An investigation on the structural, morphological, optical, and antibacterial activity of Sr:CuS nanostructures

• Published in: Scientific reports Vol. 14; no. 1; pp. 25169 - 17
• Main Authors: Al-Hammadi, A. H., Al-Adhreai, Asma’a Ahmed, Abdulwahab, A. M., Al-Adhreai, Arwa, Salem, Aeshah, Alaizeri, ZabnAllah M., ALSaeedy, Mohammed, Katib Alanazi, Faisal
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 24.10.2024; Nature Publishing Group; Nature Portfolio
• Subjects: 639/166; 639/624; 639/925; Anti-Bacterial Agents - chemistry; Anti-Bacterial Agents - pharmacology; Antibacterial activity; Antibiotics; Bacteria - drug effects; Chemical co-precipitation; Copper - chemistry; Copper - pharmacology; Crystals; E coli; Escherichia coli - drug effects; Humanities and Social Sciences; Klebsiella pneumoniae - drug effects; Microbial Sensitivity Tests; Morphology; multidisciplinary; Nanoparticles; Nanostructures - chemistry; Optical properties; Particle Size; Photoluminescence; Photons; Pseudomonas aeruginosa - drug effects; Science; Science (multidisciplinary); Sr doped CuS; Staphylococcus aureus - drug effects; Strontium; Strontium - chemistry; Strontium - pharmacology; X-Ray Diffraction; Antibacterial activity; Chemical co-precipitation; Sr doped CuS; Photoluminescence
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-024-73701-4

The aim of the present study is to synthesize Cu 1−x Sr x S (x = 0.00, 0.025, 0.05, 0.075, and 0.1) nanoparticles (NPs) using an easy chemical co-precipitation method in an efficient, inexpensive, and simple technique. The structural, morphological, and optical properties of the prepared samples were investigated using XRD, TEM, XRF, UV–Vis DRS, and PL characterization techniques. XRD spectra confirmed the Sr-doped copper sulfide nanoparticles have a hexagonal structure with crystallite sizes ranging from 15.15 to 16.04 nm, and, by XRF, the presence of the dopant was detected. TEM analysis confirmed that strontium ions had an effect on the shape of the CuS nanostructure, and the particle size increased from 16.27 to 17.32 nm after doping. A study using UV-Vis showed the presence of Sr doping increased the optical energy band gap (1.38 eV to 1.59 eV). At room temperature, one photoluminescence (PL) band was found at 826 nm. The antibacterial activity of CuS nanostructures against E. coli , P. aeruginosa , Klebsiella pneumonia , and S. aureus was evaluated by zone of inhibition. Sr doped CuS NPs exhibited the highest antibacterial activity against S. aureus (17 to 29 mm). Also, the results demonstrated that samples doped with 5, 7.5, and 10% Sr exhibited inhibitory effects against all the tested microbial strains higher than the antibiotic.