Kumar Santosh, Wani Mohmmad Y, Arranja Claudia T, Castro Ricardo A E, Paixão José A, Sobral Abilio J F N
Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal.
Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal.
Spectrochim Acta A Mol Biomol Spectrosc. 2018 Jan 5;188:183-188. doi: 10.1016/j.saa.2017.06.045. Epub 2017 Jul 1.
Fluorescent materials are important for low-cost opto-electronic and biomedical sensor devices. In this study we present the synthesis and characterization of graphene modified with bis-thiosemicarbazone (BTS). This new material was characterized using Fourier transform infrared spectroscopy (FT-IR), Ultraviolet-visible (UV-Vis) and Raman spectroscopy techniques. Further evaluation by X-ray diffraction (XRD), thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and atomic-force microscopy (AFM) allowed us to fully characterize the morphology of the fabricated material. The average height of the BTSGO sheet is around 10nm. Optical properties of BTSGO evaluated by photoluminescence (PL) spectroscopy showed red shift at different excitation wavelength compared to graphene oxide or bisthiosemicarbazide alone. These results strongly suggest that BTSGO material could find potential applications in graphene based optoelectronic devices.
荧光材料对于低成本光电器件和生物医学传感器设备至关重要。在本研究中，我们展示了用双硫代半卡巴腙（BTS）修饰的石墨烯的合成与表征。使用傅里叶变换红外光谱（FT-IR）、紫外可见（UV-Vis）和拉曼光谱技术对这种新材料进行了表征。通过X射线衍射（XRD）、热重分析（TGA）、差示扫描量热法（DSC）、扫描电子显微镜（SEM）和原子力显微镜（AFM）进一步评估，使我们能够全面表征所制备材料的形态。BTSGO片层的平均高度约为10nm。通过光致发光（PL）光谱评估的BTSGO的光学性质表明，与单独的氧化石墨烯或双硫代半卡巴腙相比，在不同激发波长下出现红移。这些结果有力地表明，BTSGO材料在基于石墨烯的光电器件中可能具有潜在应用。
