Abstract
In the present investigation, the cadmium sulphide (CdS) nanoparticles are synthesized in the normal gravity i.e. 1 g (called as control) and in simulated microgravity (called as SMG). The SMG was created by using an instrument called Random Positioning Machine (RPM). Cadmium sulfide nanoparticles were synthesized by using standard chemical method under normal gravity (1 g) and simulated microgravity conditions. The synthesized CdS nanoparticles were characterized by Ultraviolet Visible spectroscopy, Fourier Transform Infrared Ray spectroscopy (FTIR), X-ray diffraction (XRD). The UV-visible absorption spectrum of CdS nanoparticle solution showed a distinct absorption peak at 472.19 nm in control and 458.26 nm in SMG. The band gap calculated from the absorption edge for microgravity sample was 2.71 eV and for control sample was 2.63 eV. The crystalline size of CdS nanoparticles synthesised in control and Micro-g was determined by XRD. Obtained results showed smaller the particle size in microgravity sample (10.78 nm) as compared to control sample (13.89 nm).
Highlights
The fabrication of nanoparticles with desired sizes and shapes has propelled nanotechnology into most promising and popular fields of scientific research
The cadmium sulphide (CdS) nanoparticles were synthesized by using standard chemical method under normal (1 g) and simulated microgravity conditions and the effects were observed on band gap and particle size of synthesized CdS nanoparticles with the help of spectroscopic techniques
For synthesis the CdS nanoparticles in simulated microgravity (SMG) the same procedure was repeated with all mixture placed in Random Positioning Machine (RPM) machine for 1 hour as shown in figure 1b
Summary
The fabrication of nanoparticles with desired sizes and shapes has propelled nanotechnology into most promising and popular fields of scientific research. The CdS nanoparticles were synthesized by using standard chemical method under normal (1 g) and simulated microgravity conditions and the effects were observed on band gap and particle size of synthesized CdS nanoparticles with the help of spectroscopic techniques. For synthesis the CdS nanoparticles in simulated microgravity (SMG) the same procedure was repeated with all mixture placed in RPM machine for 1 hour as shown in figure 1b. Both the solutions were kept for overnight at room temperature and centrifuged at 10000 rpm for 10 minutes. The band gap of control and microgravity samples were 2.76 eV and 2.80 eV respectively
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