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Amphipathy carbon quantum dot and preparation method thereof

A carbon quantum dot and amphiphilic technology, which is used in the preparation and application of nanomaterials, can solve problems such as poor results, and achieve the effects of easy penetration, good biocompatibility, and excellent fluorescence properties.

Active Publication Date: 2015-07-22
ANHUI UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, single hydrophilic or hydrophobic carbon quantum dots are not effective when applied to the fluorescence imaging of biological cells.

Method used

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  • Amphipathy carbon quantum dot and preparation method thereof
  • Amphipathy carbon quantum dot and preparation method thereof
  • Amphipathy carbon quantum dot and preparation method thereof

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Embodiment 1

[0042] (1) Weigh 0.5 gram of chili powder in a crucible (5 milliliters), put it into a box-type resistance furnace, and roast it for 90 minutes at 400 degrees Celsius, and the heating rate is 5 degrees Celsius per minute, and the black sample after roasting is ground into powder;

[0043] (2) Add 10 milliliters of absolute ethanol to the black powder obtained above, ultrasonically for 30 minutes, let stand, get the supernatant for suction filtration, adopt a microporous filter membrane with a pore size of 0.22 microns during suction filtration, collect the filtrate and repeat Suction filtration 3 times, and the filtrate was dried in a blast dryer at 50 degrees Celsius to obtain light yellow powder A;

[0044] (3) Add 10 milliliters of ultrapure water to the light yellow powder A prepared above, ultrasonically disperse, filter through a microporous membrane, collect the filtrate, and freeze-dry with a freeze dryer to obtain light yellow powder B;

[0045] (4) Add 10 milliliter...

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Abstract

The invention discloses am amphipathy carbon quantum dot and a preparation method thereof. The amphipathy carbon quantum dot is prepared by virtue of the following steps: carrying out pyrolysis on chili powder which is adopted as a carbon source in an air atmosphere, and then carrying out the extraction and purification by virtue of ethanol. The particle size of the carbon quantum dot prepared in the method is 0.5nm to 4.5nm, and the surface of the carbon quantum dot is not only provided with hydrophilic groups such as hydroxyl, carboxyl, formyl groups and amino groups but also provided with hydrophobic groups such as methyl, methylene and phenyl, so the carbon quantum dot is amphipathic. The fluorescent quantum yield of the carbon quantum dot is 70 to 75 percent. The preparation method is simple to operate, and raw materials are low in price and easy to obtain and can be used for preparing the amphipathy carbon quantum dots in a large scale. Compared with other single hydrophilic and single hydrophobic carbon quantum dots, the prepared amphipathy carbon quantum dot is better in biological compatibility, the cell developing effect is better, and the amphipathy carbon quantum dot can be well applied to the fields such as biological developing, biological medical imaging and fluorescent detection.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of nanometer materials, and in particular relates to an amphiphilic carbon quantum dot and a preparation method thereof. Background technique [0002] Fluorescent carbon quantum dots are zero-dimensional carbon nanoparticles with an approximate spherical shape and a particle size of less than 10 nanometers. Due to their small particle size, they have similar photoluminescent properties to semiconductor quantum dots. [0003] After nearly ten years of research and development, carbon quantum dots have become one of the most popular carbon nanomaterials after fullerenes, carbon nanotubes and graphene. The discovery of carbon quantum dots makes up for some defects of traditional metal semiconductor quantum dots. It not only has excellent optical properties and small size characteristics, but also has low toxicity and good biocompatibility. It is easy to realize surface functionali...

Claims

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Application Information

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IPC IPC(8): C09K11/65C01B31/02G01N21/64B82Y20/00B82Y40/00
Inventor 毕红张翔
Owner ANHUI UNIVERSITY
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