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RESEARCH PRODUCT
Asymmetric tungsten oxide nanobrushes via oriented attachment and Ostwald ripening
Aswani YellaYoshio BandoUte KolbUjjal K. GautamMartin PanthöferWolfgang TremelEnrico MugnaioliDmitri Golbergsubject
Ostwald ripeningNanostructureMaterials scienceThermal decompositionInorganic chemistryGeneral Chemistryequipment and suppliesCondensed Matter Physicschemistry.chemical_compoundsymbols.namesakeField electron emissionTungstatechemistryTransmission electron microscopysymbolsGeneral Materials ScienceNanorodHigh-resolution transmission electron microscopydescription
Tungsten oxide nanobrushes were synthesized using a solvothermal approach that lead to self-branching in the presence of citric acid and hexadecylamine as surfactants. Our synthetic approach yielded branched nanorods of tungsten oxide in a single synthetic step. Based on our results, we propose a phenomenological pathway for the formation, branching, and assembly of these tungsten oxide brushes. The formation of tungsten oxide brushes proceeds by thermal decomposition of ammonium tungstate in the presence of citric acid and hexadecylamine. The pale blue powder obtained after solvothermal reaction was analyzed by X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). The field emission (FE) properties of the tungsten oxide nanostructures which can be tailored by their aspect ratio and the hierarchical nanostructures follow a Fowler–Nordheim behavior.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-01-01 |