Electrical and optical polarization responses of composite films based on aligned carbon nanotubes

RSC Advances ◽  
2015 ◽  
Vol 5 (105) ◽  
pp. 86811-86816 ◽  
Author(s):  
Yuejiang Wen ◽  
Xiangdong Xu ◽  
Minghui Sun ◽  
Qiong He ◽  
Meng Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Vanadium Oxide ◽  
Composite Films ◽  
Optical Polarization ◽  
Large Area ◽  
Efficient Approach ◽  
Aligned Carbon Nanotubes ◽  
Prepared Composite

A simple and efficient approach for large-area preparation of horizontally-aligned carbon nanotube (CNT)–vanadium oxide (VOx) composite films is presented. The as-prepared composite films particularly exhibit electrical and optical anisotropies.

Chemical structures and physical properties of vanadium oxide films modified by single-walled carbon nanotubes

2016 ◽  
Vol 18 (3) ◽  
pp. 1422-1428 ◽  
Author(s):  
Qiong He ◽  
Xiangdong Xu ◽  
Meng Wang ◽  
Minghui Sun ◽  
Yadong Jiang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Physical Properties ◽  
Vanadium Oxide ◽  
Composite Films ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Chemical Structures ◽  
Walled Carbon Nanotubes

A series of vanadium oxide (VOx)–single-walled carbon nanotube (SWCNT) composite films with different SWCNT concentrations were prepared and systematically investigated. The critical SWCNT concentrations for modification of VOx films were experimentally deduced.

Fabrication of Carbon Nanotube Triode Using Helicon Plasma Cvd with Electroplated Nico Catalyst

2003 ◽  
Vol 772 ◽  
Author(s):  
Masakazu Muroyama ◽  
Kazuto Kimura ◽  
Takao Yagi ◽  
Ichiro Saito
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Metal Catalyst ◽  
Ni Catalyst ◽  
Plasma Cvd ◽  
Helicon Plasma ◽  
Plasma Enhanced Cvd ◽  
Turn On ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

AbstractA carbon nanotube triode using Helicon Plasma-enhanced CVD with electroplated NiCo catalyst has been successfully fabricated. Isolated NiCo based metal catalyst was deposited at the bottom of the cathode wells by electroplating methods to control the density of carbon nanotubes and also reduce the activation energy of its growth. Helicon Plasma-enhanced CVD (HPECVD) has been used to deposit nanotubes at 400°C. Vertically aligned carbon nanotubes were then grown selectively on the electroplated Ni catalyst. Field emission measurements were performed with a triode structure. At a cathode to anode gap of 1.1mm, the turn on voltage for the gate was 170V.

scholarly journals A Review: Carbon Nanotube-Based Piezoresistive Strain Sensors

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Waris Obitayo ◽  
Tao Liu
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Composite Films ◽  
Strain Sensors ◽  
Voltage Response ◽  
Strain Sensing ◽  
Multiwalled Carbon ◽  
Sensing Applications ◽  
Mechanical Deformations ◽  
Electrical Resistivities

The use of carbon nanotubes for piezoresistive strain sensors has acquired significant attention due to its unique electromechanical properties. In this comprehensive review paper, we discussed some important aspects of carbon nanotubes for strain sensing at both the nanoscale and macroscale. Carbon nanotubes undergo changes in their band structures when subjected to mechanical deformations. This phenomenon makes them applicable for strain sensing applications. This paper signifies the type of carbon nanotubes best suitable for piezoresistive strain sensors. The electrical resistivities of carbon nanotube thin film increase linearly with strain, making it an ideal material for a piezoresistive strain sensor. Carbon nanotube composite films, which are usually fabricated by mixing small amounts of single-walled or multiwalled carbon nanotubes with selected polymers, have shown promising characteristics of piezoresistive strain sensors. Studies also show that carbon nanotubes display a stable and predictable voltage response as a function of temperature.

Mechanical Properties Of Polyaniline / Multi-walled Carbon Nanotube Composite Films

2003 ◽  
Vol 791 ◽  
Author(s):  
P. C. Ramamurthy ◽  
W. R. Harrell ◽  
R. V. Gregory ◽  
B. Sadanadan ◽  
A. M. Rao
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Composite Films ◽  
Weight Percent ◽  
Organic Electronic Devices ◽  
Multiwalled Carbon ◽  
Multi Walled Carbon Nanotube ◽  
Contact Devices ◽  
Carbon Nanotube Composite

ABSTRACTHigh molecular weight polyaniline / multi-walled carbon nanotube composite films were fabricated using solution processing. Composite films with various weight percentages of multiwalled carbon nanotubes were fabricated. Physical properties of these composites were analyzed by thermogravimetric analysis, tensile testing, and scanning electron microscopy. These results indicate that the addition of multiwalled nanotubes to polyaniline significantly enhances the mechanical properties of the films. In addition, metal–semiconductor (composite) (MS) contact devices were fabricated, and it was observed that the current level in the films increased with increasing multiwalled nanotube content. Furthermore, it was observed that polyaniline containing one weight percent of carbon nanotubes appears to be the most promising composition for applications in organic electronic devices.

scholarly journals Growth and structural discrimination of cortical neurons on randomly oriented and vertically aligned dense carbon nanotube networks

2014 ◽  
Vol 5 ◽  
pp. 1575-1579 ◽  
Author(s):  
Christoph Nick ◽  
Sandeep Yadav ◽  
Ravi Joshi ◽  
Christiane Thielemann ◽  
Jörg J Schneider
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Cortical Neurons ◽  
Three Dimensional ◽  
Vertically Aligned Carbon Nanotubes ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
The Individual ◽  
Carbon Nanotube Networks ◽  
Communication Paths

The growth of cortical neurons on three dimensional structures of spatially defined (structured) randomly oriented, as well as on vertically aligned, carbon nanotubes (CNT) is studied. Cortical neurons are attracted towards both types of CNT nano-architectures. For both, neurons form clusters in close vicinity to the CNT structures whereupon the randomly oriented CNTs are more closely colonised than the CNT pillars. Neurons develop communication paths via neurites on both nanoarchitectures. These neuron cells attach preferentially on the CNT sidewalls of the vertically aligned CNT architecture instead than onto the tips of the individual CNT pillars.

The Effect of Nanotube Loading and Dispersion on the Three-Dimensional Nanostructure of Carbon Nanotube-Conducting Polymer Composite Films

2002 ◽  
Vol 739 ◽  
Author(s):  
Mark Hughes ◽  
George Z. Chen ◽  
Milo S. P. Shaffer ◽  
Derek J. Fray ◽  
Alan H. Windle
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Conducting Polymer ◽  
Polymer Composite ◽  
Electrochemical Polymerization ◽  
Composite Films ◽  
Three Dimensional ◽  
Ionic Diffusion ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

ABSTRACTNanoporous composite films of multi-walled carbon nanotubes (MWNTs) and either polypyrrole (PPy) or poly(3-methylthiophene) (P3MeT) were grown using an electrochemical polymerization technique in which the nanotubes and conducting polymer were deposited simultaneously. The concentration and dispersion of MWNTs in the polymerization electrolyte was found to have a significant effect on the thickness of polymer coated on each MWNT and hence the loading of MWNTs in the films produced. It has been shown that for an increasing concentration of MWNTs in the polymerization electrolyte, the thickness of polymer coated on each MWNT decreases. This relationship made it possible to minimize ionic diffusion distances within the nanoporous MWNT-PPy films produced, reducing their electrical and ionic resistance and increasing their capacitance relative to similarly prepared pure PPy films.

On finding of high piezoresistive response of carbon nanotube films without surfactants for in-plane strain detection

2011 ◽  
Vol 22 (18) ◽  
pp. 2155-2159 ◽  
Author(s):  
Y. Miao ◽  
L. Chen ◽  
Y. Lin ◽  
R. Sammynaiken ◽  
W. J. Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Plane Strain ◽  
Composite Films ◽  
Strain Sensors ◽  
Gauge Factor ◽  
Experimental Discovery ◽  
Strain Detection ◽  
Nanotube Films

The use of carbon nanotubes (CNTs) for construction of sensors is promising. This is due to some unique characteristics of CNTs. In recent years, strain sensors built from CNT composite films have been developed; however, their low piezoresistive sensitivity (gauge factor (GF)) in in-plane strain detection is a concern compared with other strain sensors. This article reports an experimental discovery of the superior piezoresistive response of a CNT film that is free of surfactants, known as the pure CNT film. The mechanism for the high GF with the pure CNT film strain sensors is also discussed.

Adsorption of Fluoride by Aligned Carbon Nanotubes Supported Ceria Nanoparticles

2007 ◽  
Vol 121-123 ◽  
pp. 1221-1224 ◽  
Author(s):  
Ze Chao Di ◽  
Yan Hui Li ◽  
Xian Jia Peng ◽  
Zhao Kun Luan ◽  
Ji Liang
Keyword(s):  
Heat Treatment ◽  
Carbon Nanotubes ◽  
Drinking Water ◽  
Carbon Nanotube ◽  
Fluoride Concentration ◽  
Ceria Nanoparticles ◽  
Adsorption Effect ◽  
Fluoride Adsorption ◽  
Aligned Carbon Nanotubes ◽  
Potential Applications

Ceria nanoparticles supported on aligned carbon nanotubes (CeO2/ACNTs), a novel adsorbent for fluoride from drinking water, were prepared by chemical reaction of CeCl3 with NaOH on aligned carbon nanotube solution and subsequent heat treatment. The best fluoride adsorption effect of CeO2/ACNTs occurs at pH 4.0 ~ 9.0. The largest adsorption capacity of CeO2/ACNTs reaches 33.7 mg g-1 at an equilibrium fluoride concentration of 18.0 mg l-1 at pH 7.0. The experiment results suggest that CeO2/ACNTs have great potential applications in environmental protection.

scholarly journals Auxiliary Fiber Art Creation Design Based on Conductive Fiber Textile Wireless Structure Sensor

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Limei Ma
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Composite Films ◽  
Wood Cellulose ◽  
Multiwalled Carbon ◽  
Fiber Art ◽  
Multilayer Carbon Nanotubes ◽  
Fiber Materials ◽  
Optimal Reaction ◽  
Cellulose Composite

The integration of fiber materials into modern pottery creation is an attempt to explore its boundaries as a specific material and art form. Fiber materials, such as fabric and paper, are not resistant to high temperatures, and the clay attached to them can retain the surface texture, texture, and original three-dimensional form of the fiber materials intact during the kiln firing process, making up for the defects of single material molding and maintaining the visual effect of ultrathin and highly translucent works. The light source inside the work is more conducive to creating a specific artistic atmosphere. The purpose of this paper is to explore how fiber materials become the basis of ceramic works and the source of decorative expression, so that this expression and process can be systematically analyzed and interpreted in the application of ceramic art creation. Along with the rapid development of nanotechnology, electronics, and optical technology, people’s clothing fabrics have been increasing in demand in terms of function and appearance. This paper focuses on the research and development of fiber textiles from the field of science and technology and discusses the current status of fiber textiles and the possibility of combining fiber art with science and technology. In this paper, wood cellulose-multiwalled carbon nanotube/wood cellulose composite films were prepared, as well as wood cellulose films and wood cellulose/multiwalled carbon nanotube composite films. The optimal reaction time for the preparation of the films was 2 h, and the optimal reaction temperature was 70°C. Experimental results show that the dispersibility of multilayer carbon nanotubes in wood cellulose multilayer carbon nanotubes/wood cellulose composite films in wood cellulose multilayer carbon nanotubes composite films is superior. If the amount of multilayered carbon nanotubes was 3 wt%, the fracture point extension and accessibility of the wood cellulose multilayer carbon nanotubes/wood cellulose composite film are 12.2% and 106.7 MPa, respectively. It is 93.7%, respectively. 10.7% is higher than wood cellulose/multilayered carbon nanotube composite films.

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