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Nontoxic diluted-magnetic quantum dot material with fluorescence and room temperature ferromagnetism, and preparation method thereof

A technology of room temperature ferromagnetism and quantum dot materials, which is applied in the field of non-toxic dilute magnetic quantum dot materials and its preparation, can solve the problems of containing Cd and not having room temperature ferromagnetism, and achieves convenient raw material supply, simple equipment, and low raw material prices Effect

Active Publication Date: 2016-03-09
SOUTHEAST UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a non-toxic diluted magnetic quantum dot material with both fluorescence and room temperature ferromagnetism and its preparation method to solve the problem that traditional diluted magnetic quantum dots contain Cd and most of them do not have room temperature ferromagnetism

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  • Nontoxic diluted-magnetic quantum dot material with fluorescence and room temperature ferromagnetism, and preparation method thereof
  • Nontoxic diluted-magnetic quantum dot material with fluorescence and room temperature ferromagnetism, and preparation method thereof
  • Nontoxic diluted-magnetic quantum dot material with fluorescence and room temperature ferromagnetism, and preparation method thereof

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Embodiment

[0032] CuI used in this embodiment, Co(OAc) 2 , Zn(OAc) 2 , In(OAc) 3 Powder and other raw materials are analytical reagents, the solvent and ligand are the DDT solution of n-dodecanethiol, and the glass instruments used are rinsed with deionized water three times before use and then vacuum-dried.

[0033] Preparation of 2% Co-doped Co:CuInS with Fluorescent and Room-Temperature Ferromagnetism Encapsulated 3-layer ZnS 2 ZnS quantum dots, comprising the steps of:

[0034] (1) Co:CuInS with ferromagnetism 2 Nuclei: Add Co to 12 mL of n-dodecanethiol in DDT under nitrogen atmosphere 2+ (0.01mmol), Cu + (0.2mmol) , In 3+ (0.2mmol), then heated to 200°C, and then kept at 200°C for 90Min, and finally removed from the heat source and cooled to room temperature at room temperature for ZnS coating;

[0035] (2) ZnS cladding: Add 1 mmol of Zn precursor to Co:CuInS at room temperature 2 In the nuclear solution, the temperature was then raised to 230°C, and then kept at this temp...

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Abstract

The invention discloses a nontoxic diluted-magnetic quantum dot material with fluorescence and room temperature ferromagnetism, and a preparation method thereof. The quantum dot material is Co: CuInS2 coated by two to four layers of a ZnS shell and has a structural formula of Co: CuInS2@ZnS, wherein Co exists in quantum dots in the form of ions. The preparation method comprises the following steps: (1) preparation of a Co: CuInS2 core with room temperature ferromagnetism; and (2) injecting a Zn source at room temperature and wrapping the core with a proper thickness of the ZnS shell layers. The preparation method adopts a single-pot thermal decomposition process, is simple in process, easy to operate, convenient in raw material supply and cheap in raw materials, can be completed in a common chemical laboratory and is easy to promote.

Description

technical field [0001] The invention belongs to the field of quantum dot luminescent materials, in particular to a non-toxic dilute magnetic quantum dot material with both fluorescence and room temperature ferromagnetism and a preparation method thereof. Background technique [0002] Diluted magnetic quantum dots are made by combining magnetic ions with quantum dots to make them have optical and magnetic properties. These properties can be used to prepare spin devices, and in order to make spin devices usable at room temperature, the prepared dilute magnetic quantum dots need to meet a strict condition that they have ferromagnetism at room temperature. There are two problems in the traditional preparation of dilute magnetic quantum, one is based on toxic heavy metals such as Cd, and the other is that most of them cannot achieve room temperature ferromagnetism. Therefore, it is particularly important to prepare Cd-free and room-temperature ferromagnetic dilute magnetic quant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/60H01F1/055
CPCC09K11/025C09K11/623H01F1/0552
Inventor 王春雷申进徐淑宏崔一平
Owner SOUTHEAST UNIV
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