@article{2025, abstract = { As the electron transport layer of dye-sensitized solar cells (DSSCs), the photoanode is an important component that affects photoelectric conversion efficiency (PCE). The commonly used material titanium dioxide (TiO2) is difficult to prepare as nanostructures with large specific surface area, which affects dye loading and electrolyte diffusion. Herein, TiO2 nanofibers and ZnO-TiO2 composite nanofibers with different molar ratios are synthesized by electrospinning technology. The above nanofibers are coated on photoanodes by the doctor blade method to assemble DSSCs. The influence of the composite ratio of ZnO-TiO2 composite nanofibers on the photoelectric performance of the assembled DSSCs is explored. The ZnO-TiO2 composite nanofibers with a molar ratio of 1 : 2 have large specific surface area and porosity and have the smallest charge transfer resistance at the photoanode-electrolyte interface. The PCE of the nanofiber-modified DSSCs reaches a maximum of 3.66%, which is 56% higher than that of the TiO2 nanofiber-modified DSSCs. The photovoltaic parameters such as open circuit voltage (VOC), current density (JSC), and fill factor (FF) are 0.58 V, 10.36 mA/cm2, and 0.61, respectively. Proper compounding of zinc oxide (ZnO) can not only make the nanofibers absorb more dyes and enhance the light-harvesting ability but also improve the diffusion of the electrolyte and enhance the electron transport, thus successfully improving the power conversion efficiency of DSSCs. }, author = {Chang, Qiqi and Xu, Jun and Han, Yijun and Ehrmann, Andrea and He, Tianhong and Zheng, Ruiping}, issn = {1687-4129}, journal = {Journal of Nanomaterials}, publisher = {Hindawi Limited}, title = {{Photoelectric Performance Optimization of Dye-Sensitized Solar Cells Based on ZnO-TiO2 Composite Nanofibers}}, doi = {10.1155/2022/7356943}, volume = {2022}, year = {2022}, } @article{1072, abstract = { Due to their electrical and mechanical properties, carbon nanofibers are of large interest for diverse applications, from batteries to solar cells to filters. They can be produced by electrospinning polyacrylonitrile (PAN), stabilizing the gained nanofiber mats, and afterwards, carbonizing them in inert gas. The electrospun base material and the stabilization process are crucial for the results of the carbonization process, defining the whole fiber morphology. While blending PAN with gelatin to gain highly porous nanofibers has been reported a few times in the literature, no attempts have been made yet to stabilize and carbonize these fibers. This paper reports on the first tests of stabilizing PAN/gelatin nanofibers, depicting the impact of different stabilization temperatures and heating rates on the chemical properties as well as the morphologies of the resulting nanofiber mats. Similar to stabilization of pure PAN, a stabilization temperature of 280°C seems suitable, while the heating rate does not significantly influence the chemical properties. Compared to stabilization of pure PAN nanofiber mats, approximately doubled heating rates can be used for PAN/gelatin blends without creating undesired conglutinations, making this base material more suitable for industrial processes. }, author = {Sabantina, Lilia and Wehlage, Daria and Klöcker, Michaela and Mamun, Al and Grothe, Timo and García-Mateos, Francisco José and Rodríguez-Mirasol, José and Cordero, Tomás and Finsterbusch, Karin and Ehrmann, Andrea}, issn = {1687-4129}, journal = {Journal of Nanomaterials}, pages = {1--12}, publisher = {Hindawi Limited}, title = {{Stabilization of Electrospun PAN/Gelatin Nanofiber Mats for Carbonization}}, doi = {10.1155/2018/6131085}, volume = {2018}, year = {2018}, } @article{1079, abstract = { Fourfold magnetic nanoparticles, created from nanowires or in the form of an open square, offer the possibility of creating quaternary memory devices with four unambiguously distinguishable stable states at remanence. This feature, however, has been simulated for single magnetic nanoparticles or clusters with interparticle distances similar to the nanoparticle dimensions. For the possible use in bit-patterned media, it is important to understand the scaling behavior of the stability of the additional intermediate states with the interparticle distance. The paper investigates exemplarily nanoparticles of two shapes which were found to be optimum to gain four states at remanence. For clusters of these particles, the probability of reaching the additional intermediate states in all particles in the same field region is strongly reduced with decreased interparticle distance. The differences between both shapes indicate possible solutions for this problem in the form of new nanoparticle shapes. }, author = {Ehrmann, Andrea and Blachowicz, Tomasz}, issn = {1687-4129}, journal = {Journal of Nanomaterials}, pages = {1--6}, publisher = {Hindawi Limited}, title = {{Influence of the Distance between Nanoparticles in Clusters on the Magnetization Reversal Process}}, doi = {10.1155/2017/5046076}, volume = {2017}, year = {2017}, }