Field emission properties of low-temperature, hydrothermally grown tungsten oxide.

作者: Maria Trapatseli , Dimitra Vernardou , Panagiotis Tzanetakis , Emmanuel Spanakis

DOI: 10.1021/AM200519W

关键词: Aqueous solutionAnalytical chemistryMaterials scienceDeposition (law)Sodium tungstateField electron emissionVisible spectrumMonoclinic crystal systemHydrothermal circulationTransmittanceInorganic chemistry

摘要: Tungsten oxide layers have been prepared on conductive glass substrates using aqueous chemical growth from a sodium tungstate precursor at low-temperature hydrothermal conditions. The deposits were then tested as cold electron emitters. Traceable could be deposited only within narrow pH range of 1.5–2 time length not exceeding 4 h. Transmittance in the visible spectrum was found to decrease with deposition time. presence both monoclinic and hexagonal phases always detected. At longest times highest concentrations, morphologies comprise randomly oriented spikes or rods. overall emission performance is improve concentration. role morphology properties films discussed.

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