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Porous organic polymer films (PFs) with intrinsical porosity and tuneable pore environment are ideally suited for application in electronic devices. However, the huge challenges still exist for construction of electronic devices based on PFs owing to lack of robustness, processability, and controllable preparation. Herein, we report the electrochemical preparation of carbazole‐based porous organic polymer films (eCPFs) as switchable materials for the memristors. These eCPFs possess the characteristics of controllable thickness/size, high stability, and excellent porosity. Carbazole and cyano groups are introduced into the eCPFs to constructing electron transfer systems. Thus, the memristors constructed based on these eCPFs exhibit excellent switching performance, reliability, and reproducibility. The electrochemically controllable preparation method of porous organic polymer membranes proposed in this paper provides a feasible idea for the developments of electronic devices. [ABSTRACT FROM AUTHOR]

Keywords: Electrochemical Polymerization; Electron Transfer Systems; Memristors; Porous Films; Porous Organic Polymers EN Electrochemical Polymerization Electron Transfer Systems Memristors Porous Films Porous Organic Polymers 1 1 1 09/14/22 20220919 NES 220919 B Electrochemical polymerizations b can be used to obtain porous organic polymer films for advanced electronic devices. Back Cover: Electrochemical Preparation of Porous Organic Polymer Films for High-Performance Memristors (Angew. Electrochemical Polymerization, Electron Transfer Systems, Memristors, Porous Films, Porous Organic Polymers. [Extracted from the article]

Keywords: Electrochemical Polymerization; Electron Transfer Systems; Memristors; Porous Films; Porous Organic Polymers EN Electrochemical Polymerization Electron Transfer Systems Memristors Porous Films Porous Organic Polymers 1 1 1 09/14/22 20220919 NES 220919 B Elektrochemische Polymerisationen b ermöglichen die Synthese von porösen organischen Polymerfilmen für moderne elektronische Funktionseinheiten. Electrochemical Polymerization, Electron Transfer Systems, Memristors, Porous Films, Porous Organic Polymers Rücktitelbild: Electrochemical Preparation of Porous Organic Polymer Films for High-Performance Memristors (Angew. [Extracted from the article]

We present studies on the electron transfer rate (etr) of the Fe(CN)63−/4− redox reaction on Au(111) electrodes in the presence and absence of a condensed two-dimensional camphor layer in NaClO4 electrolytes of different ionic strength. The experiments were carried out employing cyclic voltammetry, capacitance measurements and surface plasmon resonance (SPR) measurements. The interaction between the two-dimensional organic film and the Fe(CN)63−/4− redox couple depended strongly on the most positive potential of the experiment. If U was kept negative of a threshold potential Uth=−0.2 V vs. Hg ∣ Hg2SO4, the camphor adlayer slowed down the charge transfer rate, and the effect was more pronounced the smaller was the conductivity of the electrolyte. For potentials larger than Uth the camphor film was initially replaced by a polymeric hexacyanoferrate adsorbate that transformed after longer reaction times to a Prussian-white/Prussian-blue film, respectively. The initial destruction of the camphor film could be followed sensitively from changes in the cyclic voltammogram and in the capacitance and occurred within the first voltage cycle. SPR measurements allowed the transformation of the ‘precursor’ hexacyanoferrate film to a Prussian-white/Prussian-blue film to be monitored. Moreover, SPR measurements in solutions without camphor provided evidence that in a neutral NaClO4 supporting electroyte a bare Au surface does not exist in the presence of small amounts of Fe(CN)63− or Fe(CN)64− ions in most of the potential ranges usually employed. [Copyright &y& Elsevier]

Abstract: We investigate the electronic current-induced heat generation in a single level, , quantum dot (QD) with weak electron–electron interaction , and find that this interaction shows a cooling effect. We identify the mechanism behind this phenomenon: (1) Phonons (i.e., heat) can be absorbed by electrons as they tunnel through the QD. (2) Current-carrying electrons transfer a portion of their energy to the other electrons in the QD due to electron–electron interaction, and the energy is taken away as the heated electrons leave. As a result of the Coulomb interaction, a negative differential heat generation arises, and a heating valley emerges where the maximal current value locates. [Copyright &y& Elsevier]

Abstract: Au nanoparticle (AuNP) multilayer films were fabricated by combining interfacial assembly and layer-by-layer assembly. The key point is that the procedure does not require assistance of organic linker molecules, thus providing a suitable platform for the modification of biological molecules. Direct electron transfer can easily take place between a glassy carbon electrode and horseradish peroxidase (HRP) molecules adsorbed on AuNP films. The current density of direct electron transfer was closely related to the layer number, m, and reached a maximum value for m =4. The optimized HRP/AuNP multilayer film had a relatively rapid response and satisfactory selectivity for H2O2 detection. The linear range and the detection limit were 9.8×10−6 to 6×10−3 mol/L and ∼4.9×10−6 mol/L (S/N =3), respectively. [Copyright &y& Elsevier]