WSE

WSE may refer to:

Tungsten diselenide

Tungsten diselenide is an inorganic compound with the formula WSe₂. The compound adopts a hexagonal crystalline structure similar to molybdenum disulfide. Every tungsten atom is covalently bonded to six selenium ligands in a trigonal prismatic coordination sphere while each selenium is bonded to three tungsten atoms in a pyramidal geometry. The tungsten– selenium bond has a length of 0.2526 nm, and the distance between selenium atoms is 0.334 nm. Layers stack together via van der Waals interactions. WSe₂ is a very stable semiconductor in the group-VI transition metal dichalcogenides.

Synthesis

Heating thin films of tungsten under pressure from gaseous selenium and high temperatures (>800 K) using the sputter deposition technique leads to the films crystallizing in hexagonal structures with the correct stoichiometric ratio.

Potential applications

Transition metal dichalcogenides are semiconductors with potential applications in solar cells. WSe
2 has a band-gap of ~1.35 eV with a temperature dependence of -4.6×10⁻⁴ eV/K.WSe
2 photoelectrodes are stable in both acidic and basic conditions, making them potentially useful in electrochemical solar cells.

Web Services Enhancements

Web Services Enhancements (WSE) is an obsolete add-on to the Microsoft .NET Framework, which includes a set of classes that implement additional WS-* web service specifications chiefly in areas such as security, reliable messaging, and sending attachments. Web services are business logic components which provide functionality via the Internet using standard protocols such as HTTP. Web services communicate via either SOAP or REST messages. WSE provides extensions to the SOAP protocol and allows the definition of custom security, reliable messaging, policy, etc. Developers can add these capabilities at design time using code or at deployment time through the use of a policy file.

WSE has been replaced by Windows Communication Foundation (WCF).

Versions

All versions install side-by-side.