Modeling of Piezoelectric Nanodevices Falconi, Christian; Mantini, Giulia; D’Amico, Arnaldo ...
Piezoelectric Nanomaterials for Biomedical Applications
Book Chapter
Since fabrication, characterization, and integration into practical devices of nanostructures is unavoidably complex and expensive, accurate models are crucial for designing high performance ...nanostructures-based devices. Moreover, piezoelectric nanotransducers may have several crucial advantages when compared with the correspondent macro- or micro-devices. For these reasons, after reviewing both piezoelectric constitutive equations and equivalent circuits for piezoelectric transducers, we show how these tools can be applied to analysis and design of practical piezoelectric nanodevices. As an important example, we choose piezoelectric nanogenerators; however, by analyzing this type of devices, we discuss the key general concepts and challenges for modeling piezoelectric nanodevices.
Ternary complexes of wild type or mutant form of human DNA polymerase β (pol β) bound to DNA and dCTP substrates were studied by molecular dynamics (MD) simulations. The occurrences of contact ...configurations (CC) of structurally important atom pairs were sampled along the MD trajectories, and converted into free-energy differences, Δ
G
CC. Δ
G
CC values were correlated with the experimental binding and catalytic free energies for the wild type pol β and its Arg183Ala, Tyr271Ala, Asp276Val, Lys280Gly, Arg283Ala, and Glu295Ala mutants. The correlation coefficients show that the strength of the H-bond between dCTP and Asn279 is a strong predictor of the mutation-induced changes in the catalytic efficiency of pol β. This finding is consistent with the view that enzyme preorganization plays a major role in controlling DNA polymerase specific activity.
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The characteristic of I D- V DS curve is related by applying voltages to Schottky gate in AlGaN/GaN HEMTs. The measurement of drain and source resistances shown that the current increase was caused ...by inducing the 2DEG charge between drain and source electrodes. In this study, we evaporate different configurations of contacts to analyze its I D -V DS characteristics.
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