![]() ![]() The electronic states distributed along the zigzag edges have been revealed after a silicon-layer intercalation at the interface of NBN-8-ZGNR and Au (111). ![]() Chemical-bond-resolved non-contact atomic force microscopy (nc-AFM) imaging confirms the zigzag-terminated edges and the existence of NBN dopants. Here, we report the successful synthesis of ZGNR with a width of eight carbon zigzag lines and nitrogen-boron-nitrogen (NBN) motifs decorated along the zigzag edges (NBN-8-ZGNR) on Au (111) surface, which starts from a specially designed U-shaped monomer with preinstalled NBN units at the zigzag edge. The electronic structure of ZGNRs can be effectively tuned by different widths or dopants, which requires delicately designed monomers. Zigzag graphene nanoribbons (ZGNRs) with spin-polarized edge states have potential applications in carbon-based spintronics. On-surface synthesis and edge states of NBN-doped zigzag graphene nanoribbons In addition, the working principle of these hybrid nanographene-organic structured heterojunction phototransistor memory devices is described which provides new insight into the design of high-performance organic phototransistor devices. These findings demonstrate the high application potential of nanographenes in the field of optoelectronics. The device exhibits both good photosensitivity (3.6 × 10 5) and memory properties including long retention time (>1.5 × 10 5 s), large hysteresis (45.35 V), and high endurance for voltage-erasing and light-programming. Exposure to low intensity light (25.7 µW cm −2) for 1 s yields a memory window of 35 V, and the threshold voltage shift is found to be larger than 140 V under continuous light illumination. Here, a nanographene-based heterojunction phototransistor memory with large ∆ V th responses is reported. However, it is still a challenge to achieve a big memory window (threshold voltage response ∆ V th) for phototransistors. Organic phototransistors can enable many important applications such as nonvolatile memory, artificial synapses, and photodetectors in next-generation optical communication and wearable electronics. Nanographene-Based Heterojunctions for High-Performance Organic Phototransistor Memory Devices The study of the dielectric properties as a function of PANa content enables to determine a Debye relaxation regime for the COF/PANa blend with a maximum relaxation frequency of 15 Hz for the pristine COF and the COF/PANa blend, respectively, at their maximum operating temperatures. The humidity-dependent X-ray diffraction study reveals a strengthening of the stacking interaction along the COF (100) plane direction with increasing humidity, through the formation of H-bonding, thus promoting proton hopping. ![]() Electrochemical impedance spectroscopy investigations after activation at high temperature and relative humidity (RH) provide insights into the role of PANa, whose presence is key to preserve high σ at low RH. Here, a simple strategy is presented to improve the performance of poor COF-based proton conductors through addition of sodium polyacrylate (PANa) superadsorbent polymer. Although covalent organic frameworks (COFs) do not usually exhibit high intrinsic proton conductivity (σ), they have been recently proposed as solid polymer electrolytes in PEMFCs, thanks to their high crystallinity and stability to acids and bases. In this context, proton exchange membrane fuel cells (PEMFCs) are gaining ever-increasing attention as clean technology. The scarcity of fossil fuels calls for immediate action toward the development of clean and renewable energy resources. The Role of Superadsorbent Polymers on Covalent Organic Frameworks-Based Solid Electrolytes: Investigation of the Ionic Conductivity and Relaxation We derive the electron–phonon coupling within a non-orthogonal tight-binding framework and apply them to graphene as a test case. It interfaces with phonopy for vibrational modes and dftb+ to calculate transport properties. Herein, we present a new method based on the DFTB approach for computing electron–phonon couplings and relaxation times. Semi-empirical methods, like density functional tight binding (DFTB), provide a framework for obtaining quantitative results at moderate computational costs. The calculation of the electron–phonon coupling from first principles is computationally very challenging and remains mostly out of reach for systems with a large number of atoms. 7 society/special/themed/topical collections/issues/volumesĭFTBephy: A DFTB-based approach for electron–phonon coupling calculations.14 hot/special/very important papers/topics.Note the correlation between the surface tension of a liquid and the strength of the intermolecular forces: the stronger the intermolecular forces, the higher the surface tension. ![]()
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