Britto Sheeba, Ramasamy Velavan, Murugesan Priya
Appl Opt. 2019 Apr 10;58(11):2898-2903. doi: 10.1364/AO.58.002898.
Graphene-tantalum oxide (TaO) hybrid material is synthesized using a simple hydrothermal method to elucidate its optical properties. The prepared sample is characterized by X-ray diffraction, scanning electron microscope (SEM), high-resolution-transmission electron microscope (HR-TEM), thermo-gravimetric and differential thermal analysis (TG-DTA), Fourier transform-Raman spectra, and photoluminescence (PL) studies. SEM and HR-TEM analysis revealed that the TaO particles are embedded on the surface of thin sheets of well-defined graphene structure. Thermogravimetric analysis has provided substantial evidence for the thermal stability of the material with minimal percentage of weight loss at 700°C. Further, the excitation of the nanocomposite at a wavelength of 280 nm leading to emission spectra at 567 nm using PL studies, which clearly indicates the emission of light, occurs in the visible green region.
采用简单的水热法合成了氧化钽-石墨烯（TaO）杂化材料，以阐明其光学性质。通过X射线衍射、扫描电子显微镜（SEM）、高分辨率透射电子显微镜（HR-TEM）、热重-差热分析（TG-DTA）、傅里叶变换拉曼光谱和光致发光（PL）研究对制备的样品进行了表征。SEM和HR-TEM分析表明，TaO颗粒嵌入在结构明确的石墨烯薄片表面。热重分析为该材料的热稳定性提供了充分证据，在700°C时重量损失百分比最小。此外，利用PL研究在280 nm波长激发纳米复合材料，导致在567 nm处出现发射光谱，这清楚地表明在可见绿色区域发生了光发射。
