Search results for "bi2s3"

showing 3 items of 3 documents

Relative Humidity Dependent Resistance Switching of Bi2S3Nanowires

2017

Electrical properties of Bi2S3nanowires grown using a single source precursor in anodic aluminum oxide templates are sensitive to the relative humidity in an inert gas environment. Dynamic sensing dependency is obtained and shows presence of spontaneous resistance switching effect between low and high relative humidity states. Employing the thermionic field emission theory, heights of Schottky barriers are estimated from the current-voltage characteristics and in relation to the humidity response. The change of Schottky barrier height is explained by local changes in physically adsorbed water molecules on the surface of the nanowire.

Materials scienceArticle SubjectSchottky barrierNanowireSemiconductor nanowiresBi2S3 nanowires02 engineering and technologyFunctional devices010402 general chemistry01 natural sciencesAdsorptionlcsh:Technology (General)MoleculeGeneral Materials ScienceRelative humidityInert gasNanowiresfood and beveragesHumiditySchottky diode021001 nanoscience & nanotechnologyhumanitiesDynamic sensing dependencySchottky barriers0104 chemical sciencesChemical physicslcsh:T1-9950210 nano-technologyJournal of Nanomaterials
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Space charge limited current mechanism in Bi2S3 nanowires

2016

We report on the charge transport properties of individual Bi2S3 nanowires grown within the pores of anodized aluminum oxide templates. The mean pore diameter was 80 nm. Space charge limited current is the dominating conduction mechanism at temperatures below 160 K. Characteristic parameters of nanowires, such as trap concentration and trap characteristic energy, were estimated from current-voltage characteristics at several temperatures.

Materials scienceOxideNanowireGeneral Physics and AstronomyNanotechnology02 engineering and technologyBi2S3 nanowires010402 general chemistry01 natural sciencesCrystalsSpace chargeSemiconductor materialschemistry.chemical_compoundElectrical resistivity and conductivityElectrical conductivityPorosityArraysCharacteristic energyAnodizingNanowiresMemristor021001 nanoscience & nanotechnologyThermal conductionSpace charge0104 chemical scienceschemistryChemical physics0210 nano-technologyPorosityBismuth compounds
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Preparation and characterisation of optical and optoelectronic devices based in two-dimensional semiconductors

2020

In the Materials Science field, two-dimensional materials have gained the scientific community attention in recent years. The change and the appearance of novel properties when their thickness is reduced to nanometric scale has special interest for its fundamental properties study for, from this base, the design and its implementation in devices. The wide variety of materials with the possibility of being exfoliated at the two-dimensional level opens the field to different applications, from optoelectronic devices, detection and sensing, energy storage, catalysis, medical applications and quantum information technologies, among others. This thesis gathers results in both directions: a funda…

bi2s3spectroscopynanomaterialesinsemateriales bidimensionalesdispositivos optoelectrónicosperovskitesmoo3waveguidesUNESCO::FÍSICA::Física del estado sólido ::Dispositivos de estado sólido:FÍSICA::Física del estado sólido ::Dispositivos de estado sólido [UNESCO]two-dimensional semiconductorsresonadores microesféricosguías de ondagasemose2optoelectronic devicesespectroscopíawse2perovskitasnanomaterialsmicrospherical resonators
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