The aim of this work was to prepare and characterize color-tunable luminescent nanocomposite fibers composed of CdTe quantum dots (CdTe-QDs) and polylactic acid (PLA) via nanoprecipitation. This method provides a simple procedure to incorporate QDs with various emission wavelengths onto nanofibers’ surfaces. A one-pot microwave irradiation method was employed to prepare green- to red-emitting 3-mercaptopropionic acid (MPA)-capped CdTe-QDs with high luminescence. Microfiber PLA membranes were produced via forcespinning. These nanofibers can integrate the luminescent properties of CdTe-QDs and extend their advantages to fiber-based structures. Ultraviolet-visible spectroscopy (UV–vis) and transmission electron microscopy (TEM) were used to characterize the CdTe-QDs. TEM images revealed that the CdTe-QDs were 4 nm in size. The CdTe-QDs’ effect on the microfibers were characterized morphologically via scanning electron microscopy (SEM), which showed that the average diameter of the CdTe-QDs/PLA nanofibers was 3.5 μm. They were optically analyzed by photoluminescence (PL), absorption spectroscopy, Fourier-transform infrared spectroscopy (FTIR), and confocal fluorescence microscopy. FTIR revealed strong interactions between the MAP stabilizing agents and PLA fibers. These preliminary results demonstrate that these microfibers have potential for biological labeling and diagnostics based on their properties.
In this work cadmium telluride quantum dots (CdTeQDs) were prepared via one-pot synthesis microwave assisted. Afterwards, CdTeQDs/silica (SiO2)/nigrosine (nigro)/poly (styrene co-methyl methacrylate) (PSCMM) fluorescent nanocomposite (CSNP) powders were prepared via ultrasonic treatment and post drying at 60 ℃. The samples were characterized by UV-vis absorbance, X-Ray diffraction (XRD) and transmission electron microscopy (TEM). Finally, successful printing tests were performed on security paper at 130 ℃. These results show the potential of this
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