Abstract Understanding magnetotransport properties in semiconductors plays a vital role in either developing future spintronic or unveiling the underpinning physics of electronic dynamics. In recent years, the high‐field magnetoconductance (HFM, B ~ 1 T) in polymers has drawn intense discussions and always been attributed to thermal spin polarization (TSP). In this work, the HFMs in several benchmark polymers are proposed to be correlated to the ∆ g spin‐mixing effect, determined from their remarkable anisotropy in response to magnetic fields, which cannot be explained only by TSP. It is the fundamental difference between two spins' Lande factors stemming from the random orientations of molecular backbones that contributes to the intense ∆ g spin‐mixing effect, leading to HFMs' anisotropy as high as 150%. It is further found that the ∆ g spin‐mixing mechanism greatly correlates with the charge transport dynamics in polymers, in which a slow‐ to fast‐hopping crossover was observed and further verified by pressure‐dependent HFMs characteristics.
The increasing demands for more efficient and brighter thin-film light-emitting diodes (LEDs) in flat-panel display and solid-state lighting applications have promoted research into three-dimensional (3D) perovskites. These materials exhibit high charge mobilities and low quantum efficiency droop
The interfacial microstructure of a semicrystalline semiconductor polymer film is precisely modulated by the dielectric with surface roughness ranging from 0.15 to 0.39 nm, without affecting the morphology in the upper layers, as described by K. Müllen, W. Pisula, and co-workers. On page 2245, they demonstrate that the interfacial microstructure has only a minor impact on transistor performance because charge carriers can bypass the interfacial defects.
Additive manufacturing (AM), also known as 3D printing, has emerged as a transformative technology in various industries, providing unprecedented design freedom and customized manufacturing solutions. This paper presents a detailed exploration of additive manufacturing applications in metallic materials, introducing the various types of additive manufacturing technologies, elucidating their fundamental principles, and summarizing current research endeavors. The manuscript offers insights into future directions and challenges in this rapidly evolving field, serving as a valuable resource for researchers and engineers aiming to harness the potential of additive manufacturing in advancing metallic materials.
This paper reports on electrical resistance vs. aging time for the response of polyaniline films under exposure to water, ethanol and nitric acid (HNO3) solution. Camphor sulfonic acid-doped polyaniline films were prepared by a "doping-dedoping-redoping" method, the morphology and microstructures of the films were characterized by a scanning electron microscope and an x-ray diffractometer, the electrical resistance was measured by a four-probe method. It was found that a lower amount of water molecules infiltrating the film can decrease the film's resistance possibly due to an enhancement of charge carrier transfer between polyaniline chains, whereas excessive water molecules can swell inter-chain distances and result in a quick increase of resistance. The resistance of the film under exposure to ethanol increases and becomes much larger than the original value. However, HNO3 solution can decrease the film's resistance sharply possibly owing to doping effect of protonic acid. These results can help to understand the conduction mechanism in polyaniline films, and also indicate that the films have potential application in chemical sensors.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
Traditional self-assembling peptide can form nanofiber scaffolds to meet the challenges of advance biomaterial, cell culture, tissue engineering and regeneration. L-amino acids have been widely used instead of D-amino acids to design nanomaterial since some D-amino acids have toxicity of cells. Here we report that using D-amino acids to design a new D-form self-assembling peptide DSAP-2 and the circular dichroism, atomic force microscopy and scanning electron microscopy show that the peptide can form nanofiber scaffold as well. Furthermore, cell inhibition assay confirmed this D-form peptide show no toxicity of cells that can support cell growth. Fluorescence microscopy results show that cells had less cell apoptosis in the 3D environment and displayed a fast proliferation after cultured for 7days. Peptide’s hydrogel not only formed nano-scaffolds surrounded by cells in a 3-D cell culture, but achieved rapid hemostasis in a rabbit liver wound model. Our study suggests this peptide could be used in the wound and beyond in the future. This work could also inspire us to design more novel D-form self-assembling peptide in biomaterials and biomedical areas.
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