Fluorescent carbon dot narrow in full width at half maximum and preparation method and application thereof

A technology of fluorescent carbon dots and full width at half maximum is applied in the field of preparation of narrow half width fluorescent carbon dots, which can solve the problems of expensive raw materials, low output, complicated processes and the like, and achieve the effect of improving resolution.

Inactive Publication Date: 2016-05-25
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these preparation methods usually have complex processes, expensive raw materials, and low yields. Therefore, it is extr...

Method used

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  • Fluorescent carbon dot narrow in full width at half maximum and preparation method and application thereof
  • Fluorescent carbon dot narrow in full width at half maximum and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1 Measure 100ml of distilled water as the electrolyte.

[0033] 2 Two high-purity graphite rods (10 cm in length and 0.5 cm in diameter) were ultrasonically cleaned in alcohol and distilled water for 30 minutes. The cleaned graphite rod is vertically inserted into the electrolyte solution described in step 1, with a fixed distance of 2 cm.

[0034] 3 Use a DC stabilized power supply for power supply, and a voltage of 60V is applied to the electrodes described in step 2.

[0035] 4. Filter the obtained dark brown liquid, then centrifuge at 10,000 r / min for 10 min to remove large particles visible to the naked eye to obtain an aqueous solution containing carbon dots.

[0036] 5 Characterization of carbon dots: use a fluorescence spectrophotometer to obtain photoluminescence (PL) spectra at different excitation wavelengths (320-440nm, step size 20nm); drop the carbon dot solution on a copper grid with a carbon support film, bake Dry-take TEM images such as figure 1 show...

Embodiment 2

[0038] 1 Measure 100ml of distilled water as the electrolyte.

[0039]2 Two high-purity graphite rods (10 cm in length and 0.5 cm in diameter) were ultrasonically cleaned in alcohol and distilled water for 30 minutes. The cleaned graphite rod is vertically inserted into the electrolyte solution described in step 1, with a fixed distance of 2 cm.

[0040] 3 Use a three-electrode system, place the reference electrode between the working electrode and the counter electrode, record the changes in electrical parameters, and study the impact of changes in electrical parameters on the product.

[0041] 4 Use a DC stabilized power supply for power supply, and apply a voltage of 60V to the electrodes described in step 2.

[0042] 5. Filter the obtained dark brown liquid, and then centrifuge at 10,000 rpm for 10 min to remove large particles visible to the naked eye to obtain an aqueous solution containing carbon dots.

[0043] 6 Characterization of carbon dots: use a fluorescence spe...

Embodiment 3

[0045] 1 Measure 100ml of distilled water as the electrolyte.

[0046] 2 A high-purity graphite rod (10 cm long, 0.5 cm in diameter), ultrasonically cleaned in alcohol and distilled water for 30 minutes. Use a platinum wire as the counter electrode, and insert the cleaned graphite rod as the working electrode vertically into the electrolyte solution described in step 1, with a fixed distance of 2 cm.

[0047] 3 Use a DC stabilized power supply for power supply, and a voltage of 60V is applied to the electrodes described in step 2.

[0048] 4. Filter the obtained dark brown liquid, and then centrifuge at 10,000 rpm for 10 min to remove large particles visible to the naked eye to obtain an aqueous solution containing carbon dots.

[0049] 5 Characterization of carbon dots: use a fluorescence spectrophotometer to obtain photoluminescence (PL) spectra at different excitation wavelengths (340-440nm, step size 20nm); drop the carbon dot solution on a copper grid with a carbon suppo...

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PUM

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Abstract

The invention discloses a fluorescent carbon dot narrow in full width at half maximum and a preparation method and application thereof. An electrochemical method is adopted, water is used as electrolyte, a graphite rod serves as a working electrode, the voltage is applied, and the graphite rod is peeled, so that the carbon dot is prepared and obtained. The fluorescence peak of the carbon dot is extremely narrow in full width at half maximum and is merely about 10 nm, monochromaticity is excellent, and the carbon dot plays an important role in improving bioimaging quality. In addition, the method further has the remarkable advantages that materials are low in price and easy to obtain, the fabrication process is simple and easy to control, and the electrolyte is singular and free of pollution, so that the preparation method is an environment-friendly preparation method which can be applied to large-scale production.

Description

technical field [0001] The invention relates to the fields of chemistry and luminescent material science, in particular to a method for preparing fluorescent carbon dots with narrow half-width. Background technique [0002] Carbon dots are quasi-spherical carbon nanoparticles discovered in 2006 with carbon as the skeleton and generally less than 10nm in diameter. , basically does not damage cells, especially has unique advantages and important applications in in vivo biomarkers and bioimaging, and is considered to be the most likely biomarker material to replace traditional quantum dots [Y.P.Sun, B.Zhou, Y.Lin, W .Wang, K.A.S.Fernando, P.Pathak, M.J.Meziani, B.A.Harruff, X.Wang, H.F.Wang, P.J.G.Luo, H.Yang, M.E.Kose, B.L.Chen, L.M.Veca, S.Y.Xie, JAmChemSoc, 128 (2006) 7756- 7757; L.Cao, X.Wang, M.J.Meziani, F.S.Lu, H.F.Wang, P.J.G.Luo, Y.Lin, B.A.Harruff, L.M.Veca, D.Murray, S.Y.Xie, Y.P.Sun, JAmChemSoc, 129 (2007) 11318- 11324; C.Q.Ding, A.W.Zhu, Y.Tian, ​​Accounts ChemRe...

Claims

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Application Information

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IPC IPC(8): C09K11/65C01B31/02B82Y20/00B82Y40/00
CPCC09K11/65
Inventor 赵志伟李雪华
Owner SOUTHEAST UNIV
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