amorphous selenium red

Preparation of red amorphous selenium - Xerox Corporation

Red amorphous selenium is obtained by precipitating selenium from a solution of selenious acid in methanol or ethanol with hydrazine or a soluble salt thereof at a

Preparation of red amorphous selenium - Xerox Corporation

What is claimed is: 1. A process for producing stable red amorphous selenium in particles of less than about 5 microns which comprises precipitating selenious acid

US3954951A - Preparation of red amorphous selenium ...

Red amorphous selenium is obtained by precipitating selenium from a solution of selenious acid in methanol or ethanol with hydrazine or a soluble salt thereof at a

Sensitivity to red/green/blue illumination of amorphous ...

2008-2-1 · Sensitivity to red/green/blue illumination of amorphous selenium based photodetector driven by nitrogen (N)-Doped CVD diamond Author links open overlay panel Nanako

Amorphous Selenium and Nanostructures | SpringerLink

F. Gompf: The phonon densities of states of trigonal, vitreous and red amorphous selenium, J. Phys. Chem. Solids 42, 539–544 (1981) CrossRef Google Scholar B.

Selenium - lzu.edu.cn

2017-1-10 · The selenous acid is finally bubbled with sulfur dioxide producing elemental red amorphous selenium. Selenium produced in chemical reactions invariably appears

Selenium

2014-5-1 · Grey crysstalline selenium Grey selenium in glass sphere. Crystals of gray Selenium. Granules of amorphous selenium (4N) Ingot of amorphous selenium

Interaction of elemental mercury with selenium surfaces ...

2016-9-1 · The adsorption behavior of 197Hg and 183–185Hg on red amorphous selenium (red a-Se) and trigonal selenium (t-Se) was investigated experimentally by off-line and

Optical Properties of Selenium - ResearchGate

Measurements have been made of the refractive index of amorphous selenium in the red and near infra-red spectral region. The absorption coefficient of

Digital radiography using amorphous selenium ...

A new amorphous selenium (a-Se) digital radiography detector is introduced. The proposed detector generates a charge image in the a-Se layer in a conventional

amorphous selenium red - kokeneteke.be

Red amorphous selenium is obtained by precipitating selenium from a solution of selenious acid in methanol or ethanol with hydrazine or a soluble salt thereof at a temperature between about -20° C. and the freezing point of the solution. Furthermore, the stable red amorphous selenium may contain a .

Solution growth and characterization of amorphous

2001-6-8 · The red, amorphous selenium has a deformed chain structure, high resistivity (ρ=10 13 –10 16 Ω cm) and upon heat treatment transforms to stable hexagonal modification. In recent years, the great interest in various allotropes of selenium and their interconversion is due to its use in electronics and solid-state technology [9] , [10] , [13 ...

The thermal analysis of red amorphous selenium. -

The thermal analysis of red amorphous selenium. Bennett, Kathryn Grace (1970) The thermal analysis of red amorphous selenium. Masters thesis, Concordia University.

Selenium - lzu.edu.cn

2017-1-10 · The selenous acid is finally bubbled with sulfur dioxide producing elemental red amorphous selenium. Selenium produced in chemical reactions invariably appears as the amorphous red form-- an insoluble brick red powder. When this form is rapidly melted, it forms the black, vitreous form which is usually sold industrially as beads. ...

Transformations of red amorphous and monoclinic

adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

Solution growth and characterization of amorphous

The red amorphous selenium has a deformed chain structure and upon heat treatment transforms to stable hexagonal modification (Pejova and Grozdanov, 2001; Nguyen et al., 2013). Thus, on the whole ...

Selenium

2014-5-1 · Grey crysstalline selenium Grey selenium in glass sphere. Crystals of gray Selenium. Granules of amorphous selenium (4N) Ingot of amorphous selenium (99.5+%) Ingot of glassy selenium. Red selenium. Selenium rectifiers. Directionally solidified grey Selenium. Monoclinic Selenium crystals. Has dark red

Interaction of elemental mercury with selenium surfaces ...

2016-9-1 · The adsorption behavior of 197Hg and 183–185Hg on red amorphous selenium (red a-Se) and trigonal selenium (t-Se) was investigated experimentally by off-line and on-line gas chromatographic methods, in preparation of a sensitive chemical separation and characterization of the transactinides copernicium (Cn, Z = 112) and flerovium (Fl, Z = 114). Monte-Carlo simulations of a diffusion ...

Selenium in the Environment, Metabolism and

2014-6-18 · At ordinary temperature selenium is a solid substance [6]. Like sulfur, selenium takes various physical forms [5,9]. The amorphous selenium—a red-brick powder—is obtained by precipitation from aqueous solution. For example, it is obtained by reduction of a solution of selenious acid by hydrogen, zinc or sulfur dioxide. Its density is 4.26.

Digital radiography using amorphous selenium ...

A new amorphous selenium (a-Se) digital radiography detector is introduced. The proposed detector generates a charge image in the a-Se layer in a conventional manner, which is stored on electrode pixels at the surface of the a-Se layer. A novel method, called photoconductively activated switch (PAS)

The thermal analysis of red amorphous selenium. -

The thermal analysis of red amorphous selenium. Bennett, Kathryn Grace (1970) The thermal analysis of red amorphous selenium. Masters thesis, Concordia University.

Absorption, distribution, metabolism and excretion of ...

A suspension of nanoparticles of BSA-stabilized red amorphous elemental selenium (Se) or an aqueous solution of sodium selenite was repeatedly administered by oral gavage for 28 days at 0.05 mg kg(-1) bw per day (low dose) or at 0.5 mg kg(-1) bw per day (high dose) as Se to female rats. Prior to adm

The thermal analysis of red amorphous selenium. - CORE

The thermal analysis of red amorphous selenium. By Kathryn Grace Bennett Get PDF (10 MB)

Transformations of red amorphous and monoclinic

adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

Facts About Selenium | Live Science

2016-11-29 · Amorphous selenium is either red, in powder form, or black, in vitreous, or glassy, form. The most stable form of the element, crystalline hexagonal selenium, is a metallic gray, while crystalline ...

Solution growth and characterization of amorphous

A novel solution growth methodology for fabrication of amorphous, red selenium thin films and their conversion to the hexagonal, gray modification is presented. The method is based on deposition process from aqueous solution of selenosulfate by citric or ascorbic acid as oxidizing agents. The X-ray diffraction method is used for identification of the deposited materials.

Selenium

2014-5-1 · Grey crysstalline selenium Grey selenium in glass sphere. Crystals of gray Selenium. Granules of amorphous selenium (4N) Ingot of amorphous selenium (99.5+%) Ingot of glassy selenium. Red selenium. Selenium rectifiers. Directionally solidified grey Selenium. Monoclinic Selenium crystals. Has dark red

X-ray Imaging Research Group - Amorphous Selenium (a

2021-9-8 · Amorphous Selenium (a-Se) Many of the detector systems being developed in our lab use a photoconductor called amorphous Selenium (a-Se) as the X-ray detector material, i.e. the material which 'catches the X-rays', and converts them to either charge or lower energy photons.

Selenium in the Environment, Metabolism and

2014-6-18 · At ordinary temperature selenium is a solid substance [6]. Like sulfur, selenium takes various physical forms [5,9]. The amorphous selenium—a red-brick powder—is obtained by precipitation from aqueous solution. For example, it is obtained by reduction of a solution of selenious acid by hydrogen, zinc or sulfur dioxide. Its density is 4.26.

Canadian Soil Quality Guidelines SELENIUM for the ...

2021-3-12 · Amorphous selenium is dark red in powder form and bluish-black as a vitreous solid, while crystalline selenium is a deep red. The most stable form of selenium is termed grey or metallic selenium, also called crystalline hexagonal selenium, and is a lustrous grey to black colour. Se has four valence