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Pedro A Derosa

Publications and source records attributed to Pedro A Derosa.

3 recordsLinked to original sources

Vibrational study of a molecular device using molecular dynamics simulations.

A Potential scenario for the implementation of molecular electronic systems is introduced by applying digital signal processing techniques to results from classical molecular dynamics simulations of a molecular system interconnected by nanosize gold clusters. Under this new scenario, signals can be introduced, processed, and read through interactions with the internal vibrational modes of the small molecular unit. We use modulation operations intrinsically inherent to any molecular system as a concept proof. As an example of this type of analysis, we focus on the individual oscillations between C-H and C-C bonds and cluster-cluster displacements.

Carbon↗

A programmable molecular diode driven by charge-induced conformational changes.

The 3-nitro-2-(3'-nitro-2'-ethynylpyridine)-5-thiopyridine molecule shows charge-induced conformational switching and a rectifying behavior with a charge-induced controllable switching. This device can be used as a memory operated with an external field interacting with one of the rings local dipole. Alternatively, the molecule can be used as a nano-actuator controlling the rotation of the ring by charging the molecule with a bias voltage.

Journal Article↗

Theoretical interpretation of switching in experiments with single molecules.

Identifying the factors that trigger current-switching behavior of single molecules establishes the means by which it may be possible to tailor these molecules to perform as electronic devices. We provide a theoretical interpretation of switching observed in recent experiments with single molecules using quantum chemistry tools. We conclude that the switching observed in the experiment is mostly due to conformational changes and that some charge changes cannot be observed in STM experiments.

Journal Article↗