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US 12,015,092 B2Granted
Physical forms of MXene materials exhibiting novel electrical and optical characteristics
AssigneeDrexel University
InventorsMichael J Ghidiu, Michel W Barsoum, Yury Gogotsi, Aaron Thomas Fafarman, Andrew DeVries Dillon
Life of this patent
Estimating the term…
Abstract
The present invention(s) is directed to novel conductive Mn+1Xn(Ts) compositions exhibiting high volumetric capacitances, and methods of making the same. The present invention(s) is also directed to novel conductive Mn+1Xn(Ts) compositions, methods of preparing transparent conductors using these materials, and products derived from these methods.
Claims17
An article, comprising:
- a substrate,
- the substrate having disposed thereon a coating that comprises a Mn+1Xn(Ts) composition having multiple layers, each layer having a first and second surface,
- 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 3, 4, 5, 6, or 7 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 the layers has surface terminations, Ts, independently comprising alkoxide, alkyl, carboxylate, halide, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, sulfonate, thiol, or a combination thereof,
- said coating being electrically conductive and exhibiting:
- (i) a resistivity in a range of from about 0.01 to about 1000 micro-ohm-meters;
- (ii) an ability to transmit at least about 50% of incident light of at least one wavelength in a range of from about 300 nm to about 2000 nm
- (iii) a ratio of DC conductivity, measured in Siemens/meter, to light absorbance, (including visible light absorbance), measured as a decadic absorbance per meter, of at least 0.1 Siemens measured at least one wavelength in the range of 300 to 2500 nm;
- (iv) a value of the real dielectric permittivity less than negative one for wavelengths greater than a threshold wavelength;
- or
- (v) a combination of any two or more of (i), (ii), (iii), and (iv),
- wherein the substrate is comprised in a plasmonic device, wherein the plasmonic device comprises an optical-to-electrical signal transducer a surface-plasmon polariton transmitter, or an infrared-reflecting window.
14 more elements
An article, comprising:
- a substrate,
- the substrate having disposed thereon a coating that comprises a Mn+1Xn(L) composition having multiple layers, each layer having a first and second surface,
- 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 3, 4, 5, 6, or 7 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 the layers has surface terminations, Ts, independently comprising alkoxide, alkyl, carboxylate, halide, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, sulfonate, thiol, or a combination thereof,
- said coating being electrically conductive and exhibiting:
- (i) a resistivity in a range of from about 0.01 to about 1000 micro-ohm-meters;
- (ii) an ability to transmit at least about 50% of incident light of at least one wavelength in a range of from about 300 nm to about 2000 nm
- (iii) a ratio of DC conductivity, measured in Siemens/meter, to light absorbance, (including visible light absorbance), measured as a decadic absorbance per meter, of at least 0.1 Siemens measured at least one wavelength in the range of 300 to 2500 nm;
- (iv) a value of the real dielectric permittivity less than negative one for wavelengths greater than a threshold wavelength;
- or
- (v) a combination of any two or more of (i), (ii), (iii), and (iv),
- wherein the substrate is comprised in a metamaterial, wherein the metamaterial comprises cloaking material, transformational optic component, or a superlens.
14 more elements
An article, comprising:
- a substrate,
- the substrate having disposed thereon a coating that comprises a Mn+1Xn(Ts) composition having multiple layers, each layer having a first and second surface,
- 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 3, 4, 5, 6, or 7 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 the layers has surface terminations, Ts, independently comprising alkoxide, alkyl, carboxylate, halide, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, sulfonate, thiol, or a combination thereof,
- said coating being electrically conductive and exhibiting:
- (i) a resistivity in a range of from about 0.01 to about 1000 micro-ohm-meters;
- (ii) an ability to transmit at least about 50% of incident light of at least one wavelength in a range of from about 300 nm to about 2000 nm
- (iii) a ratio of DC conductivity, measured in Siemens/meter, to light absorbance, (including visible light absorbance), measured as a decadic absorbance per meter, of at least 0.1 Siemens measured at least one wavelength in the range of 300 to 2500 nm;
- (iv) a value of the real dielectric permittivity less than negative one for wavelengths greater than a threshold wavelength;
- or
- (v) a combination of any two or more of (i), (ii), (iii), and (iv),
- wherein the Mn+iXn(Ts) composition comprises a plurality of Mn+1Xn(Ts) platelets having at least one mean lateral dimension in a range or from about 0.1 micron to about 50 microns.
14 more elements
An article, comprising:
- a substrate,
- the substrate having disposed thereon a coating that comprises a Mn+1Xn(Ts) composition having multiple layers, each layer having a first and second surface,
- 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 3, 4, 5, 6, or 7 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 the layers has surface terminations, Ts, independently comprising alkoxide, alkyl, carboxylate, halide, hydroxide, hydride, oxide, sub-oxide, nitride, sub-nitride, sulfide, sulfonate, thiol, or a combination thereof, said coating being electrically conductive and exhibiting:
- (i) a resistivity in a range of from about 0.01 to about 1000 micro-ohm-meters;
- (ii) an ability to transmit at least about 50% of incident light of at least one wavelength in a range of from about 300 nm to about 2000 nm
- (iii) a ratio of DC conductivity, measured in Siemens/meter, to light absorbance, (including visible light absorbance), measured as a decadic absorbance per meter, of at least 0.1 Siemens measured at least one wavelength in the range of 300 to 2500 nm;
- (iv) a value of the real dielectric permittivity less than negative one for wavelengths greater than a threshold wavelength;
- or
- (v) a combination of any two or more of (i), (ii), (iii), and (iv),
- wherein M comprises at least two Group 4, 5, 6, or 7 metals, and Mn+iXn(Ts) composition is represented by a formula M′2M″mXm+1(Ts), where m=n−1,
- where M′ is a first metal from Group 4, 5, 6, or 7 and where M″ is a second metal from Group 4, 5, 6, or 7.
14 more elements
The article of 10, wherein comprises M′2M″mXm+1, comprises Mo2TiC3, Mo2V2C3, Mo2Nb2C3, Mo2Ta2C3, Cr2Ti2C3, Cr2V2C3, Cr2Nb2C3, Cr2Ta2C3, Nb2Ta2C3, Ti2Nb2C3, Ti2Ta2C3, V2Ta2C3, V2 b2C3, V2Ti2C3, or a combination thereof.
Dependencies are inferred from the claim text.