Functionalized Carbon-based Quantum Dots: Optical Characterization and Potential Application as Bio-fluorophore

2019 International Conference on Smart Materials Applications

Cruz, R.A.T.^1^2 ; Soriano, A.N.^2 ; De Yro, P.A.N.^1^2 ; Quiachon, G.M.O.^1 ; Emolaga, C.S.^1 ; Ysulat, M.L.M.^1 ; Bigol, U.G.^1 ; Basilia, B.A.^1^2

Industrial Technology Development Institute, Department of Science and Technology, General Santos Avenue, Bicutan,Taguig

1631, Philippines^1

School of Chemistry and Chemical Engineering, Mapua University, Intramuros, Manila

1002, Philippines^2

关键词: Attachment mechanism;    Carbon quantum dots;    Development and applications;    Emission wavelength;    Fourier transform infrared spectrometer;    Optical characterization;    Spectrofluorometers;    UV-Vis spectrophotometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/559/1/012003/pdf
DOI  :  10.1088/1757-899X/559/1/012003

来源: IOP

【 摘 要 】

Carbon quantum dots (CQDs), in comparison to heavy metal-based quantum dots offer renewable, non-toxic, low cost and easy synthesis production route while having excellent physicochemical properties for biomedical or environmental use. This paper discusses development and application of functionalized carbon quantum dots from glycerol as primary carbon source and tetraethylene pentamine as functionalizing agent. As-synthesized CQDs were characterized by Fourier Transform Infrared Spectrometer (FTIR), UV-Vis Spectrophotometer and Spectrofluorometer. FTIR spectra confirmed functionalization of resulting CQDs with emission wavelength peaks at 314.18 nm and 381.15 nm and observed strong blue luminescence under UV lamp. The performance of produced CQDs as biofluorophore for Gram-stained bacterial models was validated. Results indicated that CQDs can effect fluoresced images but a more distinct image can be observed on S. aureus compared to E. coli. An attachment mechanism of carbon quantum dots to the bacteria surfaces was also proposed here.