PMID- 38009267
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231218
IS  - 1364-5528 (Electronic)
IS  - 0003-2654 (Linking)
VI  - 149
IP  - 1
DP  - 2023 Dec 18
TI  - Enhancing charge transfer in a W(18)O(49)/g-C(3)N(4) heterostructure via band 
      structure engineering for effective SERS detection and flexible substrate 
      applications.
PG  - 180-187
LID - 10.1039/d3an01690k [doi]
AB  - Chemical mechanism (CM)-related surface-enhanced Raman spectroscopy (SERS) has 
      received tremendous interest due to its exceptional stability and excellent 
      uniformity. Nevertheless, there remains a demand for ingenious methodologies for 
      promoting effective charge transfer (CT) to improve SERS sensitivity further. 
      Herein, a band structure engineered W(18)O(49)/g-C(3)N(4) heterostructure (WCN) 
      was first employed as a CM-based SERS substrate with remarkable enhancement and 
      sensitivity. To investigate the Raman enhancement properties of the substrate, 
      malachite green (MG) was employed as the Raman probe with the excitation of a 633 
      nm laser. The WCN substrate exhibits a Raman enhancement factor (EF) of 2.6 x 
      10(7), achieving a limit of detection (LOD) of 1.9 x 10(-10) M for MG. The 
      outstanding Raman amplification behavior can be attributed to the 
      heterojunction-induced efficient CT process, energy band matching resonance due 
      to minor doping with g-C(3)N(4) serving as a band gap modifier, and improved 
      photo-induced charge transfer (PICT) efficiency via the oxygen vacancies in the 
      W(18)O(49) units. Additionally, a flexible SERS substrate based on WCN was 
      constructed using a vacuum filtration method and utilized to detect prohibited 
      pharmaceutical residues on fish skin. The integration of this WCN and a nylon 
      membrane not only preserves the Raman activity of the WCN for sensitive detection 
      but also endows the Raman substrate with high flexibility and good mechanical 
      durability, making it a potential candidate for in situ detection in particular 
      environments.
FAU - Tan, Lu
AU  - Tan L
AUID- ORCID: 0000-0001-7916-2384
AD  - School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 
      Jiangsu 211189, China. lou@seu.edu.cn.
AD  - State Key Laboratory of Analytical Chemistry for Life Science, School of 
      Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, 
      China. jjzhu@nju.edu.cn.
FAU - Yue, Shuzhen
AU  - Yue S
AD  - State Key Laboratory of Analytical Chemistry for Life Science, School of 
      Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, 
      China. jjzhu@nju.edu.cn.
FAU - Lou, Yongbing
AU  - Lou Y
AUID- ORCID: 0000-0002-8224-5057
AD  - School of Chemistry and Chemical Engineering, Southeast University, Nanjing, 
      Jiangsu 211189, China. lou@seu.edu.cn.
FAU - Zhu, Jun-Jie
AU  - Zhu JJ
AUID- ORCID: 0000-0002-8201-1285
AD  - State Key Laboratory of Analytical Chemistry for Life Science, School of 
      Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210023, 
      China. jjzhu@nju.edu.cn.
AD  - Shenzhen Research Institute of Nanjing University, Shenzhen 518000, China.
LA  - eng
PT  - Journal Article
DEP - 20231218
PL  - England
TA  - Analyst
JT  - The Analyst
JID - 0372652
SB  - IM
EDAT- 2023/11/27 06:47
MHDA- 2023/11/27 06:48
CRDT- 2023/11/27 04:33
PHST- 2023/11/27 06:48 [medline]
PHST- 2023/11/27 06:47 [pubmed]
PHST- 2023/11/27 04:33 [entrez]
AID - 10.1039/d3an01690k [doi]
PST - epublish
SO  - Analyst. 2023 Dec 18;149(1):180-187. doi: 10.1039/d3an01690k.