PMID- 36258361
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20221019
IS  - 1094-4087 (Electronic)
IS  - 1094-4087 (Linking)
VI  - 30
IP  - 21
DP  - 2022 Oct 10
TI  - SERS enhancement induced by the Se vacancy defects in ultra-thin hybrid phase 
      SnSe(x) nanosheets.
PG  - 37795-37814
LID - 10.1364/OE.473965 [doi]
AB  - Improving the photo-induced charge transfer (PICT) efficiency by adjusting the 
      energy levels difference between adsorbed probe molecules and substrate materials 
      is a key factor for boosting the surface enhanced Raman scattering (SERS) based 
      on the chemical mechanism (CM). Herein, a new route to improve the SERS activity 
      of two-dimensional (2D) selenium and tin compounds (SnSe(x), 1 </= x </= 2) by the 
      hybrid phase materials is researched. The physical properties and the energy band 
      structure of SnSe(x) were analyzed. The enhanced SERS activity of 2D SnSe(x) can 
      be attribute to the coupling of the PICT resonance caused by the defect energy 
      levels induced by Se vacancy and the molecular resonance Raman scattering (RRS). 
      This established a relationship between the physical properties and SERS activity 
      of 2D layered materials. The resonance probe molecule, rhodamine (R6G), which is 
      used to detect the SERS performance of SnSe(x) nanosheets. The enhancement factor 
      (EF) of R6G on the optimized SnSe(1.35) nanosheets can be as high as 2.6 x 10(6), 
      with a detection limit of 10(-10) M. The SERS result of the environmental 
      pollution, thiram, shows that the SnSe(x) nanosheets have a practical application 
      in trace SERS detection, without the participation of metal particles. These 
      results demonstrate that, through hybrid phase materials, the SERS sensitivity of 
      2D layered nanomaterials can be improved. It provides a kind of foreground 
      non-metal SERS substrate in monitoring or detecting and provide a deep insight 
      into the chemical SERS mechanism based on 2D layered materials.
FAU - Chen, Chuansong
AU  - Chen C
FAU - Zhang, Wenjie
AU  - Zhang W
FAU - Duan, Pengyi
AU  - Duan P
FAU - Liu, Wenying
AU  - Liu W
FAU - Shafi, Muhammad
AU  - Shafi M
FAU - Hu, Xiaoxuan
AU  - Hu X
FAU - Zhang, Can
AU  - Zhang C
FAU - Zhang, Chao
AU  - Zhang C
FAU - Man, Baoyuan
AU  - Man B
FAU - Liu, Mei
AU  - Liu M
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Opt Express
JT  - Optics express
JID - 101137103
SB  - IM
EDAT- 2022/10/20 06:00
MHDA- 2022/10/20 06:01
CRDT- 2022/10/19 01:03
PHST- 2022/10/19 01:03 [entrez]
PHST- 2022/10/20 06:00 [pubmed]
PHST- 2022/10/20 06:01 [medline]
AID - 507402 [pii]
AID - 10.1364/OE.473965 [doi]
PST - ppublish
SO  - Opt Express. 2022 Oct 10;30(21):37795-37814. doi: 10.1364/OE.473965.