Abstract

In addition to that, the presence of particles prevents the selective reaction of internal nanotubes, and this issue of purity confuses nanotubes based on their size, type, or use as macromolecular species. Absorption spectroscopy (NIR-Vis-UV) can be used to check the population of the sample or the degree of grouping of the sample. If how to distribute nanotubes by NIR-Vis-UV absorption spectroscopy is desired, the sample should be dispersed or in the form of a thin layer. Optical absorption measurements provide useful information about the electronic properties of SWCNTs, and this information can be used to study covalent and non-covalent interactions between molecules and nanotubes. When functional groups are covalently placed on the nanotube, the absorption peaks completely, clearly weaken, or even disappear because the structure of nanotubes changes from some SP2 hexagonal structure to parts of the structure a> and selectivity towards nanosheets /span>, or saturation of the conduction band like the weakening of electron transfers, create NIR-vis-UV, and both cause (doping-n) such as (Cs, K) or electron acceptors, very similar changes in the spectrum (Br2, leading to the preparation of valence electrons like (dopingPNon-covalent doping or molecular absorption, different, has two important uses: the rate of covalent reactions and NIR-VIS-UV absorption spectroscopy SP3 changes. Absorption spectroscopy should be used to estimate the abundance of metal and semiconductor species by comparing the intensity of the corresponding peaks; because the position of these resonance peaks depends on chirality and diameter. For qualitative analysis, absorption spectroscopy is excellent because it shows the overall composition of the sample