DWCNT

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Shandong TANFENG New Materials Technology Co., Ltd. produces and sells "Double-walled carbon nanotubes (DWCNT)" and "Double-walled carbon nanotubes with a concentration of 60%, carboxylation-COOH and hydroxylation-OH single-walled carbon tubes can be made, and the tube diameter length is optional". This product is only for scientific research. If you need it, please contact us.

Double-walled carbon nanotubes (DWCNT) are a synthetic mixture of single-walled and multi-walled nanotubes, showing properties that are between the two types. DWCNT consists of two concentric nanotubes that are exactly 0.35-0.40nm apart, with sufficient band gap for field effect transistors. The inner and outer walls of DWCNT each have separate optical and Raman scattering properties. In theory, if each wall behaves like a SWCNT, then depending on the (n, m) values ​​of its inner and outer walls, DWCNT can be composed of four combinations based on the electronic type (metal or semiconductor), such as metal-metal (inside-outside), metal-semiconductor, semiconductor-metal, and semiconductor-semiconductor. Some experimental studies have found that DWCNTs may behave as metals even though both walls are semiconductors. This complex overall electrical behavior limits the use of DWCNTs in applications such as thin film electronics. However, DWCNTs also exhibit several favorable properties such as improved lifetime, density in field emission, and high stability under aggressive chemical, mechanical and thermal treatments, as well as observed flexibility. Selective functionalization of the outer wall allows DWCNTs to present a core-shell system made of a pristine carbon nanotube and a chemically functionalized nanotube shell, which can be used as imaging and therapeutic agents in biological systems. DWCNTs can also be used as gas sensors as sensitive materials to detect gases such as H2, NH3, NO2 or O2, for technologically demanding applications such as field emission displays and photovoltaic devices.

We can provide you with high-quality SWCNTs, MWCNTs and DWCNTs, some of the most conductive additives available today, to meet your innovative and advanced materials research needs.

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