)】；

基金：This work is supported by the National Key Research and Development Program (Grant Nos. 2022YFE0110100 & 2023YFC3041100), the National Natural Science Foundation of China (No. 52172167), and Shanghai Sailing Program (No. 23YF1454600). Additionally, the three lattice element images under high, low, and room temperature conditions in Figure 1, as well as the figure of the scientist conducting outdoor detection in Figure 5, were generated using artificial intelligence tools. These images were created through the commands "Generate lattice element diagrams under high/low/room temperature conditions" and "Generate a diagram of a scientist conducting outdoor field detection".

语种：英文

外文关键词：SERS; MBene; ultraclean surface; ricin; portable

摘要：The inherently poor chemical stability and sensitivity of two-dimensional MXene materials pose significant challenges for their application in non-noble metal surface enhanced Raman scattering (SERS) under harsh conditions. Herein, a novel unfunctionalized Mo4/3B2 MBene with an ultraclean surface is reported as a stable, ultrasensitive SERS substrate for portable detection of environment toxins. The Mo4/3B2 MBene enables the detection of R6G down to 10-11 M with an SPF of 4.23 x 105, surpassing most MXene substrates, and its SERS mechanism is mainly attributed to the synergistic effects of enhanced charge transfer efficiency promoted by the ultraclean surface and vacancy modulated photon induced charge transfer resonance. Moreover, it exhibits excellent long-term SERS enhanced stability, which can maintain 86%, 75%, and 61% of its initial SERS performance after 45 days of storage at room temperature and 14 days of storage at low (-26 degrees C) and high (100 degrees C) temperatures. Notably, a portable Raman system based on Mo4/3B2 demonstrates ultrasensitive detection of the ricin A chain in real river water, achieving a concentration limit of 0.01 mu g/mL and 97.8% accuracy assisted by the developed Transformer model. This work offers new insights for designing stable and sensitive MBene-based SERS substrates for field-deployable sensing in security and public health scenarios.