研究目的
Investigating the right oxidation temperature to synthesize tin oxide nanowires and improving the structural and optical properties of the synthesized tin oxide thin film by oxidation temperature.
研究成果
Tin oxide nanowires were successfully synthesized on Silicon substrate by using thermal oxidation method at oxidation temperature 500 oC with diameter in nanometers. The energy band gap Eg of SnO2 was found to be 1.21 eV at optimized oxidation temperature of 500 oC. The PL emission spectra of SnO2 nanowires exhibit peaks at 450 nm, 500 nm, and 650 nm excitations. The most suitable oxidation temperature for preparation of SnO2 nanowire is 500 oC, and the thermal oxidation is a very efficient and simple process for the preparation of homogenous SnO2 nanoparticles.
研究不足
The study is limited to the synthesis and characterization of tin oxide nanostructures at specific oxidation temperatures (450 oC, 500 oC, and 550 oC). The effects of other parameters such as deposition rate, oxygen partial pressure, and annealing temperature were not investigated.
1：Experimental Design and Method Selection:
Tin oxide (SnO2) nanocrystals and nanowires were synthesized on Si (100) substrate by thermal oxidation method at different oxidation temperatures (450 oC, 500 oC, and 550 oC). The synthesized nanostructures were characterized by FESEM, Uv-Vis, and Photoluminescence spectrum.
2：Sample Selection and Data Sources:
Silicon (Si) wafer p-type (100) was used as a substrate. Tin powder (Sn) was deposited on the Si substrates in a thermal evaporator.
3：List of Experimental Equipment and Materials:
Field Emission Scanning Electron Microscope (FESEM) JEOL, JSM-7800F, UV-Vis-NIR spectrometer, Photoluminescence (PL) emission spectra, thermal evaporator, tube furnace.
4：Experimental Procedures and Operational Workflow:
The Si substrate was cleaned using Piranha solution, tin powder was deposited on the Si substrates in a thermal evaporator, and thermal oxidation was carried out using a tube furnace at different oxidation temperatures.
5：Data Analysis Methods:
The morphology of the samples was confirmed by FESEM, and the optical properties were obtained from Uv-Vis and photoluminescence (PL) spectrum.
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