Multi Walled Carbon Nanotubes

Multi Walled Carbon Nanotubes

Multi Walled Carbon Nanotubes (MWNTs) are hollow, cylindrically shaped allotropes of carbon that have a high aspect ratio (length to diameter ratio). Their name is derived from their structure and the walls are formed by multiple one-atom-thick sheets of carbon. MWNTs consist of multiple rolled layers of concentric nanotubes of graphene inside other nanotubes.

tem image multi walled carbon nanotubes 30-50nm

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Functionalized, helical, and short multi walled carbon nanotubes are also available. Prices are per gram, kg’s are available 1000g. Prices are given as ranges.

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  • Multi Walled Carbon Nanotubes 10-20nm

    Multi Walled Carbon Nanotubes 10-20nm

    $0.90 - $15.00 / per gram
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  • A TEMulti Walled Carbon Nanotubes 20-30nm

    Multi Walled Carbon Nanotubes 20-30nm

    $0.70 - $10.00 / per gram
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  • Multi Walled Carbon Nanotubes 20nm

    Multi Walled Carbon Nanotubes 20nm

    $2.00 - $25.00 / per gram
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  • Multi Walled Carbon Nanotubes 30-50nm

    Multi Walled Carbon Nanotubes 30-50nm

    $0.70 - $10.00 / per gram
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  • Multi Walled Nanotubes-MWNTs 95wt% >50nm OD

    Multi Walled Carbon Nanotubes 50nm

    $0.60 - $10.00 / per gram
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  • Multi Walled Carbon Nanotubes 8-15nm

    Multi Walled Carbon Nanotubes 8-15nm

    $0.90 - $15.00 / per gram
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  • Multi Walled Carbon Nanotubes 8nm

    Multi Walled Carbon Nanotubes 8nm

    $1.50 - $15.00 / per gram
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Multi Walled Carbon Nanotubes Defintion

Multi walled carbon nanotubes (MWCNTs) consist of multiple rolled layers (concentric tubes) of graphene layers in a one dimensional format.

Two main models can be used to describe the structures of multi-walled nanotubes. The Russian doll model consists of sheets of graphite arranged in concentric cylinders. In the Parchment model, a single sheet of graphite is rolled in around itself, resembling a scroll of parchment or a rolled newspaper.

The interlayer distance in multi-walled nanotubes is close to the distance between graphene like layers, approximately 3.4 Å. The Russian Doll structure is observed more commonly. Typically, MWCNTs have outer diameters from 2-100nm and lengths from 0.5-50um although MWCNTs with lengths up to 1mm are available in array format.

Multi Walled Carbon Nanotubes Properties

The properties of Multi Walled Carbon Nanotubes are unique because they come in a complex array of forms and each concentric nanotube can have a different structure, there are a variety of sequential arrangements.

The simplest sequence is when concentric layers are identical but different in diameter. However, mixed variants are possible, consisting of two or more types of concentric Carbon Nanotubes (CNTs) arranged in different orders. These can have either regular layering or random layering.

The structure of the carbon nanotubes influences its properties including electrical and thermal conductivity, density, and lattice structure. Both type and diameter are important. The wider the diameter of the carbon nanotube (CNTs), the more it behaves like graphite. The narrower the diameter of the Carbon Nanotubes (CNTs), the more its intrinsic properties depends upon its specific type.

Multi Walled Carbon Nanotubes properties come from their all carbon structure, extremely small geometries and high aspect ratio. MWCNTs are a great choice of nanoscale additives and can improve mechanical properties as well as electrical and thermal conductivity in the products you add them into. They are typically added in 2-5wt% loading ratios. Masterbatches typically have 10, 15, or 20% Multi walled carbon nanotubes loading.

Multi Walled Carbon Nanotubes Applications

MWCNTs Applications include:

Caulks and sealants
Advanced ceramics
Semiconducting materials
Drug delivery
Membrane and filters
Medical implants
Lithium ion batteries
Sporting goods (tennis rackets, bike rims)
Aerospace
Textiles & fibers
Electromagnetic Shielding
Catalysts (petrochemical)
Sensors and Instruments
Coatings (conductive thin films)
Conductive polymers & composites (automobiles and electronics)
Paints

What’s the difference between single walled and multi walled carbon nanotubes?

As shown above, a single walled carbon nanotube has just one wall. True SWCNTs are typically made by HIPCO or Arc methods. A multi walled carbon nanotubes are tubes inside of other tubes as shown in the image below. MWCNTs can have different chiral structures within the same CNT.

the-difference-between-single-walled-and-multi-walled-carbon-nanotubes

Multi Walled Carbon Nanotubes SDS

Please see our Multi Walled Carbon Nanotubes SDS

Publications using Multi Walled Carbon Nanotubes from Cheap Tubes Inc

Natural Organic Matter (NOM) Adsorption to Multi-Walled Carbon Nanotubes: Effect of NOM Characteristics and Water Quality Parameters

Photo-catalyzed degradation of hazardous dye methyl orange by use of a composite catalyst consisting of multi-walled carbon nanotubes and titanium dioxide

Transport Behavior of Functionalized Multi-Wall Carbon Nanotubes in Water-Saturated Quartz Sand as a Function of Tube Length

Removal of bisphenol A from landfill leachate using single-walled carbon nanotubes

Hexavalent chromium removal by various adsorbents: Powdered activated carbon, chitosan, and single/multi-walled carbon nanotubes

Low-velocity impact of thin woven carbon fabric composites incorporating multi-walled carbon nanotubes

On the aspect ratio effect of multi-walled carbon nanotube reinforcements on the mechanical properties of cementitious nanocomposites

Conductive cable fibers with insulating surface prepared by co-axial electrospinning of multi-walled nanotubes and cellulose

Graphene versus Multi – Walled Carbon Nanotubes for Electrochemical Glucose Biosensing

Multi Walled Carbon Nanotubes Price

Multi walled carbon nanotubes price typically depends on it’s diameter, post production treatments such as functionalization or shortening, and volume. As with many materials, the more you buy the more you save. Our MWCNTs prices are all available on our website. Simply click the “select options” button which takes you the specific product page and enter the quantity you need. Our cart adjusts the prices automatically for the quantity entered.

Concentric Multi Walled Carbon Nanotubes

Below is a representation of the atomic structure of concentric multi walled carbon nanotubes.

multi-walled-carbon-nanotubes-molecular-structure-inside-view

Russian Doll Multi Walled Carbon Nanotubes

Below is a representation of the atomic structure of russian doll MWNTs. Each concentric multi walled carbon nanotube can have different structures, and hence there are a variety of sequential arrangements. The simplest sequence is when concentric layers are identical but different in diameter. However, mixed variants are possible, consisting of two or more types of concentric Carbon Nanotubes (CNTs) arranged in different orders. These can have either regular layering or random layering.

multi-walled-carbon-nanotubes-molecular-structure

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