SKU: 77733852576

Helical Multi-walled carbon nanotubes

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Description

Helical Multi-walled carbon nanotubesProduct Name Name: Helical Multi walled carbon nanotubes Product Overview Coiled Multi Walled Carbon Nanotubes (CMWCNTs) are a kind of coiled multi walled carbon nanotubes with special morphology. Their structure is characterized by the coiled coiled tube wall. Spiral multi walled carbon nanotubes are formed by a plurality of graphite layers bent around a central axis and arranged spirally to form a continuous tubular structure. Each layer of graphite

Product Name

Name:Helical Multi-walled carbon nanotubes


Product Overview

 

Coiled Multi-Walled Carbon Nanotubes (CMWCNTs) are a kind of coiled multi-walled carbon nanotubes with special morphology. Their structure is characterized by the coiled coiled tube wall. Spiral multi-walled carbon nanotubes are formed by a plurality of graphite layers bent around a central axis and arranged spirally to form a continuous tubular structure. Each layer of graphite interacts with each other through van der Waals forces.

The appearance of spiral multi-walled carbon nanotubes shows a distinct spiral shape, which gives them unique physical and chemical properties. The preparation of spiral multi-walled carbon nanotubes usually involves complex chemical or physical processes, and chemical vapor deposition (CVD) is one of the most common methods for preparing spiral multi-walled carbon nanotubes. Under certain conditions, carbon source gas (such as methane, acetylene, etc.) is introduced into the reaction chamber, and metal catalysts (such as iron, cobalt, nickel, etc.) are used to decompose carbon source gas and deposit carbon nanotubes on the catalyst surface at high temperature. The morphology and structure of spiral multi-walled carbon nanotubes can be controlled by adjusting the catalyst type, concentration, reaction temperature and gas flow rate.


Technical Parameter

OD:00-200 nm

Length:-10 um

CNTs content:gt;90%

Helical CNTs content:>60%

SSA:gt;30m2/g 


Product Features

Mechanical properties: Spiral multi-walled carbon nanotubes have high strength and modulus, and can withstand greater stress and deformation without damage.

Electrical properties: Spiral multi-walled carbon nanotubes have good electrical conductivity, and their electrical properties depend on their diameter, helicity and the number of layers. They may exhibit metallic properties, semiconducting properties, or insulator properties.

Thermal properties: Spiral multi-walled carbon nanotubes have excellent thermal conductivity, which can transfer heat quickly and maintain low thermal resistance.

Chemical stability: Spiral multi-walled carbon nanotubes have high chemical stability and can maintain the stability of their structure and properties in a variety of environments.


Application Fields

Composite materials: Spiral multi-walled carbon nanotubes can be added to the composite as a reinforcing phase to improve the mechanical properties and thermal stability of the composite. They have potential application value in aerospace, automobile manufacturing and other fields.

Electronic devices: Spiral multi-walled carbon nanotubes can be used to construct electronic devices such as field-effect transistors and sensors. Their high conductivity and adjustable electrical properties give these devices excellent performance.

Catalyst support: The high specific surface area and excellent chemical stability of spiral multi-walled carbon nanotubes make them the ideal choice for catalyst support. They can support a variety of metal or non-metal catalysts to improve the activity and stability of the catalyst.

Gas adsorption and separation: Spiral multi-wall carbon nanotubes have strong adsorption capacity for some gases, and can be used to construct gas adsorption materials or gas separation membranes. They have potential application value in air purification, water treatment and other fields.


Related Information

Please e-mail for the detailed characterization data.

E-mail:[email protected]

 

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SKU: 77733852576

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4.0 ★★★★★
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Verified Purchase
Colby D. May
Fort Morgan, US
★★★★★ 4
Almost perfect, absolutely fit for purpose, and a great value
Size: Standard--black
These are really, really close to being five stars, but because of my OCD tendencies when it comes to things being true and level, I can only go four. The way these mounts are made, speakers rest inside and on the inner surface of the L-shaped adjustable side brackets, and not on the large metal plate between them. Leveling on the fore-and-aft plane can easily be handled via the adjustment nut on the bottom of the bracket. But there is no provision for side-to-side leveling, so if the manufacturing of the side brackets is not within tolerance, you'll wind up with a speaker that's ever-so-slightly wonky...which is the case with ONE of my mounts. The bubble is still between the lines, but it's kissing the left line. Most would not care about this, and I'm not too bummed about it, but I am able to see that much out-of-true with the naked eye. It's not enough to pursue any kind of remediation, because the value on these really is awfully good. They are solidly built, easy to install, and easy to adjust. The manufacturer is apparently improving the product as they go based on feedback, as some issues that have vexed other owners have not been a problem for me, such as the wall plates being or coming loose (the design now ensures they stay put once pushed back to the wall), or the adjustment nut and bolt rotating freely and not staying tight (the ones on mine are great and function as intended). For the price, these are really hard to beat, and I have a feeling all the mounts like this with the different oddly-named brands are made in the same factory. That being the case, get the cheapest ones, and the day I bought mine, these were those.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 15, 2025
S
Verified Purchase
Seth Johnson
Lexington, US
★★★★★ 5
Solid and easy to install
Size: Standard--black
These are nice, solid wall mounts. They assembled quickly and easily, and they can hold larger bookshelf speakers like my Cambridge Soundworks M60s. Adjusting the plate to match speaker size is pretty easy, and they seem to grip the speaker tight enough that they won't fall off. The tilt option is very useful and a good feature when speakers are mounted high and need to tilt down toward the listener. Just remember to tighten the bolt on the bottom once you've positioned it where you want it. I would definitely recommend these to anyone looking for solid, well priced speaker mounts.
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Reviewed in the United States on March 30, 2025
M
Verified Purchase
Mark K
Port Orchard, US
★★★★★ 5
Well made. Easy install.
Size: Standard--black, Size: Standard--black
These were easy to install. All the hardware was included. They look good. Seems well made.
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Reviewed in the United States on March 4, 2026
O
Verified Purchase
Optionado
Bozeman, US
★★★★★ 5
Sturdy solution
Size: Standard--black
I needed a way to mount rear speakers and this was the solution. They're sturdy and adjustable to fit reasonably sized speakers. They also pivot up and down and swivel so really perfect.
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Reviewed in the United States on April 18, 2026
E
Verified Purchase
EternianUber
San Leandro, US
★★★★★ 5
Nice unit
Set name: 5.1 Receiver
I'm really happy with this receiver even though I don't have any speakers hooked up to it. Not using it for a speaker setup might sound like a waste of a product to some people but honestly I'm finding plenty of value in it with it's other features. The main reason I looked into getting a receiver was so I could have multiple hdmi devices hooked up to my monitor. I looked into hdmi hubs but there are a couple reasons why I've chosen a receiver instead. 1. Reliability and ease of use. Ok, so like I said I use a monitor in my room, not a tv. Monitors don't have remotes so anytime I want to change the volume or hdmi input I have to do it manually. It's a 32 inch monitor about 3 feet to the side of my bed and it's a nice arms stretch to do so. Not a big deal and while there are plenty of hdmi hubs that offer remote changing or automatic changing I worry about the reliability of those devices. There are plenty of reviews that state their hubs stop working after some months or the automatic hdmi switching starts changing inputs randomly or getting black screens and such. I just didn't want to hassle with things like that. 2. Bluetooth connectivity. This was another feature that I was looking into. Again, there are separate devices that offer this but just like hdmi hubs you will find plenty of reliability concerns. On top of that there's audio lag and previously when I bought a bluetooth transmitter I had to return it for that reason. Nice thing about this receiver is there is an adjustment for the audio to increase or decrease the audio timing but luckily it isn't an issue and the audio seems to be timed perfectly with my bluetooth headphones. It pairs up quickly too. I haven't tried the 4k upscaling with this receiver because I use a 1440p monitor but it's nice to know that it's there. Maybe in the future I will find a use for it. There's also some neat audio presets for things like movies, music and gaming. It's actually a pretty extensive list. I suppose I should also mention that each hdmi input can be named to your liking for a nice customization feel so when you flip through them you know exactly what's connected to that input. You can even use the hdmi ports when the unit is in standby mode but you won't be able to use the bluetooth connectivity. In the end I think this was a good purchase. It's priced reasonably and I'm getting good use out of it. Sound quality is great and the customizable features are a definite plus. More expensive than getting an hdmi hub and bluetooth transmitter but I think the reliability and extra features make up for this.
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Reviewed in the United States on July 23, 2019

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