Sheets of transition metal dichalcogenides

Details Sheets of transition metal dichalcogenides Sheets of transition metal dichalcogenides

B - Operations, Transporting

05

D

117/117, 117/210

B05D 1/20 (2006.01) C07F 11/00 (2006.01)

Patent

CA 2005826

Compositions of the formula MX2:Y, wherein MX2 is a layer type transition metal dichalcogenide, M is a metal selected from the group consisting of niobium, tantalum, molybdenum and tungsten, X is a chalcogen selected from the group consisting of sulfur and selenium and Y is a material located between layers of MX2. The compositions may be prepared by the steps of first forming a suspension of the MX2 in a body of water. A liquid which is immiscible with water is added to the suspension. The suspension and immiscible liquid are agitated together to form a temporary emulsion. The emulsion is allowed to rest until the water and the liquid separate with an interface therebetween. A sheet-like composition of MX2:Y forms at the interface. Preferably, the MX2 is in exfoliated, singular molecular thickness layers suspended in the water. The MX2:Y compositions may be used to coat objects or provide films for applications requiring the special properties of MX2:Y, including selective optical filters and energy selective x-ray focusing devices.

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