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US 9,416,011 B2Granted
Compositions comprising free-standing two-dimensional nanocrystals
AssigneeDrexel University
InventorsMichel W. Barsoum, Yury Gogotsi, Michael Naguib Abdelmalak, Olha Mashtalir
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Abstract
The present invention is directed to compositions comprising free standing and stacked assemblies of two dimensional crystalline solids, and methods of making the same.
Claims34
A polymer composite comprising:
- (a) an organic polymer;
- and
- (b) a planar MXene composition comprising at least one layer having first and second surfaces, each layer comprising:
- a substantially two-dimensional array of crystal cells,
- each crystal cell having an empirical formula of Mn+1Xn, such that each X is positioned within an octahedral array of M,
- wherein M is at least one Group IIIB, IVB, VB, or VIB metal,
- wherein each X is C, N, or a combination thereof and
- n=1, 2, or 3;
- wherein at least one of said surfaces of each layer has surface terminations comprising alkoxide, carboxylate, halide, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, thiol, or a combination thereof;
- wherein the planar MXene composition is distributed within the polymer.
7 more elements
A conductive composition comprising
- a planar MXene composition comprising at least one layer having first and second surfaces, each layer comprising:
- a substantially two-dimensional array of crystal cells,
- each crystal cell having an empirical formula of Mn+1Xn, such that each X is positioned within an octahedral array of M,
- wherein M is at least one Group IIIB, IVB, VB, or VIB metal,
- wherein each X is C, N, or a combination thereof and
- n=1, 2, or 3;
- wherein at least one of said surfaces of each layer has surface terminations comprising alkoxide, carboxylate, halide, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, thiol, or a combination thereof;
- said assembly having thickness of from 15 nm to 75 nm and a surface resistivity of less than about 50 micro-ohm-meter.
5 more elements
An electronic device comprising a stacked assembly of at least two layers having first and second surfaces, each layer comprising:
- a substantially two-dimensional array of crystal cells,
- each crystal cell having the empirical formula of Mn+1Xn, such that each X is positioned within an octahedral array of M;
- wherein M is a Group IIIB, IVB, VB, or VIB metal;
- each X is C, N, or a combination thereof;
- and
- n=1, 2, or 3;
- wherein at least one of said surfaces of each layer has bound thereto surface terminations comprising alkoxide, carboxylate, halide, hydroxide, hydride, oxide, sub-oxide, nitride, subnitride, sulfide, thiol, or a combination thereof;
- said stacked assembly having a surface resistivity of less than about 50 micro-ohm-meter.
5 more elements
A suspension of delaminated flakes, the flakes comprising MXene compositions comprising:
- at least one layer having first and second surfaces, each layer comprising:
- a substantially two-dimensional array of crystal cells,
- each crystal cell having an empirical formula of Mn+1Xn, such that each X is positioned within an octahedral array of M,
- wherein M is at least one Group IIIB, IVB, VB, or VIB metal,
- wherein each X is C, N, or a combination thereof and
- n=1, 2, or 3;
- wherein at least one of said surfaces of each layer has surface terminations comprising alkoxide, carboxylate, halide, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, thiol, or a combination thereof.
4 more elements
Dependencies are inferred from the claim text.