A skin-like cellulose biomimetic hydrogel was prepared based on dynamic covalent chemistry, which realized the combination of ultra-stretchability, self-healing, adhesiveness, antibacterial and mechano-stimuli sensitivity within a single structure.
Organic π‐conjugated materials, which have advantages of tailorable chemical structures, solution processability, and mechanical flexibility, are promising candidates for applications in low‐cost, portable gas sensors that operate at room temperature. Nevertheless, there are still challenging issues in the development of organic semiconductor gas sensors because of issues such as relatively poor sensitivity, slow response, and low recovery. Herein, we summarize the recent progress of gas sensors based on organic conjugated materials and discuss the critical factors related to the sensor performance and the operation mechanism. We highlight six types of typical materials from small molecule to polymer semiconductors with respect to their performance in detecting different gas species through morphology control and molecular engineering. Critical factors from gas kinetics to sensor‐analyte interaction are briefly discussed, together with an examination of sensing mechanisms.
In this work we present a theoretical connection between the Landauer picture utilized in quantum transport and the Gerischer picture utilized in electrochemistry. A comprehensive analysis of the single-particle picture and total energy picture in electrochemistry is presented, followed by derivation of electron transfer rates utilizing the nonequilibrium Green's function formalism. Correlations are also made with the Marcus−Hush theoretical approach more often utilized in electrochemistry. The analysis is limited to tunneling (also called outer-sphere) electrochemical reactions. In general, it is expected that this work will serve to further bridge the diverse condensed matter and chemistry foundations inherent to interfacial electrochemistry.
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