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808822

Sigma-Aldrich

Tungsten diselenide

Crystal, 99.995%

Synonym(s):
Tungsten (IV) selenide, Tungsten selenide
Linear Formula:
WSe2
CAS Number:
Molecular Weight:
341.76
MDL number:
PubChem Substance ID:
NACRES:
NA.23

Quality Level

description

Electrical properties: Semiconductor, p-type

assay

99.995%

form

crystals

L × W × H

0.5 cm × 0.5 cm × 0.1-0.15 mm, typical size, some variation in dimensions may occur with different batches

primary crystallite size

~10 mm (hexagonal)

SMILES string

[Se]=[W]=[Se]

InChI

1S/2Se.W

InChI key

ROUIDRHELGULJS-UHFFFAOYSA-N

Related Categories

Application

The two dimensional layered inorganic nanomaterials have drawn significant attention recently owing to their thickness dependent physical and chemical properties. They find applications in photocatalysis, phtotovoltaics, gas sensing, lithium ion batteries, field effect transistors, spintronics etc. Transition metal dischalcogenides represent an important class of inorganic 2D materials having the aforementioned applications.

Preparation Note

Store under nitrogen atmosphere.

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2

Storage Class Code

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

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Quotes and Ordering

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Gunjakar JL, et al.
The Journal of Physical Chemistry C, 118, 3847-3863 (2014)

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