研究目的
Investigating the synthesis of Zn1 – xCdxS nanoparticles by laser ablation in different solvents and their characterization.
研究成果
Approximately spherical Zn1 – xCdxS nanoparticles can be produced by laser ablation in solution, with sizes around 7 ± 3 nm. The size distribution can be shifted by prolonged laser irradiation. The absorption behavior is not strongly dependent on the presence of oxygen during ablation. Acetonitrile is the most effective solvent for stabilizing the nanoparticles.
研究不足
The procedure is not strongly size-selective, leading to a wide distribution of particle sizes. Prolonged irradiation can lead to particle agglomeration. The ablation efficiency is lower in degassed solvents.
1：Experimental Design and Method Selection:
Laser ablation of bulk Zn1 – xCdxS in various solvents using a Nd:YAG laser.
2：Sample Selection and Data Sources:
Bulk semiconductor material and solvents like acetonitrile, butan-2-ol, ethanol, methanol, triethylenglycol, and water.
3：List of Experimental Equipment and Materials:
Nd:YAG laser (Laser Design, Germany), Lambda7 double beam spectrometer, Joel 2000 FX TEM microscope.
4：Experimental Procedures and Operational Workflow:
Laser pulses focused onto bulk semiconductor in a quartz cell with solvent, absorption spectra taken, TEM samples prepared by drying suspensions on copper mesh.
5：Data Analysis Methods:
Absorption spectra analysis, TEM image analysis for particle size distribution.
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