Biomolecule Dissociation Materials in the DNA of SWCNTs Nanotubes (Based on Nano-Microelectronics PhD) (PhD-Research)

Researcher and author: PhD student : Afshin Rashid)



Note: Many biomolecules have the potential to differentiate between specific DNA types of different nanotubes. The diameter-dependent selective dispersion of SWCNTs is obtained by Chitosan polymer and PEG oligomer polymer by twisting adsorption. 

The complexity of the spiral (Falun mono-nucleotide) on  nanotubes is very interesting. It can  selectively isolate nanotubes (6,8) up to 85% from a wide diameter diameter nanotube sample. DNA has been extensively used to isolate a particular type of nanotube through non-coil twisting  . Using  single-stranded DNA, the nanotubes can be dispersed in solution  , and how the  DNA twists selectively depends on the specific sequence  of the DNA strand. You through the layers of oligo nucleotide (GT (Poly orderly  structure SWCNTs very high on the turns and  cause separation of nanotubes, metal / semiconductor  -based electrical properties of the nanotube diameter  is. After  the interaction between the DNA and nanotubes it'll be done. The DNA separation method is  used to disperse  the nanotubes. During  which the nanotubes (5,6) were enriched from the nanotubes (3,10)  . The enrichment of metal nanotubes increases with the  decrease in DNA length. One method of  purifying single-stranded nanotubes using  DNA twisting coupled to size- and size- dependent chromatography of   DNA separates a particular type  of nanotube from the mixture  , further refining the original semiconductor species with chromatography.  The unique chirality  is separated from a high purity synthetic nanotube blend  .  That the structural order of the SWCNT-DNA hybrid  induces structure recognition SWCNTs  approximate the theory that  the purine-pyrimidine pattern has been identified as a sequence pattern  that can  form a hydrogen bond to form a two-dimensional plate  and  can selectively form a nanoparticle on a  nanowire. Pipes to be wrapped. Separate (5,10) nanotubes  (TTT3)  have been sequenced using DNA with T sequences  that are highly efficient for use  in FET equipment.



Octadecylamine selectively interacts with semiconductor SWCNTs  , provided  that SWCNTs are oxidized. On the contrary, the  use of propyl amines Vayzv propyl amines in  THF, selective adsorption on metallic SWNTs do  it. This results in the solubilization of  the metal nanotubes. Different colors of  the nanotube suspensions are observed  indicating high purity of the specific type of SWCNTs. Amines can also bind to SWCNTs via covalent bonding  , but  there is no selectivity for metallic or semiconductor SWCNTs  .


Conclusion : 

We conclude that different surfactants have been used to classify  SWCNTs by chirality  . Selective separation of  SWCNTs is performed using the added salt SDS solution  . The diameter and chirality- dependent binding  of the general surfactants  (sodium sulfate 10), (sodium  dodecyl benzene 11) sulfonate, and (sodium quaternary 12)  in aqueous solution.


Author: Engineer Afshin Rashid 

PhD student of Nano-Microelectronics at Islamic Azad University, Science and Research Branch, Tehran