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550086

Sigma-Aldrich

Tungsten(VI) oxide

nanopowder, <100 nm particle size (TEM)

Synonym(s):

Tungstic anhydride

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About This Item

Linear Formula:
WO3
CAS Number:
1314-35-8
Molecular Weight:
231.84
EC Number:
215-231-4
MDL number:
MFCD00011466
UNSPSC Code:
12352302
PubChem Substance ID:
24879090
NACRES:
NA.23
Pricing and availability is not currently available.

form

nanopowder

Quality Level

100

particle size

<100 nm (TEM)

density

7.16 g/mL at 25 °C (lit.)

SMILES string

O=[W](=O)=O

InChI

1S/3O.W

InChI key

ZNOKGRXACCSDPY-UHFFFAOYSA-N

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General description

Tungsten oxide (WO3) nanopowder is a metallic powder that can be prepared by the calcination of ammonium paratungstate (APT) in the temperature range of 560°C and 850°C. It can be produced by a variety of techniques, such as electrodeposition, sputtering, milling, and chemical processes.[1]

Application

WO3 can be used for a variety of applications, such as electronics, optics, gas sensors and elecctrochromism.[2][3][4][5]

Storage Class Code

11 - Combustible Solids

WGK

nwg

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCX0223
0000246212
MKCS9702
0000246212
MKCR2040

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A thin-film sensing element for ozone, humidity and temperature
Qu W and Wlodarski W
Sensors and Actuators B, Chemical, 64(1-3), 42-48 (2000)
Thermal effects associated with the Raman spectroscopy of WO3 gas-sensor materials.
Garcia-Sanchez RF, et al.
The Journal of Physical Chemistry A, 117(50), 13825-13831 (2013)
Electrochromic tungsten oxide films: review of progress 1993-1998
Granqvist CG
Solar Energy Materials and Solar Cells, 60(3), 201-262 (2000)
Formation of Ruthenium Cluster on Nanocrystalline Tungsten Trioxide.
Fujioka Y, et al.
The Journal of Physical Chemistry C, 117(15), 7506- 7510 (2013)
?Writing-Reading-Erasing? on tungsten oxide films using the scanning electrochemical microscope
Turyan I, et al.
Advanced Materials, 12(5), 330-333 (2000)
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Questions

1–2 of 2 Questions  

  1. What is the size distribution for this particles? Can I observe them via AFM?

    1 answer

    1. Unfortunately, the size distribution of Product 550086 has not been tested. However, 100 nm particles should be visible in AFM.

      Helpful?

  2. Hi, I am interested to purchase these nanoparticles, is it possible to see the TEM images? I need spherical nanoparticles and could not see an indication of the shape. And lastly, are they stored in water? Thank you very much. Best regards

    1 answer

    1. These nanoparticles are generally spherical.

      See the TEM image below.

      Helpful?

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