Molecular dynamics study of tribological behavior of confined branched and linear perfluoropolyethers

Article Abstract:

A study was conducted to analyze the rheological characteristics of confined branched and linear perfluoropolyethers. Molecular dynamics simulations were carried out. The nonbonded interaction energy between an atom and atoms of other molecules were then examined. Results indicated that short periodic energy changes decrease and long periodic energy changes increase during increases in the slider velocity.

Research, Molecular dynamics, Thin films

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Uncovering coherent domain structure in a series of Pi-conjugated dendrimers by simultaneous three-photon absorption

Article Abstract:

The three-photon absorption (3PA) is studied in a series of 4,4'-bis(diphenylamino) stilbene-based dendrimers. It is shown that the cross section of the nonlinear absorption scales faster than in a linear fashion with the molecular size, which is a manifestation of the cooperative enhancement effect. In terms of largest coherence domain size, the optimum dendrimer generation is 4-arm G-0.

Photons, Biphenyl compounds, Biphenyls (Class of compounds)

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Topological effects in electron transfer: Applications to dendrimers and branched molecules

Article Abstract:

Electron-transfer rates for bridge-mediated electron transfer are calculated by solving steady-state Louville equation with phenomenological corrections for solvent interaction. Essential differences between linear chain bridge systems and dendrimeric systems are also focused.

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