GB/T 32869-2016Nanotechnologies -- Characterization of single-wall carbon nanotubes using scanning electron microscopy and energy dispersive X-ray spectrometry analysis (English PDF)

Foreword

This standard is drafted in accordance with the rules given in GB/T 1.1-2009.

This standard uses the translation method equivalent to the international standard ISO/T S10798..2011 "nano-technology single-walled carbon nanotubes scanning electron Microscopic and energy dispersive X - ray spectroscopy.

This standard is proposed by the Chinese Academy of Sciences.

This standard is under the national standard of nanotechnology standardization technical committee (SAC/TC279).

This standard is responsible for drafting units. National Center for Nanoscience.

Introduction

Single-walled carbon nanotubes (single-walcarbonnanotubes, referred to as SWCNTs) is a kind of carbon atoms by hexagonal grid the hollow tubular carbon material arranged in the form has ideal mechanical, thermal and electrical properties. Single-walled carbon nanotubes are in the range of 0.5nm ~ 3nm, length range from less than 1µm to millimeter.

Single-walled carbon nanotubes have a wide range of potential applications in composite reinforcements, drug delivery systems, and electronic devices. Single - walled carbon nanotubes can be in place in the electronic or electromechanical devices in situ growth, or by arc, laser, chemical vapor deposition method of mass production. About single wall the structure and preparation of carbon nanotubes can be found in Relevant References [11,12].

The preparation of single-walled carbon nanotubes usually requires the growth of metal nanoparticles as a catalyst, and the nanoparticles are retained in the synthetic Single-walled carbon nanotubes in crude products. The crude product may also contain other inorganic oxide impurities and different carbon nanostructures (such as fullerenes, carbon Nanocrystalline, amorphous carbon). Solvents, acids and other chemical reagents can be used to purify single-walled carbon nanotubes to reduce or remove impurities. Purification side the process includes acid oxidation [13], gas phase oxidation [14], microfiltration [15] and column chromatography [16]. Different purification methods have different effects on single-walled carbon nanotubes, Single-walled carbon nanotubes may become shorter, functionalized by the carboxylic acid groups, adhered into bundles, or damaged (the walls are defective and thus affect the material properties can).

High resolution scanning electron microscopy (highresolutionscanningelectronmicroscopy, referred to as HRSEM) is a very it is suitable for characterizing the properties of crude products and purified single-walled carbon nanotubes. Using high resolution scanning electron microscopy (highresolution (HRSEM) can characterize the aspect ratio of single-walled carbon nanotubes and distinguish carbon nanotubes (carbon nanotubes), referred to as CNTs). Based on scanning electron microscopy (scanning electron microscopy, referred to as SEM) energy dispersive X-ray spectrum (energydispersiveX-rayspectrometry, referred to as EDX) is used to determine the material in the catalytic and other inorganic impurities.

Scanning electrons of single - walled carbon nanotubes in nanotechnology Microscopic and Energy Dispersive X - ray Spectral Characterization

1 Scope

This standard specifies the use of SEM and EDX analysis of single-walled carbon nanotubes crude products and purified powder or film products form, elements Composition, catalyst and other inorganic impurities.

This standard applies to the analysis of single-walled carbon nanotubes and can also be used for multi-walled carbon nanotubes (multiwalcarbonnanotubes, Called MWCNTs).

2 Normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article Pieces. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 23414-2009 Terminology for microbeam analysis scanning electron microscopy (ISO 22493.:2008, IDT) ISO/T S80004-3 Nanotechnology terminology - Part 3. Nanotechnology - Vocabulary -Part 3. Carbonnano-objects)

3 Terms and definitions

GB/T 23414-2009, ISO/T S80004-3 Definitions and the following terms and definitions apply to this document.