Laser constructed vacancy-rich TiO_(2-x)/Ti microfiber via enhanced interfacial charge transfer for operando extraction-SERS sensing  

作　　者：Ying Hou Zhen Liu Xiaoyan Liu Zhiwei Sun Zenan Wang Hong Liu Weijia Zhou 

机构地区：[1]Institute for Advanced Interdisciplinary Research(iAIR),School of Chemistry and Chemical Engineering,University of Jinan,Ji’nan 250022,China [2]State Key Laboratory of Crystal Materials,Shandong University,Ji’nan 250100,China [3]Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China

出　　处：《Chinese Chemical Letters》2024年第9期187-192,共6页中国化学快报（英文版）

基　　金：supported by National Key Research and Development Program of China(No.2023YFB3210400);Major Scientific and Technological Innovation Project of Shandong Province(No.2021CXGC010603);Natural Science Foundation of Shandong Province(Nos.ZR2020QE057,ZR2020QE071,ZR2020LLZ006);Innovative Team Project of Jinan(No.2021GXRC019)。

摘　　要：Semiconductor-molecule surface-enhanced Raman scattering(SERS),especially the stronger interfacial charge transfer process(ICTP),represents a frontier in the field of SERS with spectral reproducibility and unparalleled selectivity.Herein,through a laser microfabrication method in situ,the free-standing,super hydrophilic and vacancy-rich TiO_(2-x)/Ti is successfully synthesized.Using blue TiO_(x)/Ti(B-TiO_(x)/Ti)as preconcentrated substrate,a nanomolar-level limit of detection of 12 nmol/L at 1385 cm–1,is confirmed using crystal violet(CV)bacteriostat as a model under 532 nm excitation.Furthermore,the results demonstrate that the SERS enhancement mechanism is via the moderate adulteration of oxygen vacancy,which leads to a narrow value of band gap and increases the ICTP of substrate to molecules.Using a hand-held extractor assembled with B-TiO_(x)/Ti microfiber,the operando analysis of mixtures distributed information excited in different parts of Asian carp is facilely achieved.This work guides the controlled synthesis of vacancy-rich TiO_(2-x)/Ti nanostructure and its application in ultrasensitive extraction-SERS detection.It also provides the direction for the rapid and operando transmission of biological information with temporal and spatial concentration distribution in human tissues by highly sensitized materials.

关 键 词：Defect engineering TiO_(2-x)/Ti microfiber Laser microfabrication Surface-enhanced Raman scattering Solid phase microextraction Operando sensing 

分 类 号：O657.37[理学—分析化学] TP212[理学—化学]