Sensitivity of metal nanoparticle surface plasmon resonance to the dielectric environment

Article Abstract:

Electrodynamic simulations of gold nanoparticles spectra were used to investigate the sensitivity of localized surface plasmon band position to the refractive index, n, of the medium for nanoparticles of various shapes and nanoshells of various structures. The sensitivity results observed using accurate computational methods for dipolar plasmon bands of gold nanodisks, nanorods and hollow nonoshells extend, therefore, to particles of other shapes composed of other metals and to higher-order modes.

Electric properties, Electrodynamics

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Quenching of excited J aggregates on metals by surface plasmon excitations

Article Abstract:

The photocurrent spectrum of a coupler prism/Al/Langmuir-Blodgett (LB) film system was measured after the J aggregates in the LB film was subjected to surface plasmon polariton excitation. Results revealed p-polarized directional emission in the film system, demonstrating that metal electrodes can play an effective role as acceptor for excited J aggregates. The quenching of J aggregates resulted to the decrease in the efficiency of photoelectric conversion.

Research, Thin films, Multilayered, Multilayered thin films, Photoconductivity

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Interfacial electron transfer in metal cyanide-sensitized Ti[O.sub.2] nanoparticles

Article Abstract:

An analysis of the charge-transfer absorption from a transition-metal-cyanide complex to a Ti[o.sub.2] nanoparticle is done. It is suggested that the transition includes the transfer of an electron to a conduction-band state which is dominated by contributions from the Ti(IV) center coordinated to the metal-cyanide complexes and transition does not lead to the direct transfer of an electron into a state delocalized over the entire particle.

Charge transfer, Cyanides, Chemical properties

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