Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 12, Pages 14476-14483Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b18148
Keywords
vertically aligned MoS2 nanoflakes; oxygen plasma treatment; localized surface plasmon resonance (LSPR); near-infrared absorption; photodetector
Funding
- STEAM Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2017M3C1A9069590]
- Electronics and Telecommunications Research Institute (ETRI) grant - Korean government [19ZB1100]
- Institute for Information & Communication Technology Planning & Evaluation (IITP), Republic of Korea [19ZB1100] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2017M3C1A9069590] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
The development of MoS2 with two- or three-dimensional heterostructures can provide a significant breakthrough for the enhancement of photodetection abilities such as increase in light absorption and expanding the detection ranges. Till date, although the synthesis of a MoS2 layer with three-dimensional nanostructures using a chemical vapor deposition (CVD) process has been successfully demonstrated, most studies have concentrated on electrochemical applications that utilize structural strengths, for example, a large specific surface area and electrochemically active sites. Here, for the first time, we report spectral light absorption induced by plasmon resonances in single-layer MoS2 (SL-MoS2) with vertically aligned nanoflakes grown by a CVD process. Treatment with oxygen plasma results in the formation of a substoichiometric phase of MoOx in the vertical nanoflakes, which exhibit a high electron density of 4.5 x 10(13) cm(-1). The substoichiometric MoOx with a high electron-doping level that is locally present on the SL-MoS2 surface induces an absorption band in the near-infrared (NIR) wavelength range of 1000-1750 nm because of the plasmon resonances. Finally, we demonstrate the enhancement of photodetection ability by broadening the detection range from the visible region to the NIR region in oxygen-treated SL-MoS2 with vertically aligned nanoflakes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available