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GB/T 26826-2011: Measurement for diameter of carbon nanotubes
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Measurement for diameter of carbon nanotubes
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GB/T 26826-2011
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Basic data | Standard ID | GB/T 26826-2011 (GB/T26826-2011) | | Description (Translated English) | Measurement for diameter of carbon nanotubes | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | G13 | | Classification of International Standard | 59.100.20 | | Word Count Estimation | 10,151 | | Date of Issue | 2011-07-29 | | Date of Implementation | 2011-12-01 | | Quoted Standard | GB/T 5314 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 12 of 2011 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the measurement of carbon nanotubes (CNTs) in diameter principles, instruments, sample preparation and preservation, methods of measurement, image analysis, calculation results, the typical sample measurement examples. This standard applies to transmission electron microscopy (TEM) and TEM image analysis technique to measure the diameter of carbon nanotubes. | GB/T 26826-2011: Measurement for diameter of carbon nanotubes---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Measurement for diameter of carbon nanotubes
ICS 59.100.20
G13
National Standards of People's Republic of China
Methods of measurement of the diameter of carbon nanotubes
Issued on. 2011-07-29
2011-12-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
Please note that some of the content of this document may involve patents. Distribution of this document
Institutions do not assume the responsibility to identify these patents.
This standard by the National Standardization Committee Nanotechnology Materials Technical Committee (SAC/TC279/SC1) and focal points.
This standard was drafted. Tsinghua University, Chennai days Technology Co., Ltd., Metallurgical Industry Information Standards Institute.
The main drafters of this standard. Wang Yao, Ningguo Qing, Wei Fei, Luan Yan, Wen Qian, Huang Jiaqi.
Methods of measurement of the diameter of carbon nanotubes
1 Scope
This standard specifies the preparation and preservation of measuring carbon nanotubes (CNTs) in diameter principles, instruments, samples, measurements, image analysis,
Result of the calculation, measurement, etc. Typical examples of the sample.
This standard applies to the use of transmission electron microscopy (TEM) and TEM image analysis techniques to measure the diameter of carbon nanotubes.
This standard does not apply to changes in diameter bamboo-like carbon nanotubes and other significant sample.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 5314 powder metallurgy sampling method (ISO 3954. 1977, EQV)
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Nanotubes carbonnanotubes, CNTs
Nano-carbon material having a tubular structure, according to the number of layers of carbon atoms, the wall can be divided into single-walled carbon nanotubes (single wall of carbon atoms),
Double-walled carbon nanotubes (wall into two layers of carbon atoms) and multi-walled carbon nanotubes (wall of three or more carbon atoms).
NOTE. The standard of the carbon nanotubes include single-walled carbon nanotubes, double-walled carbon nanotubes and multi-walled carbon nanotubes.
3.2
Carbon nanotube diameter diameterofcarbonnanotubes
Carbon nanotubes perpendicular to the axial direction of the diameter of the circular section, including inner and outer diameters. Bore-sectional diameter of the inner circle of the graphite layer is formed;
It refers to the outer diameter of the circular cross-section the diameter of the outer graphite layer.
3.3
Effective field validvisualfield
Ratio of the number of carbon nanotubes TEM root diameter of the field of view can be identified in over 80% of the predetermined field of view.
Method 4
4.1 General
The method of transmission electron microscope, quantitative measurement of the diameter of carbon nanotubes. Transmission electron microscope capable of carbon nanotube sample image to enlarge
To dozens of times, even hundreds of times, the point resolution of better than 0.3nm, can clearly reflect the morphology and microstructure of carbon nanotubes samples to
It took advantage of its image statistics measure the diameter of carbon nanotubes.
The basic steps in this method are. First, the sample is dispersed carbon nanotubes placed on a transmission electron microscope and a dedicated micro-grid correctly
Save; secondly, the carbon nanotubes was observed by transmission electron microscopy of a hollow structure, to obtain effective field TEM image of a certain amount; Ran
After all valid field by image analysis of the same sample of carbon nanotubes, the carbon nanotubes measured and statistical sample diameter; and finally, drawing carbon
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