Preparation of monodisperse platinum nanocrystal core-poly (amidoamine) (PAMAM) dendrimer shell structures as monolayer films

Article Abstract:

Preparation of size-monodisperse hybrid nanoparticles of carboxyl-terminated generation 4.5 PAMAM dendrimers (ethylenediamine core) [G4.5-COO (super -)] that encapsulate platinum nanocrystals inside them, and the formation of monolayer films from the obtained nanoparticles as globular building blocks that make the array of dendrimers readily observable by transmission electron microscopy (TEM). The particle was identified as core/shell nanocomposites of platinum nanoparticles and PAMAM molecules.

Electric properties, Monomolecular films, Amines

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Enhanced fluorescent emission of organic nanoparticles of an intramolecular proton transfer compound and spontaneous formation of one-dimensional nanostructures:

Article Abstract:

Nanoparticles of an intramolecular proton transfer molecule, N,N'-bis(salicylidene)-p-phenylenediamine are prepared by reprecipitation and are characterized by scanning electron microscopy (SEM), absorption, and fluorescence spectra. A mechanism for the enhanced emission is proposed on the basis of flattened molecules and a possible model for change of the nanoparticles' shape on the basis of theoretical calculations is proposed.

Observations, Fluorescence

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Self-assembled gold nanoparticle/alkanedithiol films: preparation, electron microscopy, XPS analysis, charge transport, and vapor sensing-properties

Article Abstract:

The molecular structure, composition, conductivity and vapor sensing properties of alkanedithiol- interlinked gold nanoparticle films and its dependence on the alkylene chain length is systematically investigated. XPS analysis of the films revealed that, during the film assembly process, the dodecylamine ligands were quantitatively exchanged by alkanedithiols.

Charge transfer

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