Free and self-trapped charge-transfer excitons in crystals of dipolar molecules of N,N-dimethylaminobenzylidene 1,3-indandione

Article Abstract:

Research was conducted to examine the excitonic transitions in organic molecular solids built up by dipolar molecules by various absorption and luminescence spectroscopy approaches. Films and crystals of dipolar molecules of N,N-dimethylaminobenzylidene 1,3-indandione (DMABI), which are typical examples of polar molecular compounds, were studied. For DMABI crystal, the exciton band parameters and the exciton-phonon coupling constant are estimated while the potential energy diagram of exciton self-trapping process is suggested.

Charge transfer

---

Electrochemical preparation of platinum nanocrystallites with size selectivity on basal plane oriented graphite surfaces

Article Abstract:

Research was conducted to examine the electrochemical preparation of platinum nanocrystallites with size selectivity on basal plane oriented graphite surfaces. It was observed from electron diffraction measurements that the platinum particles derived using the pulsed potentiostatic method are not epitaxially aligned with the graphite surface and are air stable for days. Both electrochemical studies and TEM imaging data demonstrate that both (111) and (100) facets are present on the surfaces of the platinum nanocrystals.

Platinum, Electrochemistry, Graphite

---

Free carrier generation in semiconductors induced by absorption of sub-band gap light. A photoelectrochemical study with nanoporous GaP

Article Abstract:

The primary mechanisms of electron-hole generation in a semiconductor caused by the adsorption of a sub-band gap photon have been studied. Electron-hole generation involves optical and thermal transitions between delocalized valence or conduction band states and localized band gap states. Free carrier generation may result in sub-band gap photocurrent flow in insulators and in n- and p-type semiconductors if there is a retrieval layer in which electrons and holes are effectively separated.

Analysis, Optical properties, Semiconductors, Photoabsorption

Similar abstracts:

• Abstracts: Linkage length dependence of intramolecular photoinduced electron transfer reactions in aromatic donor-viologen acceptor molecules linked by polymethylene bridges
• Abstracts: Theoretical study on the topochemical nature in the initiation process of the solid-state thermal isomerization reaction of methyl 4-(dimethylamino)benzenesulfonate
• Abstracts: The effect of salvation on biomolecular conformation: 2-amino-1-phenylethanol. A diffusive anomaly of water in aqueous sodium chloride solutions at low temperatures
• Abstracts: Formation and spectroscopic manifestation of silver clusters on silver bromide surfaces. Study of reactions of silver and sulfur clusters
• Abstracts: Computer-aided design and experimental application of a novel electrochemical cell: the confluence reactor. Mechanistic analysis of electrochemical oscillators using derivative feedback control techniques

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.