Thin film is a subject of great interest for energy and environmental applications. Graphene oxide (GO) in this regard can play a vital role in thin film technology because of its extraordinary optoelectronics and environmentally friendly characteristics. Despite the fast development in the GO based material, there are very few reports on optoelectronics and antibacterial activity of GO thin films. Herein, GO thin films of different concentrations have been deposited on glass substrate by spin coating technique. The optical and dielectric properties of GO thin films were determined by the UV–visible technique. Crystalline nature, grain sizes, dislocation density, and lattice strain were examined through X-ray diffraction. The possible change in the π-π* and n-π* electronic transition and the band gap evaluations of GO thin films were also calculated. Raman spectroscopy was applied to check the quality and defects linked to sp² breathing modes of GO thin films. Surface chemical state and ratio of CC, CO, OCOH, OC, and (O)O were investigated through X-rays photoelectron spectroscopy. GO thin films were also subjected for antibacterial activity tests towards Bacillus cereus and Serratia marcescens and significantly inhibition of bacterial growth in both solid and liquid media was observed. The results emphasise the potential uses of GO thin films in optoelectronics, environmental, and medical device coating for protection against various infectious agents.

对于能源和环境应用来说，薄膜是一个备受关注的主题。在这方面，氧化石墨烯（GO）在薄膜技术中起着至关重要的作用，因为它具有非凡的光电性能和环保特性。尽管基于GO的材料发展迅速，但是关于GO薄膜的光电子学和抗菌活性的报道很少。在此，已经通过旋涂技术将不同浓度的GO薄膜沉积在玻璃基板上。GO薄膜的光学和介电特性是通过UV-可见技术确定的。通过X射线衍射检查晶体性质，晶粒尺寸，位错密度和晶格应变。还计算了π-π*和n-π*电子跃迁的可能变化以及GO薄膜的带隙评估。拉曼光谱法用于检查与sp有关的质量和缺陷^2种呼吸GO薄膜模式。通过X射线光电子能谱研究了C C，C O，O C OH，O C和（O）O的表面化学状态和比例。还对GO薄膜进行了针对蜡状芽孢杆菌和粘质沙雷氏菌的抗菌活性测试，并观察到了在固体和液体培养基中细菌生长的显着抑制。结果强调了GO薄膜在光电子，环境和医疗设备涂层中的潜在用途，以防止各种传染原。