Ossila/欧西拉 品牌
代理商厂商性质
深圳市所在地
英国Ossila紫外线臭氧清洗机E511 进口紫外线臭氧清洗机
面议Ossila材料PTB7 CAS:1266549-31-8 PTB7
面议Ossila材料TFB CAS:220797-16-0
面议OFET测试晶片S181 Ossila测试晶片S182 代理Ossila
面议英国Ossila晶片S403 OFET测试晶片S411
面议代理英国Ossila材料P3HT 104934-50-1 Ossila有机光伏材料
面议PDPP2T-TT-OD Ossila材料DPP-DTT 1260685-66-2 (1444870
面议石墨烯 英国Ossila石墨烯氧化物E881 进口石墨烯氧化物E882
面议代理Ossila 双壁碳纳米管 Ossila碳纳米管M2016L1
面议英国Ossila薄层电阻测量系统 代理Ossila
面议Ossila旋转涂布机 进口旋转涂布机 旋转涂布仪 Ossila代理
面议只用于动物实验研究等
All our SWNTs come packed as dry powders, which can be dispersed within the user's solvent of choice.
Product code | M2012L1 | M2013L1 | M2013L2 |
Outer Diameter | < 2 nm | < 2 nm | < 2 nm |
Length | 5-50 μm | 4-20 μm | 5-30 μm |
Specific Surface Area | 500-700 m2.g-1 | 400-1000 m2.g-1 | 400-1000 m2.g-1 |
Purity | > 90% | > 95% | > 95% |
MSDS | |||
Sale Quantities | 1 g | 250 mg, 500 mg, 1 g | |
Packaging Information | Light-resistant bottle |
*For larger orders, please us to discuss prices.
Product code | M2014L1 | M2015L1 |
Outer Diameter | < 2 nm | < 2 nm |
Length | 5-30 μm | 5-30 μm |
Specific Surface Area | 380 m2.g-1 | 380 m2.g-1 |
Functional Group | COOH | OH |
Functional Group Wt.% | ~ 3% | ~ 4% |
Purity | > 90% | > 90% |
MSDS | ||
Sale Quantities | 250 mg, 500 mg, 1 g | |
Packaging Information | Light-resistant bottle |
单壁碳纳米管M2013L2 Ossila碳纳米管M2012L1 进口碳纳米管M2013L1
*For larger orders, please us to discuss prices.
SWNTs are sheets of graphene that have been rolled up to form a long hollow tube, with walls a single atom thick. The existence of thin, hollow carbon tubes has been known about since their first observations by L. V. Radushkevich and V. M. Lukyanovich in 1952, however, the first observations of SWNTs themselves were not until 1976 when M. Endo synthesised a series of hollow carbon tubes via chemical vapour-growth. Wider interest in these low-dimensional materials did not occur until 1991, when two articles were independently published by: i) S. Iijima on the fabrication of multi-walled carbon nanotubes via arc discharge, and ii) J. W. Mintire, B. I. Dunlap, and C. T. White on the predicted properties of SWNTs. The combination of a simple method for producing SWNTs and the potentially extraordinary properties they exhibit kick-started the growth of a wider research community into carbon nanotubes. 单壁碳纳米管M2013L2 Ossila碳纳米管M2012L1 进口碳纳米管M2013L1 Much like graphene, SWNTs have properties that differ considerably to those of bulk carbon (e.g. graphite). The mechanical properties vary significantly depending upon the axis you are measuring with nanotubes having extremely high Youngs Moduli (Up to 1TPa) and tensile strength (Up to 100 GPa) along the longitudinal axis. Along the radial axis, these values are a few orders of magnitude lower. | |||
The electrical properties of carbon nanotubes are dependent upon the orientation of the lattice. The lattice orientation is given by two parameters (n, m). The image to the right shows how the n and m orientations relate to the longitudinal axis of the nanotube and the rotational axis. There are typically three types of nanotubes that can form, these are: the armchair (where n = m), zig-zag (n=x, m=0), and chiral (n=x, m=y). Carbon nanotubes can exhibit either metallic properties or semiconducting properties, depending upon the orientation of the lattice. Zig-zag and armchair carbon nanotubes exhibit metallic properties, whilst chiral nanotubes can be either metallic or semiconducting depending upon the difference between the n and m units. In addition to this ability to exhibit both metallic and semiconducting electronic structures carbon nanotubes offer exceptional charge carrier mobilities, this is due to the combination of the delocalisation of electrons across the lattice and the small dimensions in the radial axis constraining movement of charge carriers along the longitudinal axis of the tubes. | How the lattice parameters relate to the physical structure of carbon nanotubes. | ||
In addition to the electronic and mechanical properties of SWNTs, the thermal properties of these materials exhibit extreme anisotropy. Along the length of the tube, thermal conductivity can be up to 9 times higher than materials such as copper. However - across the radial axis, the thermal conductivity can be 250 times lower than that of copper. Much like its electrical and mechanical properties, SWNT's thermal properties can be severely affected by the presence of defects along the nanotube length. The presence of these defects lead to phonon scattering. When these defects interact with low frequency phonons, scattering can occur - reducing the thermal conductivity. At the time being, there are limited commercial applications for SWNTs. They are used in composite materials as a method of improving mechanical strength. One of the current limiting factors in improving the range of applications of carbon nanotubes is the ordering of nanotube structure. Current commercial applications utilise disordered bundles of nanotubes, and these bundles have a significantly lower performance than that of individual nanotubes. Potential future uses for carbon nanotubes could be seen in areas such as transparent conducting layers for use in display technologies, conductive wires for nanoelectronics, electrodes in thin-film electronic devices, carbon nanotube yarns for ultra-strong fabrics, thermal management systems, advanced drug delivery systems and many other wide-ranging fields. |
Dispersion Guides
SWNTs are insoluble as prepared. However, through the use of surfactants and ultrasonic probes, it is possible to disperse and suspend small concentrations of nanotubes. For dispersing in aqueous solutions, we recommend the use of sodium dodecylbenzene sulfonate if an ionic surfactant is suitable. If a nonionic surfactant is needed, we recommend surfactants with high molecular weights.
For functionalised SWNTs, it is possible to disperse them without the use of any surfactants. However, the total concentration of dispersed nanotubes will be lower. A maximum of 0.1mg/ml can be achieved for -COOH and -OH.
Technical Data
CAS number | 7440-44-0 |
Chemical formula | CxHy |
Recommended Dispersants | DI Water, DMF, THF, Ethanol, Acetone |
Synonyms | Single-Walled Carbon Nanotubes, Single-Wall Carbon Nanotube, Carbon Nanotube, SWNT, CNT |
Classification / Family | 1D materials, Carbon nanomaterials, Nanomaterials, Polycyclic aromatic hydrocarbons, thin-film electronics |
Appearance | Black fibrous powder |
Raman spectra of SWNT samples showing the presence of the G+ and G- band, the D band, and also the radial breathing mode peaks.
TEM image of an individual SWNT.
XPS spectra of the C1s peak for functionalized carbon nanotubes showing the presence of C-C, C-O, and O-C=O bonds.
Single-Wall Carbon Nanotubes
Double-Walled Carbon Nanotubes
Multi-Walled Carbon Nanotubes