Publications by authors named "Sharada Govinda"
The electron transport (ETp) efficiency of solid-state protein-mediated junctions is highly influenced by the presence of electron-rich organic cofactors or transition metal ions. Hence, we chose to investigate an interesting cofactor-free non-redox protein, streptavidin (STV), which has unmatched strong binding affinity for an organic small-molecule ligand, biotin, which lacks any electron-rich features. We describe for the first time meso-scale ETp via electrical junctions of STV monolayers and focus on the question of whether the rate of ETp across both native and thiolated STV monolayers is influenced by ligand binding, a process that we show to cause some structural conformation changes in the STV monolayers.
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- - Dielectric constants of MAPbX (X = Br, I) demonstrate significant temperature dependence near room temperature, unlike the stable dielectric constant of CsPbBr.
- - This temperature sensitivity in MAPbX is linked to the freedom of MA dipoles to rotate, verified by simulations showing their random orientations with a relaxation time of about 7 picoseconds at 300 K.
- - Investigating the effects of photoexcitation on these dipoles, results show no transient ferroelectric state, as indicated by the absence of a second harmonic signal across various delay times.