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Tungsten Nanoparticles

Catalog Number
ACM744033727
Product Name
Tungsten Nanoparticles
Structure
CAS Number
7440-33-7
MDL Number
MFCD00011461
Synonyms
Wolfram nanoparticles
Molecular Weight
183.85
Molecular Formula
W
Boiling Point
3410 °C
Melting Point
3410 °C
Density
True Density 19.3 kg/cm3
Bulk Density 3.5 g/cm3
Purity
99%, 99.9%, 99.99%, 99.999%
Appearance
Black
Hazard Statements
H228-H315-H319
particles size
<70 nm
Special Surface Area(Square meters per gram)
20m2/g
Ratio(Poisson's Ratio)
Poisson's Ratio 0.28
Young's Modulus
411 GPa
Vickers Hardness
3430 MPa
Morphology
spherical
Thermal Expansion
(25 °C) 4.5 µm·m-1·K-1
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1Long-Lived Valley Polarization of Intravalley Trions in Monolayer WSe_{2}.

Singh A1, Tran K1, Kolarczik M2, Seifert J1, Wang Y1, Hao K1, Pleskot D3, Gabor NM3, Helmrich S2, Owschimikow N2, Woggon U2, Li X1.

Phys Rev Lett. 2016 Dec 16;117(25):257402. doi: 10.1103/PhysRevLett.117.257402. Epub 2016 Dec 16.

We investigate valley dynamics associated with trions in monolayer tungsten diselenide (WSe_{2}) using polarization resolved two-color pump-probe spectroscopy. When tuning the pump and probe energy across the trion resonance, distinct trion valley polarization dynamics are observed as a function of energy and attributed to the intravalley and intervalley trions in monolayer WSe_{2}. We observe no decay of a near-unity valley polarization associated with the intravalley trions during ∼ 25  ps, while the valley polarization of the intervalley trions exhibits a fast decay of ∼4  ps. Read More

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Email:
Tel:1-201-478-8534
1-516-662-5404
Fax: 1-516-927-0118
Address: 2200 Smithtown Avenue, Room 1 Ronkonkoma, NY 11779-7329 USA