Hydrothermal synthesis of MoS2 nanosheets for multiple wavelength optical sensing applications
| Autor: | S. S. Islam, Manika Khanuja, Abid, Nahid Chaudhary |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Absorption spectroscopy Scanning electron microscope 02 engineering and technology 010402 general chemistry 01 natural sciences Hydrothermal circulation law.invention symbols.namesake law Hydrothermal synthesis Electrical and Electronic Engineering Spectroscopy Instrumentation business.industry Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Laser 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Transmission electron microscopy symbols Optoelectronics 0210 nano-technology business Raman spectroscopy |
| Zdroj: | Sensors and Actuators A: Physical. 277:190-198 |
| ISSN: | 0924-4247 |
| Popis: | In the present work, MoS2 nanosheets were synthesized by a hydrothermal method for optical sensing application. X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Raman and UV–vis spectroscopy were carried out to characterize the synthesized MoS2 nanosheets. SEM and TEM images showed the morphology of ultrathin nanosheets of MoS2. Optical sensor of MoS2 nanosheets was fabricated and thoroughly studied using various laser excitation wavelengths (λex): 440 nm (indigo); 460 nm (blue); 550 nm (green); 570 nm (yellow); 635 nm (red) and 785 nm (infra-red). The excellent photoresponsivity was observed in the visible range and maximum was found to be 23.8 μA/W for λex: 635 nm (red illumination). The mechanism for photoresponse was proposed and correlated with the absorption spectroscopy. The response and recovery times for 635 nm were 2.5 and 3.2 s, respectively. The photoresponsive characteristics of MoS2 nanosheets were also explored as a function of optical power density. |
| Databáze: | OpenAIRE |
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