研究目的
Investigating the synthesis of nanostructured metal sulfides (CdS, CuS, and SnS) using pulsed laser ablation in liquid environment and their antimicrobial activity.
研究成果
DMSO solution is successfully used as a source of sulfur to synthesize different metal sulfides (CuS, CdS, and SnS) with an average particle size between 20 and 50 nm by using one-pot pulsed laser ablation in liquid media (PLAL) technique. The antimicrobial behavior is studied against Bacillus subtilis, Staphylococcus aureus, Escherichia coli, Salmonella sp., and Candida albicans as a reference strains. Based on the MIC values, these nanoparticles have a potential antibacterial activity with different level based on their antimicrobial effects. CuS nanostructure sample has recorded the highest antimicrobial activity value. So, it is recommended as the broad spectrum antimicrobial agent.
研究不足
The study focuses on the synthesis and antimicrobial activity of nanostructured metal sulfides, but does not explore their potential toxicity or environmental impact.
1：Experimental Design and Method Selection
Nanostructured metal sulfides were synthesized by pulsed laser ablation of cleaned metal targets in a glass vessel filled with 5 mL of DMSO solution using an acoustic optically Q-switched Nd:YAG laser.
2：Sample Selection and Data Sources
Cadmium (Cd), Tin (Sn), and Copper (Cu) metal sheets were used as targets. DMSO was used as a sulfur source.
3：List of Experimental Equipment and Materials
Nd:YAG laser (λ = 1064 nm), Fourier-transform infrared spectroscopy (JASCO FT-IR 6100 spectrometer), UV–VIS-NIR spectrophotometer (JASCO 570 UV–VIS-NIR), high-resolution transmission electron microscope (JEOL-JEM-1011), X-ray diffractometer (Schimadzu XRD 7000), Energy dispersive X-ray spectroscopy (EDX) measurements using TEAM? software attached to the field emission scanning electron microscope (Quanta FEG 250).
4：Experimental Procedures and Operational Workflow
The laser beam was focused on the surface of the target by plan-convex lens with focal length = 70 mm for 10 min under mechanical stirring.
5：Data Analysis Methods
The optical properties were studied using UV–Visible spectroscopy. The morphology was analyzed by TEM. The crystalline structure was characterized using XRD. The chemical composition was investigated using EDX.
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