11/29/2023 0 Comments Nms carbon nanotubesSome of these properties were directed towards transferring the unique electrical properties associated with CNTs to rather insulating polymer matrices with the aim of obtaining conducting polymer composites. Since then, various techniques to incorporate CNTs in polymer matrices have been designed with a desire to fabricate new advanced materials with multifunctional properties. 2 The fascinating properties associated with CNTs were believed to open new paths in the material world, especially in the field of conductive polymer and CNT-based composites. The diameters are in the range between fractions of nanometres and tens of nanometres and lengths are up to several centimetres with both their ends normally capped by fullerene-like structures. CNTs can be described as a graphite sheet rolled up into a nanoscale-tube (which are single-wall carbon nanotubes (SWCNTs)), or with additional graphene tubes around the core of an SWCNT (which are multi-wall CNTs (MWCNTs)). 1) has driven global scientific research and technological attention with the hope to revolutionise various frontiers in the field of nanotechnology. Introduction The discovery of CNTs by Iijima in 1991 ( ref. Therefore, the nanocomposites of interest consisting of polymer and CNTs have received a great deal of attention for gas-sensing application due to higher sensitivity over a wide range of gas concentrations at room temperature compared to only using CNTs and the polymer of interest separately. However, CNTs still have certain limitations for gas sensor application, such as a long recovery time, limited gas detection, and weakness to humidity and other gases. Conductive-based devices have already been demonstrated as gas sensors. Such properties make CNTs ideal for nano-scale gas-sensing materials. The presence of O 2, NH 3, NO 2 gases and many other chemicals and molecules can either donate or accept electrons, resulting in an alteration of the overall conductivity. Particularly, the advent of CNTs has fuelled the invention of CNT-based gas sensors which are very sensitive to the surrounding environment. This offers great potential applications, such as in gas sensor devices working at room temperature. The extremely high surface-to-volume ratio, geometry, and hollow structure of nanomaterials are ideal for the adsorption of gas molecules. Functionalised CNTs have been playing an increasingly central role in the research, development, and application of carbon nanotube-based nanomaterials and systems. The current state of research in CNTs either single wall or multiwall/polymer nanocomposites has been reviewed in context with the various types of functionalisation presently employed. As studies progressed, the methodology for CNTs dispersion was established. However, poor solubility in aqueous and organic solvents has hindered the utilisation and applications of carbon nanotubes. Carbon nanotubes (CNTs) have been recognised as a promising material in a wide range of applications, from safety to energy-related devices.
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