Forces, energetics, and dynamics of conjugated-carbon ring tethers adhered to CNTs: a computational investigation

2018 ◽  
Vol 20 (16) ◽  
pp. 11327-11335 ◽  
Author(s):  
Nicholas Filla ◽  
Ramaraja Ramasamy ◽  
Xianqiao Wang
Keyword(s):  
Carbon Nanotubes ◽  
Vital Role ◽  
Computational Investigation ◽  
Carbon Ring ◽  
Enzyme Sensors

The strength and nature of the interactions between carbon nanotubes (CNTs) and molecular tethers plays a vital role in technology such as CNT–enzyme sensors.

Application of Carbon Nanotubes in Nanomedicine

2017 ◽  
pp. 2021-2062
Author(s):  
Omid Moradi ◽  
Hamidreza Sadegh ◽  
Ramin Shahryari-Ghoshekandi ◽  
Mehdi Norouzi
Keyword(s):  
Carbon Nanotubes ◽  
Drug Delivery ◽  
Gene Delivery ◽  
Medical Science ◽  
Vital Role ◽  
Medical Applications ◽  
Cell Penetration ◽  
Modern Life ◽  
Technological Field ◽  
History Of

Carbon Nanotubes (CNTs) have become a technological field with great potential since they can be applied in almost every aspect of modern life. One of the sectors where CNTs are expected to play a vital role is the field of medical science. This chapter focuses on the latest developments in applications of CNTs for nanomedicine. A brief history of CNTs and a general introduction to the field are presented. Then, the preparation of CNTs that makes them ideal for use in medical applications is highlighted. Examples of common applications, including cell penetration, drug delivery, and gene delivery and imaging are given. Finally, the toxicity of carbon nanotubes is discussed.

Prevention of Surface Crack Formations on Polymeric Coatings Using Carbon Nanotubes

2010 ◽  
Author(s):  
R. Asmatulu ◽  
G. A. Mahmud
Keyword(s):  
Carbon Nanotubes ◽  
Environmental Factors ◽  
Uv Light ◽  
Life Time ◽  
Vital Role ◽  
Polymeric Coatings ◽  
Functional Coating ◽  
Multi Wall Carbon Nanotubes ◽  
Force Microscopy ◽  
Us Economy

Polymeric coatings are frequently utilized for the protection of materials surface against UV light and other environmental factors (e.g., oxygen, pollutants and moistures) by many industries. However, the organic films have yet to be perfected and failures due to the degradation caused by the environmental factors are potential hazards. These hazards can cost the US economy billions of dollars and cause serious accidents. In order to minimize UV and other environmental factors on the polymeric coatings, new studies are focused on functional coating systems. In the present study, we have developed a nanocomposite coatings to reduce the crack formations and increase the life-time of the coatings. Different weight percentages (0%, 0.25%, 0.5%, 1% and 2%) of multi-wall carbon nanotubes (MWCNTs) were indvidually dispersed in the coating maetrials, and then sprayed on the surfaces of aircraft Al alloys. UV light and salt chamber tests were applied to the prepared coating samples. Optical microscopy and atomic force microscopy (AFM) studies showed that the micro and nanocrack formations on coatings were significanly lowered at higher MWCNT loadings (e.g., 2%). As a results, it is concluded that CNTs played a vital role in protecting of polymeric coatings against UV degradation and corrosion.

Mesh-Free Numerical Simulation for Carbon Nanotubes upon Bending

2010 ◽  
Vol 139-141 ◽  
pp. 17-21
Author(s):  
Bin Gao ◽  
Yu Zhou Sun ◽  
Jin Bao Wang
Keyword(s):  
Carbon Nanotubes ◽  
Compressive Strain ◽  
Vital Role ◽  
Higher Order ◽  
Least Square ◽  
Cylindrical Shape ◽  
Graphite Sheet ◽  
Current Configuration ◽  
Moving Least Square ◽  
Mesh Free

This paper presents a mesh-free numerical modeling approach for carbon nanotubes (CNTs) subjected to bending loads. The higher-order Cauchy-Born rule was employed to construct the higher-order continuum constitutive model. An initial equilibrium single-walled CNT (SWCNT) was viewed as been formed by rolling up a graphite sheet into a cylindrical shape. The deformation from an original SWCNT to the current configuration was approximated with the moving least-square (MLS) approximation, and the mesh-free computational framework was established in the theoretical scheme of higher-order gradient continuum. Mesh-free numerical simulations were carried out for SWCNTs, and the accuracy and convergence were discussed in comparison with the results of atomistic simulation. The buckling behavior was studied for various types of SWCNTs upon bending, and the buckling mechanism was investigated in virtue of the continuum variables, which showed that the maximum axial compressive strain played a vital role in the development of kinking.

Zinc and Aluminum Phthalocyanine Modified Carbon Nanotubes; Preparation and Characterizations

2021 ◽  
Vol 19 (9) ◽  
pp. 132-141
Author(s):  
Shaymaa Hussein Nowfal ◽  
Hikmat Adnan Banimuslem ◽  
Nassar A. Al-Isawi ◽  
Hayder M.A. Ghanimi
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Hybrid Materials ◽  
Vital Role ◽  
Zinc Phthalocyanine ◽  
Visible Absorption ◽  
Current Voltage ◽  
Multi Walled Carbon Nanotubes ◽  
Modified Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In this work, two elements were developed. The first is Multi walled carbon nanotubes-zinc phthalocyanine (ZnPcs). In addition, there was also a development of the multi walled carbon nanotubes-aluminium phthalocyanine hybrid materials. The multi-walled carbon nanotubes were under treated with nitric combined with the sulfuric acid before being mixed with phthalocyanines to de-build the effects. Drop-casting hybrid materials to slides of the glass and interdigitating electrodes from their dimethylformamide solution have been done. The perfect hybridization owing to π-π interaction was discovered. This discovery was assisted by two elements. The first is the ultraviolet-visible absorption spectroscopy. Moreover, another element that played a vital role in this discovery is Fourier Transform Infrared Spectroscopy. The hybrid films were tested for current-voltage measurements and direct electrical conductivity. This work has also examined how temperature affects direct electrical conductivity and power generation.

Nanotubes and nanoparticles based 3D scaffolds for the construction of high performance Biosensors

2014 ◽  
Vol 1700 ◽  
pp. 97-102
Author(s):  
Meenakshi Singh ◽  
Michael Holzinger ◽  
Maryam Tabrizian ◽  
Serge Cosnier
Keyword(s):  
Carbon Nanotubes ◽  
Glucose Oxidase ◽  
Current Density ◽  
High Performance ◽  
Single Walled Carbon Nanotubes ◽  
3D Scaffolds ◽  
Pore Sizes ◽  
Enzyme Sensors ◽  
The One ◽  
Walled Carbon Nanotubes

ABSTRACT3D scaffolds with different pore sizes, using single-walled carbon nanotubes (SWCNTs) and nanoparticles of different size were constructed. Biotinylated glucose oxidase (GOX-B) and anti-cholera toxin (anti-CT) were immobilized onto the one and two level nanoscaffolds, functionalized with pyrene-β-cyclodextrin for the construction of glucose based enzyme sensors and immunosensors, respectively. For enzyme sensors, highest current density and sensitivity (41.72 μA cm-2, 3 mA M-1 cm-2) were obtained with two level scaffolds made with 100 nm nanoparticles. In contrast to this, for immunosensors, highest current density and sensitivity (11.71 μA cm-2, 116.2 μA M-1 cm-2) were obtained with two level scaffolds made with 500 nm nanoparticles, indicating that the pore sizes can be adjusted using different size of nanoparticles for the respective applications.

Application of Carbon Nanotubes in Nanomedicine

2015 ◽  
pp. 90-128 ◽  
Author(s):  
Omid Moradi ◽  
Hamidreza Sadegh ◽  
Ramin Shahryari-Ghoshekandi ◽  
Mehdi Norouzi
Keyword(s):  
Carbon Nanotubes ◽  
Drug Delivery ◽  
Gene Delivery ◽  
Medical Science ◽  
Vital Role ◽  
Medical Applications ◽  
Cell Penetration ◽  
Modern Life ◽  
Technological Field ◽  
History Of

Carbon Nanotubes (CNTs) have become a technological field with great potential since they can be applied in almost every aspect of modern life. One of the sectors where CNTs are expected to play a vital role is the field of medical science. This chapter focuses on the latest developments in applications of CNTs for nanomedicine. A brief history of CNTs and a general introduction to the field are presented. Then, the preparation of CNTs that makes them ideal for use in medical applications is highlighted. Examples of common applications, including cell penetration, drug delivery, and gene delivery and imaging are given. Finally, the toxicity of carbon nanotubes is discussed.

Computational Investigation of Large-Diameter Carbon Nanotubes in Bundles for High-Strength Materials

2020 ◽  
Vol 3 (6) ◽  
pp. 5014-5018 ◽  
Author(s):  
Chinomso Onuoha ◽  
Grigorii Drozdov ◽  
Zhiyong Liang ◽  
Gregory M. Odegard ◽  
Emilie J. Siochi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Large Diameter ◽  
High Strength ◽  
Computational Investigation

scholarly journals Experimental and Computational Investigation of Hydrogen Evolution Reaction Mechanism on Nitrogen Functionalized Carbon Nanotubes

ChemCatChem ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 3872-3882 ◽  
Author(s):  
Sami Tuomi ◽  
Olli J. Pakkanen ◽  
Maryam Borghei ◽  
Rasmus Kronberg ◽  
Jani Sainio ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Reaction Mechanism ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Computational Investigation ◽  
Functionalized Carbon Nanotubes
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