ZnxCd1-xTe fluorescent nano-bar and aqueous phase synthesis method thereof

A technology of fluorescent nanometer and nanorod, which is applied in the fields of biology and optical electronic devices, can solve the problems of ternary Zn that cannot be obtained in rod-like structure, and achieve the effects of excellent optical and electrical properties, low toxicity and stable products

Inactive Publication Date: 2011-09-14
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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Problems solved by technology

[0006] None of the above methods can obtain ternary Zn with one-dimensional rod-like structure. x Cd 1-x Te fluorescent nanocrystals
Similarly, there is no report on the preparation of rod-shaped Zn in aqueous phase. x Cd 1-x Te nanocrystal method

Method used

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  • ZnxCd1-xTe fluorescent nano-bar and aqueous phase synthesis method thereof
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  • ZnxCd1-xTe fluorescent nano-bar and aqueous phase synthesis method thereof

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Embodiment 1

[0033] In this embodiment, Zn is synthesized under the water phase through five steps from a to e x Cd 1-x Te fluorescent nanorods. Wherein, a: Dissolve 0.06g of sodium borohydride in 25ml of water, pass nitrogen gas to remove oxygen for half an hour under the condition of an ice-water bath, add 0.1g of tellurium powder, and continue the reaction under the protection of an inert gas to prepare a sodium telluride hydride solution; b: 0.292g Cd(CH 3 COO) 2 .2H 2 O and 0.103gZn(CH 3 COO) 2 .2H 2 O is dissolved in water according to the molar ratio of Cd to Zn of 7:3, and filled with an inert gas in a water bath at 60-70°C for half an hour to remove the dissolved oxygen in the mixture; c: obtained in step b under magnetic stirring and nitrogen protection Add 0.13ml of thioglycolic acid and 0.228g of L-cysteine ​​as stabilizers to the solution, add dropwise 1M NaOH solution to adjust the pH of the solution to 9; d: combine the sodium telluride hydride solution in step a with...

Embodiment 2

[0035] The rest of the synthesis steps are the same as in Example 1; the difference is that the reflux reaction time in step d is 60min. The TEM characterization diagram of the product is shown in figure 2 , whose fluorescence spectrum is shown in Figure 4 .

Embodiment 3

[0037] The rest of the synthesis steps are the same as in Example 1; the difference is that the reflux reaction time in step d is 120min. The TEM characterization diagram of the product is shown in image 3 , whose fluorescence spectrum is shown in Figure 4 .

[0038] From Figure 1 to Figure 3 It can be seen from the sample transmission electron microscope photo that the present invention synthesizes rod-shaped alloy type Zn in the water phase at a low temperature of 75°C x Cd 1-x Te fluorescent nanocrystals, and nanorods of different sizes can be obtained with different reaction times. When the reaction is 30min-120min, the length of the nanorods can be controlled at 30-200nm, and the diameter can be controlled at 20-50nm. in addition, Figure 1 to Figure 3 The morphology of the samples obtained in is all rod-like, indicating that the samples prepared by this method can effectively control the morphology.

[0039] From Figure 4 It can be seen from the fluorescence s...

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Abstract

The invention relates to a ZnxCd1-xTe fluorescent nano-bar and an aqueous phase synthesis method thereof. The ZnxCd1-xTe fluorescent nano-bar is bar-shaped under transmission electron microscopy(TEM), and has the length of 20 to 300nm and the diameter of 10 to 80nm, wherein x is more than 0 and less than 1; and the nano-bar is mainly applied in the fields of biology, medical science and optoelectronic devices, for example, the nano-bar is used as a fluorescent probe in fluorometry, and the optical characteristics of the nano-bar are obviously higher than those of organic dyestuffs. The invention also provides an aqueous phase synthesis method for the ZnxCd1-xTe fluorescent nano-bar. In the method, dual stabilizers of thioglycollic acid and L-cysteine are introduced into aqueous solution containing inorganic salts of Zn and Cd, and the bar-shaped alloy-type ZnxCd1-xTe fluorescent nano-crystal is synthesized in the aqueous phase for the first time by regulating parameters related to the reaction.

Description

technical field [0001] The present invention relates to a kind of Zn x Cd 1-x Te fluorescent nanorods are mainly used in the fields of biology and optical electronic devices. The invention also relates to the aqueous phase synthesis method of the fluorescent nanorod. Background technique [0002] Due to the unique optical properties of fluorescent nanocrystals, the potential application value in biology, medicine, optoelectronic devices and other fields has attracted great attention of scientists. Nanocrystals are used as fluorescent probes in fluorescence analysis, and their optical properties are significantly better than those of commonly used organic dyes. In particular, nanocrystals with one-dimensional structures include nanowires, nanorods, nanotubes, and nanoribbons, which not only have special properties such as small size effects, surface effects, quantum size effects, and macroscopic quantum tunneling effects, but also have nanostructure combinations. The resu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/46C30B27/00C09K11/88
Inventor 王琰崔海信姜建芳孙长娇
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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