Abstract:
In this study, a precipitation method was used to synthesise ZnO nanoparticles using suitable
precursors. An efficient surface modification method was proposed in order to reduce the
agglomeration among synthesised small sized ZnO nanoparticles using 2-aminothiophenol as a
capping agent. This article briefly investigated the effects of capping agent like 2-aminothiophenol on the optoelectronic properties of ZnO nanoparticles. The modified effectivity of
2-aminothiophenol has been examined on the nanosized ZnO nanoparticle for fluorescence
and UV–visible (UV–vis) studies. The mechanism was studied for ZnO nanoparticles light
emitting capability under different conditions. By facilitating the capping of ZnO with
2-aminothiophenol, fluorescence emission of the surface defects vanishes and ultraviolet (UV)
emission increases. Surface capping by 2-aminothiophenol effectively covers most of the surface
defects of ZnO and results in quenching of the visible region. The UV–vis absorption spectra of
modified ZnO nanoparticles has been influenced by modified ZnO nanoparticles as a result of
surface modification; where marked blue shift in absorption edge results. By surface modification
of ZnO nanoparticles, change in optoelectronics properties has opened the new scope and
possibilities to explore and fine tune the optical character of the modified ZnO for various
optoelectronics applications such as UV laser.
