Process for the thickness growth of colloidal nanosheets and materials composed of said nanosheets

• US 10,253,415 B2
• Filed: 10/19/2012
• Issued: 04/09/2019
• Est. Priority Date: 10/19/2011
• Status: Active Grant

• Current Assignee: Nexdot
• Original Assignee: Nexdot
• Inventors: Mahler, Benoit
• Primary Examiner(s): Patel, Ronak C
• Application Number:
  US14/352,887
• Publication Number:
  US 20140242389A1
• Time in Patent Office: 2,363 Days
• Field of Search: None
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 19/007 Tellurides or selenides of metals C01B19/002 takes precedence
• CPC Class Codes: C01B 19/008 Salts of oxyacids of selenium or tellurium
• CPC Class Codes: C01P 2004/24 Nanoplates, i.e. plate-like particles with a thickness from 1-100 nanometer
• CPC Class Codes: C01P 2004/80 Particles consisting of a mixture of two or more inorganic phases
• CPC Class Codes: C23C 18/1633 Process of electroless plating
• CPC Class Codes: H01L 21/0237 Materials
• CPC Class Codes: H01L 21/02521 Materials
• CPC Class Codes: H01L 21/02568 Chalcogenide semiconducting materials not being oxides, e.g. ternary compounds
• CPC Class Codes: H01L 21/02601 Nanoparticles fullerenes H10K85/211
• CPC Class Codes: H01L 21/02628 using solutions
• CPC Class Codes: Y10S 977/755 Nanosheet or quantum barrier/well, i.e. layer structure having one dimension or thickness of 100 nm or less
• CPC Class Codes: Y10S 977/81 Of specified metal or metal alloy composition
• CPC Class Codes: Y10S 977/811 Of specified metal oxide composition, e.g. conducting or semiconducting compositions such as ITO, ZnOx
• CPC Class Codes: Y10S 977/892 Liquid phase deposition
• CPC Class Codes: Y10T 428/2991 Coated

Abstract

A process of growth in the thickness of at least one facet of a colloidal inorganic sheet, by sheet is meant a structure having at least one dimension, the thickness, of nanometric size and lateral dimensions great compared to the thickness, typically more than 5 times the thickness. The process allows the deposition of at least one monolayer of atoms on at least one inorganic colloidal sheet, this monolayer being constituted of atoms of the type of those contained or not in the sheet. Homostructured and heterostructured materials resulting from such process as well as the applications of the materials are also described. By homostructured is meant a material of homogeneous composition in the thickness and by heterostructured is meant a material of heterogeneous composition in the thickness.

Claims

1. An inorganic colloidal nanoparticle comprising an initial inorganic nanosheet partially or totally covered with at least one monolayer of inorganic material, wherein the initial inorganic nanosheet is an inorganic colloidal nanosheet, wherein the inorganic colloidal nanoparticle has a thickness of 0.5 nm to 10 mm, wherein the initial inorganic nanosheet comprises a material MxEy, wherein:

M is Zn, Cd, Hg, Cu, Ag, Au, Ni, Pd, Pt, Co, Fe, Ru, Os, Mn, Tc, Re, Cr, Mo, W, V, Nd, Ta, Ti, Zr, Hf, Be, Mg, Ca, Sr, Ba, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb, Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or a mixture thereof, E is O, S, Se, Te, N, P, As, F, Cl, Br, I, or a mixture thereof, and x and y are independently a decimal number from 0 to 5, and wherein the initial inorganic nanosheet is partially or totally covered by a monolayer of a material M or E wherein;

M is Zn, Cd, Hg, Cu, Ag, Au, Ni, Pd, Pt, Co, Fe, Ru, Os, Mn, Tc, Re, Cr, Mo, W, V, Nd, Ta, Ti, Zr, Hf, Be, Mg, Ca, Sr, Ba, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb, Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or a mixture thereof, and E is O, S, Se, Te, N, P, As, F, Cl, Br, I, or a mixture thereof.

2. The inorganic collodial nanoparticle according to claim 1, whose lateral dimensions are at least 1.5 times its thickness.

3. The inorganic collodial nanoparticle according to claim 1, wherein the initial inorganic nanosheet is partially or totally covered by at least two monolayers, where the monolayers are alternatively composed of M then E or conversely,

wherein M is Zn, Cd, Hg, Cu, Ag, Au, Ni, Pd, Pt, Co, Fe, Ru, Os, Mn, Tc, Re, Cr, Mo, W, V, Nd, Ta, Ti, Zr, Hf, Be, Mg, Ca, Sr, Ba, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb, Bi, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or a mixture thereof, and

E is O, S, Se, Te, N, P, As, F, Cl, Br, I, or a mixture thereof.

4. The inorganic colloidal nanoparticle according to claim 1, wherein the inorganic colloidal nanoparticle has a core/shell structure.

5. A product comprising at least one inorganic colloidal nanoparticle according to claim 1, wherein the product is a luminescent system, an electroluminescent system, an amplifying stage of a laser, a catalyst, a photovoltaic cell, or a transistor.