Formation and Photoluminescence Properties of ZnO Nanoparticles on Electrospun Nanofibers Produced by Atomic Layer Deposition

Abstract

The unique combination of optical, chemical, and structural properties of one-dimensional zinc oxide (1D ZnO) makes it one of the most attractive materials in a wide range of research and applications. In the present study, 1D ZnO nanomaterials were fabricated using a combination of two independent methods: electrospinning and atomic layer deposition (ALD). The electrospinning technique was used to produce 1D electrospun fibers consisting of four types of polymers: polylactic acid (PLLA), polyvinylidene fluoride (PVDF), polyvinyl alcohol (PVA), and polyamide 6 (PA6). The ALD technology, in turn, was selected as an excellent candidate for the synthesis of a ZnO thin layer over polymer fibers for the production of 1D ZnO/polymer nanofiber composites (PLLA/ZnO, PVDF/ZnO, PVA/ZnO, PA6/ZnO). Structural and optical properties of the produced nanofibers were studied by means of scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), diffuse reflectance, and photoluminescence (PL) spectroscopy. It was found that only PVDF/ZnO nanofibers exhibit stable room temperature PL that may be the result of a higher ZnO content in the sample. In addition, PL measurements were conducted as a function of excitation power and temperature in order to establish the main PL mechanisms and parameters for the PVDF/ZnO sample, as a most promising candidate for the biophotonic application.

Morphology, defects and polymer concentration related nonlinear absorption and optical limiting properties of electrospun polyamide 6 nanofibers

“…The energy band gap values of the PA 6 nanofibers were determined in the range of 2.53 and 2.75 eV. The energy band gap values of the PA 6 nanofibers were determined in the range of 2.53 and 2.75 eV, which are lower compared to 4.18 eV reported in [55] The fluctuations in the energy band gap were observed with increasing PA 6 concentration.…”

Fabrication and Properties of Electrospun and Electrosprayed Polyethylene Glycol/Polylactic Acid (PEG/PLA) Films

“…The microstructure of the as-prepared PEG/PLA films shown in Figure 1 significantly changed due to varying the precursor electrospinning solution. PLA25 and PLA35 PEG/PLA films exhibited typical morphologies for the electrospinning method [23][24][25][26][27][28][29][30][31][32][33][34][35], while the PLA45 PEG/PLA film showed the characteristic electrosprayed microstructure [33][34][35]. For the PLA25 film derived from solution PLA25 with the lowest PLA content of 25 wt.%, the outerdiameter (O.D.)…”

“…The objective of this work is to prepare novel films with high cooling performance, good wetting and adsorption properties, as well as considerable mechanical properties for HNB tobacco application. The electrospinning technique has been considered as one of the most efficient ways to fabricate continuous fibers in the submicron to nanometer scale range, and the microstructure of the fibers is highly dependent on electrospinning parameters such as precursor electrospinning solution, operating voltage and the distance from the collector to the needle [23][24][25][26][27][28][29][30][31][32][33][34][35]. Therefore, in the present work, three typical electrospun/electrosprayed PEG/PLA films with different morphologies were prepared by using the simple electrospinning or electrospray method and adjusting the PLA content and precursor electrospinning solution.…”

MXene nanoflakes decorating ZnO tetrapods for enhanced performance of skin-attachable stretchable enzymatic electrochemical glucose sensor

“…Among all known semiconductors, the nanoscale zinc oxide (ZnO) is considered to be one of the most suitable for biomedical applications. A variety of morphologies, the enhanced surface to volume ratio, high isoelectric point (IEP ~ 9.5), high electron transport capacity, and biocompatibility are just a few of its many superior physical-chemical properties (Myndrul et al, 2020;Pavlenko et al, 2020;Tereshchenko et al, 2016). Today, ZnO still meets scientists' expectations and is increasingly used in a variety of detection techniques, such as optical (Myndrul et al, 2021), electronic (Wang et al, 2019), SPR (Kuranaga et al, 2020), SERS (Y. , and piezoelectric (bio)sensors (Zhao et al, 2015).…”