Nexdot

Saint-gobain Glass France

Sandrine Ithurria

Benoit Dubertret

Thierry Gacoin

Jean-Pierre Boilot

Arnaud Huignard

Benoit Mahler

Khalid Lahlil

Benoît Dubertret

A process for manufacturing colloidal nanosheet, by lateral growth, on an initial colloidal nanocrystal, of a crystalline semiconductor material represented by the formula MX, where M is a transition metal and X a chalcogen. The process includes the following steps: The preparation of a first organic solution, non or barely coordinating used as a synthesis solvent and including at least one initial colloidal nanocrystal; The preparation of a second organic solution including precursors of M and X, and including an acetate salt. And the slow introduction over a predetermined time scale of a predetermined amount of the second solution in a predetermined amount of the first solution, at a predetermined temperature for the growth of nanosheets. The use of the obtained material is also presented.

Process for manufacturing colloidal nanosheets by lateral growth of nanocrystals

A colloidal material including semiconductor nanocrystals of formula AnXm, wherein A is selected from group Ib, IIa, IIb, IIIa, IIIb, IVa, IVb, Va, Vb, VIb, VIIb, VIII, IIb, III, IV or mixtures thereof, X is selected from group Va, VIa, VIIa or mixtures thereof, and n and m are independently a decimal number from 0 to 5. The semiconductor nanocrystals have a quasi 2D structure, wherein the smallest dimension is smaller than the other two dimensions by a factor of at least 1.5 and the faces substantially normal to the smallest dimension consist either of A or X. Also, a semiconducting thin film, an optoelectronic device, a laser, a photovoltaic cell, a diode, a light emitting diode or a display including the colloidal material.

Process for manufacturing colloidal materials, colloidal materials and their uses

A colloidal material and a process for manufacturing it and uses of the colloidal material for manufacturing optic devices. The colloidal material is of formula AX, wherein A is an element selected from groups II, III or IV of the periodic table; X is a metal selected from groups V or VI; and in the selection of the pair (A, X), the groups of the periodic table of A and X, respectively, are selected from the following combinations: (group II, group VI), (group III, group V) or (group IV, group VI); and n and m are such that AXis a neutral compound. The colloidal compound may be CdS, InP, or PbS. The process includes a step of solution phase decomposition of a mixture of X and a carboxylate of formula A(R&#x2014;COO)in the presence of a non- or weakly-coordinating solvent, and injecting an acetate salt or acetic acid in the mixture; wherein p is an integer between 1 and 2; R is a linear or branched Calkyl group.

Hydrophobic treatment composition comprising one or more compounds, as a mixture, corresponding to the formula in which

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Paris, France

Sandrine Ithurria