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Plasmon-exciton coupling of monolayer MoS2-Ag nanoparticles hybrids for surface catalytic reaction

Yang, Xianzhong; Yu, Hua; Guo, Xiao; Ding, Qianqian; Pullerits, Tonu LU ; Wang, Rongming; Zhang, Guangyu; Liang, Wenjie and Sun, Mengtao LU (2017) In Materials Today Energy 5. p.72-78
Abstract

The optical properties of monolayer molybdenum disulfide (MoS2)/Ag nanoparticle (NP) hybrids and their application to surface catalytic reactions were studied by transmission, photoluminescence (PL) and Raman spectroscopies. The local surface plasmon resonance (LSPR) of Ag nanoparticles was tuned to better match the exciton energy of monolayer MoS2. The PL of the hybrids was enhanced by more than 50 times when the local surface plasmon resonance (LSPR) peak was tuned systematically from 438 nm to 532 nm, indicating a stronger coupling and higher energy transfer rate between the plasmon of the Ag NPs and the excitons of the MoS2. Additionally, photocatalytic reactions of 4-nitrobenzenethiol (4NBT) were... (More)

The optical properties of monolayer molybdenum disulfide (MoS2)/Ag nanoparticle (NP) hybrids and their application to surface catalytic reactions were studied by transmission, photoluminescence (PL) and Raman spectroscopies. The local surface plasmon resonance (LSPR) of Ag nanoparticles was tuned to better match the exciton energy of monolayer MoS2. The PL of the hybrids was enhanced by more than 50 times when the local surface plasmon resonance (LSPR) peak was tuned systematically from 438 nm to 532 nm, indicating a stronger coupling and higher energy transfer rate between the plasmon of the Ag NPs and the excitons of the MoS2. Additionally, photocatalytic reactions of 4-nitrobenzenethiol (4NBT) were performed on the MoS2, the Ag nanoparticles, and the hybrid MoS2 with Ag nanoparticles. On the MoS2 substrate alone, there is no photocatalytic reaction. With a low laser intensity, the probability of a chemical reaction occurring for molecules directly adsorbed onto the Ag NPs is much lower than the probability of a reaction involving those molecules adsorbed onto the MoS2/Ag substrate. At a higher power, although the electric field was reduced by approximately 30% by the MoS2 layer, there is better efficiency for the plasmon-exciton co-driven surface catalytic reactions on the MoS2/Ag substrate compared to the Ag substrate alone. Our findings illustrate the potential to control hot carriers for better surface catalytic reactions by tuning the exciton-plasmon coupling between the 2D transition metal dichalcogenides (TMDCs) and Ag NPs.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Ag nanoparticles, Monolayer MoS, Photocatalysis, Plasmon-exciton coupling
in
Materials Today Energy
volume
5
pages
7 pages
external identifiers
  • scopus:85019367733
DOI
10.1016/j.mtener.2017.05.005
language
English
LU publication?
yes
id
5defda69-dc9e-49fc-8c2b-e9e2de3f9027
date added to LUP
2018-01-18 09:16:00
date last changed
2018-05-27 04:49:01
@article{5defda69-dc9e-49fc-8c2b-e9e2de3f9027,
  abstract     = {<p>The optical properties of monolayer molybdenum disulfide (MoS<sub>2</sub>)/Ag nanoparticle (NP) hybrids and their application to surface catalytic reactions were studied by transmission, photoluminescence (PL) and Raman spectroscopies. The local surface plasmon resonance (LSPR) of Ag nanoparticles was tuned to better match the exciton energy of monolayer MoS<sub>2</sub>. The PL of the hybrids was enhanced by more than 50 times when the local surface plasmon resonance (LSPR) peak was tuned systematically from 438 nm to 532 nm, indicating a stronger coupling and higher energy transfer rate between the plasmon of the Ag NPs and the excitons of the MoS<sub>2</sub>. Additionally, photocatalytic reactions of 4-nitrobenzenethiol (4NBT) were performed on the MoS<sub>2</sub>, the Ag nanoparticles, and the hybrid MoS<sub>2</sub> with Ag nanoparticles. On the MoS<sub>2</sub> substrate alone, there is no photocatalytic reaction. With a low laser intensity, the probability of a chemical reaction occurring for molecules directly adsorbed onto the Ag NPs is much lower than the probability of a reaction involving those molecules adsorbed onto the MoS<sub>2</sub>/Ag substrate. At a higher power, although the electric field was reduced by approximately 30% by the MoS<sub>2</sub> layer, there is better efficiency for the plasmon-exciton co-driven surface catalytic reactions on the MoS<sub>2</sub>/Ag substrate compared to the Ag substrate alone. Our findings illustrate the potential to control hot carriers for better surface catalytic reactions by tuning the exciton-plasmon coupling between the 2D transition metal dichalcogenides (TMDCs) and Ag NPs.</p>},
  author       = {Yang, Xianzhong and Yu, Hua and Guo, Xiao and Ding, Qianqian and Pullerits, Tonu and Wang, Rongming and Zhang, Guangyu and Liang, Wenjie and Sun, Mengtao},
  keyword      = {Ag nanoparticles,Monolayer MoS,Photocatalysis,Plasmon-exciton coupling},
  language     = {eng},
  month        = {09},
  pages        = {72--78},
  series       = {Materials Today Energy},
  title        = {Plasmon-exciton coupling of monolayer MoS<sub>2</sub>-Ag nanoparticles hybrids for surface catalytic reaction},
  url          = {http://dx.doi.org/10.1016/j.mtener.2017.05.005},
  volume       = {5},
  year         = {2017},
}