This is the first report for the synthesis of L-cysteine mediated Cu₂WS₄ nanoparticles for different temperatures by an inexpensive and less pollutive hydrothermal method. The as-synthesized particles were characterized by XRD, FTIR, FESEM, UV–vis diffuse reflectance and PL spectra technique respectively. The phase purity and structural confirmation were studied by X-ray powder diffraction technique. It is observed that the synthesis temperature affecting the crystalline size. The optical analysis of the Cu₂WS₄ nanoparticles showed direct band gap in the range of 2.1–2.3 eV. The intensity of the PL emission spectra decreases with increase of reaction temperature. The antibacterial performance of Cu₂WS₄ nanoparticles were investigated by agar well diffusion method and the results confirm that the antibacterial activity of Cu₂WS₄ against Gram-positive (B. subtilis, M. luteus) and Gram-negative (E. coli, P. aeruginosa and K. pneumoniae) bacteria.

这是通过廉价且污染少的水热法合成不同温度下L-半胱氨酸介导的Cu ₂ WS ₄纳米粒子的第一份报告。分别通过XRD，FTIR，FESEM，UV-vis漫反射和PL光谱技术对合成后的颗粒进行了表征。通过X射线粉末衍射技术研究了相纯度和结构确认。观察到合成温度影响晶体尺寸。Cu ₂ WS ₄纳米粒子的光学分析显示直接带隙在2.1–2.3范围内 eV。PL发射光谱的强度随着反应温度的升高而降低。通过琼脂井扩散法研究了Cu ₂ WS ₄纳米颗粒的抗菌性能，结果证实了Cu ₂ WS ₄对革兰氏阳性（枯草芽孢杆菌，黄曲霉）和革兰氏阴性菌（大肠杆菌）的抗菌活性。 ，铜绿假单胞菌和肺炎克雷伯菌）。