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Nanocrystals

A nanocrystal and chalcogenide technology, applied in nanotechnology, nanooptics, nanotechnology, etc., can solve problems such as difficulty in large-scale implementation, inability to fine-tune the optical properties of nanocrystals, and unsuitable lead-based chalcogenide nanocrystals.

Pending Publication Date: 2021-11-12
QUANTUM SCI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since it controls the size (and uptake) of the nanocrystals by altering the side chains of the thiourea reactant, this method is difficult to perform on a large scale
[0006] Thus, although several methods are known for producing chalcogenide nanocrystals of lead, these methods do not allow a priori control of the crystal size and thus fine-tuning of the optical properties of the nanocrystals
Known methods also generally do not provide nanocrystals exhibiting a broad absorption range
Furthermore, known methods are not suitable for large-scale (e.g. commercially available) preparation of chalcogenide nanocrystals of lead

Method used

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Embodiment Construction

[0022] When describing aspects of the invention, unless the context dictates otherwise, the terms used are to be interpreted in accordance with the following definitions.

[0023] As used in the specification and the appended claims, the singular forms "a", "an" and "the" include both singular and plural referents unless the context clearly dictates otherwise. For example, "nanocrystal" refers to one nanocrystal or more than one nanocrystal. For example, "lead(IV)-containing compound" refers to one lead(IV)-containing compound or more than one lead(IV)-containing compound. When used with inclusive language, reference to a number includes combinations including that number or greater than that number.

[0024] As used herein, the terms "comprising", "comprises" and "comprised of" are synonymous with "including" ("including", "includes") or "containing" ("containing", "contains"), and is inclusive or open ended and does not exclude further unrecited components, elements or met...

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Abstract

The present invention provides the use of a lead (IV) containing compound to prepare a lead chalcogenide nanocrystal and a method for producing broadband lead chalcogenide nanocrystals in a low cost, size-controllable and scalable method, the method comprising contacting a lead (IV) containing compound with an organic acid and a chalcogen-containing reagent.

Description

technical field [0001] The present invention generally relates to lead chalcogenide nanocrystals. In particular, the present invention relates to methods for producing lead chalcogenide nanocrystals using lead(IV)-containing compounds. The invention also extends to lead chalcogenide nanocrystals obtained by this method and to the use of lead chalcogenide nanocrystals. Background technique [0002] Nanocrystals are useful in a wide variety of applications, for example because the optical properties of nanocrystals can be fine-tuned to provide desired properties. The optical properties of nanocrystals (such as light absorption and emission characteristics) can be fine-tuned by controlling the size of the nanocrystals. The largest nanocrystals produce the longest wavelengths (and lowest frequencies), while the smallest nanocrystals produce shorter wavelengths (and higher frequencies). The size of the nanocrystals can be controlled by the method by which the nanocrystals are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/56
CPCC09K11/661C09K11/881B82Y20/00B82Y40/00G01S17/894B82Y5/00B82Y15/00C01B19/007C01G21/08C01G21/10C01G21/20C01P2004/64C01P2006/60G01N1/30G01N33/587G01S7/4816
Inventor 庞浩李洁
Owner QUANTUM SCI LTD