Nothing Special   »   [go: up one dir, main page]

CN116199208A - Preparation of conductive nano carbon sphere and calibration application of conductive nano carbon sphere in scanning electron microscope - Google Patents

Preparation of conductive nano carbon sphere and calibration application of conductive nano carbon sphere in scanning electron microscope Download PDF

Info

Publication number
CN116199208A
CN116199208A CN202310192306.0A CN202310192306A CN116199208A CN 116199208 A CN116199208 A CN 116199208A CN 202310192306 A CN202310192306 A CN 202310192306A CN 116199208 A CN116199208 A CN 116199208A
Authority
CN
China
Prior art keywords
nano carbon
preparation
conductive nano
silicon dioxide
conductive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310192306.0A
Other languages
Chinese (zh)
Inventor
魏强
于海洋
王曼璐
郝丽英
张平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan University
Original Assignee
Sichuan University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sichuan University filed Critical Sichuan University
Priority to CN202310192306.0A priority Critical patent/CN116199208A/en
Publication of CN116199208A publication Critical patent/CN116199208A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/15Nano-sized carbon materials
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00Manufacture or treatment of nanostructures
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/26Electron or ion microscopes; Electron or ion diffraction tubes
    • H01J37/28Electron or ion microscopes; Electron or ion diffraction tubes with scanning beams
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Silicon Compounds (AREA)

Abstract

The invention discloses a preparation method of a conductive nano carbon sphere and a calibration application of the conductive nano carbon sphere in a scanning electron microscope. The patent of the invention comprises the following steps: firstly, a preparation method of the conductive nano carbon sphere is provided, and secondly, the application of the conductive nano carbon sphere in the aspect of scanning electron microscope calibration is provided. The invention discloses a method for preparing conductive nano carbon spheres by using oxidation-self polymerization of dopamine to form a compact polydopamine layer on the surface of prepared spherical silicon dioxide and adopting a subsequent heat treatment mode. The preparation steps are simple, the cost is low, the repeated stability is good, and the large-scale batch preparation on the laboratory level can be realized. In addition, the prepared nano carbon spheres have good conductivity and uniform spherical particle size distribution, and can maintain high-resolution imaging under the bombardment of high vacuum and strong electron beams. Can be used for laboratory calibration of scanning electron microscope under low, medium and high magnification and acceleration voltage.

Description

Preparation of conductive nano carbon sphere and calibration application of conductive nano carbon sphere in scanning electron microscope
Technical Field
The invention relates to the technical field of nanocomposite preparation, in particular to a coated conductive nanosphere, and relates to preparation of a conductive carbon nanosphere and calibration application of the conductive carbon nanosphere in a scanning electron microscope.
Background
The scanning electron microscope has the advantages of continuously adjustable magnification, high shooting resolution, ultra-large depth of field and the like, and has wide application in the fields of life science, material science, microelectronics science and the like. Since a scanning electron microscope performs progressive scanning by using an electron beam at the time of photographing, problems such as image magnification and image distortion occur over time. Only if the stable resolution and good imaging effect are maintained, the most accurate scientific image and measurement data can be provided, and the standard sample is required to be used for calibrating performance indexes such as resolution, imaging quality and the like regularly. The currently marketed calibration standards mainly comprise gold nano-standards, carbon-based gold standard, copper grid standard and carbon-based tin ball (SnO 2) standard, most of which are expensive, have harsh storage conditions and are not easy to prepare in a large scale in a laboratory. Therefore, it is important to design and synthesize a nano standard sample with the same calibration effect, low cost, easy obtaining and easy preservation on the laboratory level.
Disclosure of Invention
The invention provides a preparation method of a conductive nano carbon sphere which can be realized on the laboratory level and a calibration application in a scanning electron microscope, aiming at solving the problems of high price and difficult preservation of the existing calibration standard sample sold in the market of the scanning electron microscope. The method has the advantages of low preparation cost and good repeated stability, and the prepared nano carbon spheres have good conductivity and uniform particle size distribution and are suitable for calibrating the scanning electron microscope under different shooting conditions.
The invention provides a technical scheme that: a method of preparing a conductive nanocarbon sphere, the method comprising:
s1, providing spherical nano silicon dioxide;
s2, forming a polydopamine compact layer on the surface of the spherical silicon dioxide;
and S3, performing heat treatment on the polydopamine compact layer to obtain the conductive nano carbon spheres.
Preferably, in step S1, the specific preparation method is as follows: weighing 1-4ml of 25% ammonia water, 12-48ml of 99.5% absolute ethyl alcohol and 80-100ml of deionized water, vigorously stirring for 20-40min, dropwise adding 1-3ml tetraethoxysilane, and continuously vigorously stirring for 15-45min.
Preferably, in step S2, the specific preparation method is as follows: adding 50mg/ml dopamine hydrochloride 6-12ml into the spherical nano silicon dioxide solution prepared in the step S1 for self-polymerization for 12-36 hours to obtain brown mixed solution, washing with deionized water to be neutral, and carrying out suction filtration to obtain a brown black solid, namely the spherical nano silicon dioxide coated with polydopamine.
Preferably, in step S3, the conductive nanocarbon balls are obtained by high temperature-cracking under an inert gas atmosphere, wherein the inert gas may be selected from nitrogen, argon, and helium; the preparation method comprises the following steps: drying the spherical nano silicon dioxide coated with polydopamine obtained in the step S2 in an oven at 80 ℃ for 12 hours, carbonizing the spherical nano silicon dioxide by using a tube furnace with temperature programming under the protection of nitrogen atmosphere, heating at a speed of 5-10 ℃/min, heating at a temperature of 700-900 ℃ for 120-240min, and finally grinding to obtain the conductive nano carbon spheres.
The invention provides another technical scheme that: any of the conductive nanocarbon balls described above is applied to scanning electron microscope calibration.
The beneficial effects of the invention are as follows:
(1) The synthesis thought of the conductive carbon coated silica nanospheres is novel, polydopamine (PDA) has the property similar to mussels and barnacle adhesion proteins, can be adhered to the surfaces of almost all materials, forms a PDA layer on the silica surfaces by oxidation-self polymerization of dopamine, and then prepares the nanospheres through subsequent treatment. The method has the advantages of simple steps, low preparation cost and good repeated stability, and can realize large-scale preparation at the laboratory level.
(2) The prepared carbon-coated silica nanospheres have good conductivity and uniform spherical particle size distribution, can perform conventional calibration on a (environment) scanning electron microscope under the condition of no metal spraying, and can be recycled.
(3) Under high vacuum and strong electron beam bombardment, the carbon-coated silica nanosphere calibration standard sample can still keep higher resolution and good secondary electron yield, and can be used for calibration under different amplification factors (low, medium and high) and different acceleration voltages (low, medium and high).
Drawings
FIG. 1 is a graph showing the scanning electron microscope and the particle size statistics of the conductive nanocarbon ball in example 1;
FIG. 2 is a transmission electron microscope image of the conductive nanocarbon ball in example 1;
FIG. 3 is an EDS spectrum of the conductive nanocarbon ball of application example 1;
fig. 4 is a calibration image of the conductive nanocarbon ball of application example 1 on a scanning electron microscope under different conditions (acceleration voltage 25kV, magnification 20000 times);
FIG. 5 is a graph of the conductive nanocarbon ball of application example 2 (acceleration voltage 25kV, magnification factor 8000) for calibrating a scanning electron microscope under different conditions;
fig. 6 is a calibration image of the conductive nanocarbon ball of application example 3 on a scanning electron microscope under different conditions (acceleration voltage 25kV, magnification 15000 times).
Detailed Description
The present invention is described in detail below with reference to specific embodiments, and it should be noted that the following embodiments are only for further description of the present invention and should not be construed as limiting the scope of the present invention, and some insubstantial modifications and adjustments of the present invention by those skilled in the art from the present disclosure are still within the scope of the present invention.
Example 1:
the embodiment provides a preparation method of a conductive nano carbon sphere, which comprises the following steps:
s1, providing spherical nano silicon dioxide;
s2, forming a polydopamine compact layer on the surface of the spherical silicon dioxide;
s3, conducting heat treatment on the polydopamine compact layer to obtain conductive nano carbon spheres;
in step S1, the silica is prepared by hydrolysis-condensation of tetraethoxysilane under alkaline conditions. The preparation method comprises the following steps: 1ml of 25% ammonia water, 12ml of 99.5% absolute ethanol and 80ml of deionized water are weighed, vigorously stirred for 20min, 1ml of tetraethoxysilane is added dropwise, and vigorously stirred for 15min.
In step S2, the dense polydopamine layer needs to be formed in an alkaline environment in step S1 by oxidation-polymerization of dopamine itself. The preparation method comprises the following steps: adding 50mg/ml dopamine hydrochloride 6ml into the spherical nano silicon dioxide solution prepared in the step S1 for self-polymerization for 12 hours to obtain brown mixed solution, and then washing with deionized water to neutrality and suction filtering to obtain brown black solid, namely polydopamine coated spherical nano silicon dioxide.
In the step S3, the conductive nanocarbon ball is obtained by high temperature-cracking under an inert gas atmosphere. The preparation method comprises the following steps: and (3) drying the spherical nano silicon dioxide coated with polydopamine obtained in the step (S2) in an oven at 80 ℃ for 12 hours, carbonizing the spherical nano silicon dioxide by using a tube furnace with temperature programming under the protection of nitrogen atmosphere, wherein the temperature increasing rate is 5 ℃/min, the temperature increasing is 700 ℃, the heat preservation time is 120min, and finally grinding to obtain the conductive nano carbon spheres. As shown in a scanning electron microscope in FIG. 1, the prepared conductive nano carbon spheres have good sphericity, smooth surface and relatively uniform dispersion; as shown in fig. 2, the outer surface of the silica was uniformly coated with a dense carbon layer.
Example 2:
the embodiment provides a preparation method of a conductive nano carbon sphere, which comprises the following steps:
s1, providing spherical nano silicon dioxide;
s2, forming a polydopamine compact layer on the surface of the spherical silicon dioxide;
s3, conducting heat treatment on the polydopamine compact layer to obtain conductive nano carbon spheres;
in step S1, the silica is prepared by hydrolysis-condensation of tetraethoxysilane under alkaline conditions. The preparation method comprises the following steps: 2ml of 25% ammonia water, 36ml of 99.5% absolute ethanol and 90ml of deionized water are measured, the mixture is vigorously stirred for 30min, 2ml of tetraethoxysilane is added dropwise, and the vigorous stirring is continued for 30min.
In step S2, the dense polydopamine layer needs to be formed in an alkaline environment in step S1 by oxidation-polymerization of dopamine itself. The preparation method comprises the following steps: adding 50mg/ml dopamine hydrochloride 10ml into the spherical nano silicon dioxide solution prepared in the step S1 for self-polymerization for 24 hours to obtain brown mixed solution, and then washing with deionized water to neutrality and suction filtering to obtain brown black solid, namely polydopamine coated spherical nano silicon dioxide.
In the step S3, the conductive nanocarbon ball is obtained by high temperature-cracking under an inert gas atmosphere. The preparation method comprises the following steps: and (3) drying the spherical nano silicon dioxide coated with polydopamine obtained in the step (S2) in an oven at 80 ℃ for 12 hours, carbonizing the spherical nano silicon dioxide by using a tube furnace with temperature programming under the protection of nitrogen atmosphere, wherein the temperature increasing rate is 8 ℃/min, the temperature increasing is 800 ℃, the heat preservation time is 180min, and finally grinding to obtain the conductive nano carbon spheres.
Example 3:
the embodiment provides a preparation method of a conductive nano carbon sphere, which comprises the following steps:
s1, providing spherical nano silicon dioxide;
s2, forming a polydopamine compact layer on the surface of the spherical silicon dioxide;
s3, conducting heat treatment on the polydopamine compact layer to obtain conductive nano carbon spheres;
in step S1, the silica is prepared by hydrolysis-condensation of tetraethoxysilane under alkaline conditions. The preparation method comprises the following steps: weighing 4ml of 25% ammonia water, 48ml of 99.5% absolute ethyl alcohol and 100ml of deionized water, vigorously stirring for 40min, dropwise adding 3ml of tetraethoxysilane, and continuously vigorously stirring for 45min.
In step S2, the dense polydopamine layer needs to be formed in an alkaline environment in step S1 by oxidation-polymerization of dopamine itself. The preparation method comprises the following steps: adding 12ml of dopamine hydrochloride with the concentration of 50mg/ml into the spherical nano silicon dioxide solution prepared in the step S1 for self-polymerization for 36 hours to obtain brown mixed solution, and then washing with deionized water to neutrality and suction filtering to obtain brown black solid, namely the spherical nano silicon dioxide coated with polydopamine.
In the step S3, the conductive nanocarbon ball is obtained by high temperature-cracking under an inert gas atmosphere. The preparation method comprises the following steps: and (3) drying the spherical nano silicon dioxide coated with polydopamine obtained in the step (S2) in an oven at 80 ℃ for 12 hours, carbonizing the spherical nano silicon dioxide by using a tube furnace with temperature programming under the protection of nitrogen atmosphere, wherein the temperature increasing rate is 10 ℃/min, the temperature increasing is 900 ℃, the heat preservation time is 240min, and finally grinding to obtain the conductive nano carbon spheres.
Application example 1:
the conductive carbon coated silica nanospheres prepared in example 1 were fixed on a sample-carrying stage of a (environmental) scanning electron microscope, and scanning photographic imaging calibration was directly performed without any metal spraying treatment. Shooting is carried out under the condition of accelerating voltage of 25kV and magnification of 20000 times (the size of a scale is 1 mu m), and the same area is selected for shooting in different time periods through the steps of focusing, adjusting contrast, brightness, eliminating astigmatism and the like, and 4 images are shot in each area. The imaging effect of the calibration standard sample is described as follows: (1) whether the image is clearly visible, (2) whether the sphere is deviated or distorted, and (3) whether the brightness and contrast of the image are moderate, and carrying out particle size statistics on the same nanospheres.
The EDS spectrum of fig. 3 shows that the photographed conductive carbon coated silica nanosphere calibration standard is composed of C, O, si elements, and that no characteristic peak of Au element remained after gold spraying appears, which is sufficient to prove that the prepared calibration standard is not subjected to gold spraying treatment. The scanned image of fig. 4 shows that at the high acceleration voltage and magnification described above, the obtained image is excellent in sharpness, moderate in contrast, moderate in brightness, free from distortion and lateral stripes due to poor conductivity. Meanwhile, the same nanospheres photographed in different time periods have smaller particle size statistical error ranges, and the prepared conductive carbon coated silica nanospheres are proved to have good calibration imaging level.
Application example 2:
the conductive carbon coated silica nanospheres prepared in example 1 were fixed on a sample-carrying stage of a (environmental) scanning electron microscope, and scanning photographic imaging calibration was directly performed without any metal spraying treatment. Shooting is carried out under the condition of accelerating voltage of 25kV and magnification factor of 8000 times (the size of a scale is 2 mu m), and the same area is selected for shooting in different time periods through the steps of focusing, adjusting contrast, brightness, eliminating astigmatism and the like, and 4 images are shot in each area. The imaging effect of the calibration standard sample is described as follows: (1) whether the image is clearly visible, (2) whether the sphere is deviated or distorted, and (3) whether the brightness and contrast of the image are moderate, and carrying out particle size statistics on the same nanospheres.
The scanned image of fig. 5 shows that at the high acceleration voltage and magnification described above, the obtained image is excellent in sharpness, moderate in contrast, moderate in brightness, free from distortion and lateral stripes due to poor conductivity. Meanwhile, the same nanospheres photographed in different time periods have smaller particle size statistical error ranges, and the prepared conductive carbon coated silica nanospheres are proved to have good calibration imaging level.
Application example 3:
the conductive carbon coated silica nanospheres prepared in example 1 were fixed on a sample-carrying stage of a (environmental) scanning electron microscope, and scanning photographic imaging calibration was directly performed without any metal spraying treatment. Shooting is carried out under the condition of accelerating voltage of 25kV and magnification factor of 15000 times (the size of a scale is 1 mu m), and the same area is selected for shooting in different time periods through the steps of focusing, adjusting contrast, brightness, eliminating astigmatism and the like, and 4 images are shot in each area. The imaging effect of the calibration standard sample is described as follows: (1) whether the image is clearly visible, (2) whether the sphere is deviated or distorted, and (3) whether the brightness and contrast of the image are moderate, and carrying out particle size statistics on the same nanospheres.
The scanned image of fig. 6 shows that at the high acceleration voltage and magnification described above, the obtained image is excellent in sharpness, moderate in contrast, moderate in brightness, free from distortion and lateral stripes due to poor conductivity. Meanwhile, the same nanospheres photographed in different time periods have smaller particle size statistical error ranges, and the prepared conductive carbon coated silica nanospheres are proved to have good calibration imaging level.
The above-described embodiments are provided to illustrate the gist of the present invention, but are not intended to limit the scope of the present invention. It will be understood by those skilled in the art that various modifications and equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.

Claims (5)

1. A preparation method of a conductive nano carbon sphere is characterized in that: the method comprises the following steps:
s1, providing spherical nano silicon dioxide;
s2, forming a polydopamine compact layer on the surface of the spherical silicon dioxide;
and S3, performing heat treatment on the polydopamine compact layer to obtain the conductive nano carbon spheres.
2. The method of manufacturing according to claim 1, wherein: in step S1, the specific preparation method is as follows: weighing 1-4ml of 25% ammonia water, 12-48ml of 99.5% absolute ethyl alcohol and 80-100ml of deionized water, vigorously stirring for 20-40min, dropwise adding 1-3ml tetraethoxysilane, and continuously vigorously stirring for 15-45min.
3. The method of manufacturing according to claim 1, wherein: in step S2, the specific preparation method is as follows: adding 50mg/ml dopamine hydrochloride 6-12ml into the spherical nano silicon dioxide solution prepared in the step S1 for self-polymerization for 12-36 hours to obtain brown mixed solution, washing with deionized water to be neutral, and carrying out suction filtration to obtain a brown black solid, namely the spherical nano silicon dioxide coated with polydopamine.
4. The method of manufacturing according to claim 1, wherein: in step S3, the conductive carbon nanospheres are required to be obtained by high-temperature pyrolysis under the atmosphere of inert gas, wherein the inert gas can be selected from nitrogen, argon and helium; the preparation method comprises the following steps: drying the spherical nano silicon dioxide coated with polydopamine obtained in the step S2 in an oven at 80 ℃ for 12 hours, carbonizing the spherical nano silicon dioxide by using a tube furnace with temperature programming under the protection of nitrogen atmosphere, heating at a speed of 5-10 ℃/min, heating at a temperature of 700-900 ℃ for 120-240min, and finally grinding to obtain the conductive nano carbon spheres.
5. Use of the conductive nanocarbon sphere of any of claims 1-4 for scanning electron microscope calibration.
CN202310192306.0A 2023-03-02 2023-03-02 Preparation of conductive nano carbon sphere and calibration application of conductive nano carbon sphere in scanning electron microscope Pending CN116199208A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310192306.0A CN116199208A (en) 2023-03-02 2023-03-02 Preparation of conductive nano carbon sphere and calibration application of conductive nano carbon sphere in scanning electron microscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310192306.0A CN116199208A (en) 2023-03-02 2023-03-02 Preparation of conductive nano carbon sphere and calibration application of conductive nano carbon sphere in scanning electron microscope

Publications (1)

Publication Number Publication Date
CN116199208A true CN116199208A (en) 2023-06-02

Family

ID=86510956

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310192306.0A Pending CN116199208A (en) 2023-03-02 2023-03-02 Preparation of conductive nano carbon sphere and calibration application of conductive nano carbon sphere in scanning electron microscope

Country Status (1)

Country Link
CN (1) CN116199208A (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015101450A1 (en) * 2014-02-05 2015-08-06 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Sulfur-based active material for a positive electrode
CN105502342A (en) * 2016-01-07 2016-04-20 上海工程技术大学 Method for preparing nanometer hollow carbon spheres with dopamine serving as carbon source
CN106477586A (en) * 2016-10-14 2017-03-08 北京海岸鸿蒙标准物质技术有限责任公司 For calibrating nano particle size standard substance of granulometry and preparation method thereof
CN106822896A (en) * 2017-02-14 2017-06-13 扬州大学 A kind of hollow Nano carbon balls of N doping load the preparation method of extra small golden nanometer particle material
CN106941164A (en) * 2017-04-11 2017-07-11 东南大学 A kind of preparation method of lithium ion battery negative nucleocapsid clad structure material
CN109085191A (en) * 2018-07-06 2018-12-25 四川大学 A kind of carbon-based SnO2The preparation method of micro-nano ball and its application in terms of scanning electron microscope calibration
CN110280290A (en) * 2019-07-08 2019-09-27 华南理工大学 One kind having flower-shaped type nitrogen-doped carbon-spinel-type microspherical catalyst of high-specific surface area and the preparation method and application thereof
CN110527494A (en) * 2019-07-04 2019-12-03 浙江海洋大学 A kind of preparation method of the mesoporous compound organic phase change material of silicon substrate high thermal conductivity
CN111381022A (en) * 2018-12-29 2020-07-07 苏州海狸生物医学工程有限公司 Enrichment method of magnetic microspheres for myocardial injury and kidney injury serum markers
CN115236109A (en) * 2022-08-03 2022-10-25 中国科学院地质与地球物理研究所 Method for determining whole rock composition of small-size sample based on big data analysis
CN115477374A (en) * 2022-07-21 2022-12-16 贵州大学 MoO (MoO) 2 Preparation and application methods of @ NHCS hollow structure material

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015101450A1 (en) * 2014-02-05 2015-08-06 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Sulfur-based active material for a positive electrode
CN105502342A (en) * 2016-01-07 2016-04-20 上海工程技术大学 Method for preparing nanometer hollow carbon spheres with dopamine serving as carbon source
CN106477586A (en) * 2016-10-14 2017-03-08 北京海岸鸿蒙标准物质技术有限责任公司 For calibrating nano particle size standard substance of granulometry and preparation method thereof
CN106822896A (en) * 2017-02-14 2017-06-13 扬州大学 A kind of hollow Nano carbon balls of N doping load the preparation method of extra small golden nanometer particle material
CN106941164A (en) * 2017-04-11 2017-07-11 东南大学 A kind of preparation method of lithium ion battery negative nucleocapsid clad structure material
CN109085191A (en) * 2018-07-06 2018-12-25 四川大学 A kind of carbon-based SnO2The preparation method of micro-nano ball and its application in terms of scanning electron microscope calibration
CN111381022A (en) * 2018-12-29 2020-07-07 苏州海狸生物医学工程有限公司 Enrichment method of magnetic microspheres for myocardial injury and kidney injury serum markers
CN110527494A (en) * 2019-07-04 2019-12-03 浙江海洋大学 A kind of preparation method of the mesoporous compound organic phase change material of silicon substrate high thermal conductivity
CN110280290A (en) * 2019-07-08 2019-09-27 华南理工大学 One kind having flower-shaped type nitrogen-doped carbon-spinel-type microspherical catalyst of high-specific surface area and the preparation method and application thereof
CN115477374A (en) * 2022-07-21 2022-12-16 贵州大学 MoO (MoO) 2 Preparation and application methods of @ NHCS hollow structure material
CN115236109A (en) * 2022-08-03 2022-10-25 中国科学院地质与地球物理研究所 Method for determining whole rock composition of small-size sample based on big data analysis

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
AN, WL ET AL: ""Mesoporous hollow nanospheres consisting of carbon coated silica nanoparticles for robust lithium-ion battery anodes"", 《JOURNAL OF POWER SOURCES》, vol. 345, 10 February 2017 (2017-02-10), pages 227 - 236, XP029929697, DOI: 10.1016/j.jpowsour.2017.01.125 *
刘向春 等主编,: "《材料现代研究与测试技术》", 30 June 2022, 中国建材工业出版社, pages: 242 *
李海燕;徐颖;: "热重-差热联用仪的特点和维护", 分析仪器, no. 06, 28 November 2011 (2011-11-28), pages 83 - 86 *
盛克平 等: ""SEM及AFM校准放大倍率标样的研究"", 《电子显微学报》, vol. 2003, no. 05, 25 October 2003 (2003-10-25), pages 438 - 442 *

Similar Documents

Publication Publication Date Title
CN112614608B (en) Low-temperature co-fired ceramic inner conductive silver paste and preparation method thereof
CN109666451A (en) A method of absorbing material is prepared using biomass carbon source
CN110436894B (en) Low-dielectric-constant LTCC material and preparation method thereof
CN116199208A (en) Preparation of conductive nano carbon sphere and calibration application of conductive nano carbon sphere in scanning electron microscope
CN108359452B (en) Water-soluble graphene-like quantum dot and preparation method and application thereof
CN109592668B (en) Method for controlling diameter of carbon nano tube
CN113189162A (en) Electrochemical luminescence method based on perovskite @ covalent organic framework composite material
Sima et al. Self‐Reporting Microsensors Inspired by Noctiluca Scintillans for Small‐Defect Positioning and Electrical‐Stress Visualization in Polymers
Thornhill et al. Examining three-dimensional microstructures with the scanning electron microscope
JP4970836B2 (en) Method for stabilizing ceramic powders and slurries by introducing chemical working groups
CN113480897B (en) Bi-component pressure sensitive coating suitable for steady-state pressure measurement and data processing method thereof
JP2002356630A (en) Copper powder for low-temperature baking or conductive paste
CN112851332A (en) Method for preparing high-voltage gradient zinc oxide piezoresistor by doping coating method
CN113214638A (en) Wave-absorbing heat-conducting flexible composite material and preparation method thereof
CN112480579A (en) Low-dielectric-constant low-loss low-thermal-expansion-coefficient PTFE-based circuit substrate and preparation method thereof
CN101546682B (en) Graphite nano-plate field emission material and method for preparing same
CN111599561B (en) Neodymium-iron-boron magnet and preparation method thereof
Wang et al. Bulk synthesis of conductive non-metallic carbon nanospheres and a 3D printed carrier device for scanning electron microscope calibration
CN114388789B (en) Soft and hard composite carbon and preparation method and application thereof
JP2005179184A (en) Silica sol and process for preparing the same
CN108807988B (en) Preparation method of spherical lithium ferrous silicate cathode material for lithium ion battery
CN109246337B (en) Wafer-level lens module
CN109971243B (en) Ink for wave-absorbing coating, wave-absorbing coating material and preparation method thereof
CN117939865A (en) Electromagnetic wave absorbing material with high heat conduction
CN114574095A (en) Nano ceramic coating and use method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination