Experimental Characterization And Simulation Of Carbon Nanotube Strain Sensing Films

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Experimental Characterization and Simulation of Carbon Nanotube Strain Sensing Films

Author : Nagendra Krishna Chaitanya Tummalapalli
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (14 download)

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Book Synopsis Experimental Characterization and Simulation of Carbon Nanotube Strain Sensing Films by : Nagendra Krishna Chaitanya Tummalapalli

Download or read book Experimental Characterization and Simulation of Carbon Nanotube Strain Sensing Films written by Nagendra Krishna Chaitanya Tummalapalli and published by . This book was released on 2016 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Nanotubes (CNTs) have excellent mechanical, electrical and electromechanical properties. These properties led to a lot of novel applications. Due to change in electrical properties under mechanical loading, these composites have potential applications in strain sensors, when these are fabricated as films. CNT-based films are commonly fabricated using different physical and chemical techniques based on the property requirements governing those applications. In this work, CNT films were prepared using wet chemical based methods and chemical vapor deposition techniques. Plasma chemical vapor deposition using microwave power is used in the first method to deposit films on silicon substrates, using Nickel film as a catalyst layer. The effect of different processing steps in this method, viz., hydrogen annealing, hydrogen plasma pre-growth treatment and MWCVD deposition properties on the film properties is studied in the first stage. In the second method, Carbon nanotube-polyurethane nanocomposite films of different loading proportions (1 to 8%) are prepared along with N-methyl-2-pyrrolidone (NMP) on different substrates using a spin coating. These film properties were analyzed using different characterization techniques. These studies demonstrated the optimization of the growth and preprocess parameters with respect to the structural phase, microstructure and conductivity of these films in both the methods. Simulation of the CNT sensor characteristics was performed using COMSOL Multiphysics software. Optical lithography is used to fabricate the sensor structures using CNT nanocomposite films. The results of these studies were discussed in detail.

Probing the Way of Combining Theoretical Calculation with Experimental Characterization on Deposited Single-walled Carbon Nanotube Film

Download Probing the Way of Combining Theoretical Calculation with Experimental Characterization on Deposited Single-walled Carbon Nanotube Film PDF Online Free

Author : SHULIN TAN
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Probing the Way of Combining Theoretical Calculation with Experimental Characterization on Deposited Single-walled Carbon Nanotube Film by : SHULIN TAN

Download or read book Probing the Way of Combining Theoretical Calculation with Experimental Characterization on Deposited Single-walled Carbon Nanotube Film written by SHULIN TAN and published by . This book was released on 2019 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The carbon nanotube has long been seen as a next-generation semiconductor due to its 1D nanostructure and superior electrical properties. However, the characterization of it remains a challenge due to its ultra small diameter. It is suggested that a combination of theoretical simulations and experimental characterization would be suitable to reduce the time and effort needed to probe the properties of the defect of it. In this thesis, both finite element simulation and multiple characterization techniques, namely Raman Spectroscopy, Raman Imaging, Scanning Electron Microscopy and Atomic Force Microscopy, are performed to probe the effect of misalignment on the properties of deposited carbon nanotubes. The result of finite element simulation shows that the misalignment of nanotubes would lead to a drop in the total current flow through the device and a concentration of electrical current on a single nanotube. Experiments are then set up to probe a way of characterizing this defect. The diameter and bandgap of the carbon nanotube obtained from characterization is also used in the simulation. It is revealed that computer simulation and characterization results could be combined.

Carbon Nanotube-Based Sensors

Author : Anindya Nag
Publisher : CRC Press
ISBN 13 : 1040020879
Total Pages : 355 pages
Book Rating : 4.0/5 (4 download)

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Book Synopsis Carbon Nanotube-Based Sensors by : Anindya Nag

Download or read book Carbon Nanotube-Based Sensors written by Anindya Nag and published by CRC Press. This book was released on 2024-05-02 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Nanotube-Based Sensors: Fabrication, Characterization, and Implementation highlights the latest research and developments on carbon nanotubes (CNTs) and their applications in sensors and sensing systems. It offers an overview of CNTs, including their synthesis, functionalization, characterization, and toxicology. It then delves into the fabrication and various applications of CNT-based sensors. FEATURES Defines the significance of different forms of CNT-based sensors synthesized for diverse engineering applications and compares the feasibility of their generation Helps readers evaluate different types of fabrication techniques to generate CNTs and their subsequent sensing Discusses fabrication of low-cost, efficient CNTs-based sensors that can be used for diverse applications and sheds light on synthesis methods for a range of printing techniques Highlights challenges and advances in security-related issues using CNTs-based sensors This book is aimed at researchers in the fields of materials and electrical engineering who are interested in the development of sensor technology for industrial, biomedical, and related applications.

Carbon Nanotubes

Author : Siva Yellampalli
Publisher : BoD – Books on Demand
ISBN 13 : 9533074973
Total Pages : 532 pages
Book Rating : 4.5/5 (33 download)

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Book Synopsis Carbon Nanotubes by : Siva Yellampalli

Download or read book Carbon Nanotubes written by Siva Yellampalli and published by BoD – Books on Demand. This book was released on 2011-07-20 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes are one of the most intriguing new materials with extraordinary properties being discovered in the last decade. The unique structure of carbon nanotubes provides nanotubes with extraordinary mechanical and electrical properties. The outstanding properties that these materials possess have opened new interesting researches areas in nanoscience and nanotechnology. Although nanotubes are very promising in a wide variety of fields, application of individual nanotubes for large scale production has been limited. The main roadblocks, which hinder its use, are limited understanding of its synthesis and electrical properties which lead to difficulty in structure control, existence of impurities, and poor processability. This book makes an attempt to provide indepth study and analysis of various synthesis methods, processing techniques and characterization of carbon nanotubes that will lead to the increased applications of carbon nanotubes.

Electromechanical Characterization of Carbon Nanotube Thin Films for Distributed Strain Sensing

Author : Yingjun Irene Zhao
Publisher :
ISBN 13 : 9781339066967
Total Pages : pages
Book Rating : 4.0/5 (669 download)

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Book Synopsis Electromechanical Characterization of Carbon Nanotube Thin Films for Distributed Strain Sensing by : Yingjun Irene Zhao

Download or read book Electromechanical Characterization of Carbon Nanotube Thin Films for Distributed Strain Sensing written by Yingjun Irene Zhao and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The growing demand of renewable energy has motivated many research developments related to lowering the cost-of-energy of wind. One way to reducing the cost-of-energy is to lower its operating and maintenance costs. Among the many components of a wind turbine system, the fiber-reinforced polymer composite wind blade can suffer from various damage modes induced by overloading, and harsh environments. While various structural health monitoring technologies exist and may be suitable for wind turbine blade monitoring, an in situ monitoring system may enhance the ability to detect material-level damage. Detecting the onset of turbine blade damage can facilitate condition-based maintenance and prevent large scale-structural failure. In this thesis, a sensor that can be integrated with fiber-reinforced polymer composites is proposed for structural health monitoring of wind turbine blades. A thin film fabricated by carbon nanotubes and latex is found to possess suitable electromechanical properties for strain sensing. When coupled with an electrical impedance tomography algorithm, the nanocomposite thin film can be used for spatial damage detection and measuring the distribution of strain in composites.

Synthesis and Characterization of a Carbon Nanotube Based Composite Strain Sensor

Author : Matthew Clayton Boehle
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.:/5 (952 download)

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Book Synopsis Synthesis and Characterization of a Carbon Nanotube Based Composite Strain Sensor by : Matthew Clayton Boehle

Download or read book Synthesis and Characterization of a Carbon Nanotube Based Composite Strain Sensor written by Matthew Clayton Boehle and published by . This book was released on 2016 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to more effectively monitor the health of composite structures, a fuzzy fiber strain sensor was created. The fuzzy fiber is a bundle of glass fibers with carbon nanotubes or nanofibers grown on the surface using a novel chemical vapor deposition process. The nanotube coating makes the fiber bundle conductive while the small conductive path increases sensitivity. The fuzzy fiber sensor can replace conventional metal foil strain gauges in composite applications. The sensor was first characterized by use of a micro-tension test to generate load vs. resistance plots to demonstrate the feasibility of the sensor. The fibers were then cast into epoxy dogbone specimens to enable testing with an extensometer to quantify its strain sensitivity. Sensors were then embedded in carbon fiber prepreg panels. Specimens were prepared to demonstrate their performance in a composite laminate typical of aerospace structures. A multi-axial specimen was constructed to test sensor response to longitudinal, transverse and off-axis loading cases. Cyclic tests were performed to check for hysteresis or non-reversible changes to the sensor. A finite element model was created to compare the experimental results to the expected behavior based on the Poisson effect.

Characterization of the Mechanical and Electromechanical Properties of Carbon Nanotube-latex Thin Films

Author : Long Wang
Publisher :
ISBN 13 : 9781369343168
Total Pages : pages
Book Rating : 4.3/5 (431 download)

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Book Synopsis Characterization of the Mechanical and Electromechanical Properties of Carbon Nanotube-latex Thin Films by : Long Wang

Download or read book Characterization of the Mechanical and Electromechanical Properties of Carbon Nanotube-latex Thin Films written by Long Wang and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The safe, reliable, and efficient operation of structural systems can be undermined by various damage modes. To identify and respond to structural damage in a timely fashion, technologies for structural health monitoring (SHM) have been extensively studied and widely applied in practice. In this context, strain sensors play a crucial role in evaluating structural performance, as they can provide insights about internal stresses within structural components. As compared to conventional rigid and locally implemented strain sensors, piezoresistive nanostructured materials provide considerable opportunities for developing flexible, light-weight, and densely distributed sensors or “sensing skins.” Although many types of nanomaterial-based strain sensors have been fabricated, most of them rely on complicated and expensive manufacturing procedures, which hinder their large-scale applications. To address the aforementioned limitations, this thesis proposes the development, optimization, and characterization of a type of spray-fabricated carbon nanotube (CNT)-based thin film strain sensor. By using spray coating or airbrushing, thin films can be coated and readily applied onto large structural surfaces. It was found that the mechanical and electrical properties of the nanocomposite films could be optimized by modifying CNT concentrations and conducting post-fabrication annealing. Overall, the CNT nanocomposite films possess favorable mechanical properties as well as stable and reversible electromechanical properties, rendering them promising candidates as strain sensors suitable for SHM applications.

Deposition and Characterization of Carbon Nanotubes (CNTs) Based Films for Sensing Applications

Author : Amila C. Dissanayake
Publisher :
ISBN 13 :
Total Pages : 144 pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis Deposition and Characterization of Carbon Nanotubes (CNTs) Based Films for Sensing Applications by : Amila C. Dissanayake

Download or read book Deposition and Characterization of Carbon Nanotubes (CNTs) Based Films for Sensing Applications written by Amila C. Dissanayake and published by . This book was released on 2015 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advent of carbon nanotubes has opened up lot of novel applications because of their unique electrical and mechanical properties. CNTs are well known material for its exceptional electrical, mechanical, optical, thermal and chemical properties. A single-wall nanotube ) can be either semiconducting, metallic or semi-metallic, based on its chirality and diameter. SWNTs can be used in transistor device as active channels due to high electron mobility, electrical interconnects, nano-scale circuits, field-emission displays, light-emitting devices and thermal heat sinks due to low resistivity, high current density and high thermal conductivity. Further, their high Young’s modulus and fracture stress is suitable for various sensing applications such as strain/pressure and use in chemical/biological sensors. This work mainly involves the deposition of CNT-based films following two different methods via a conventional microwave chemical vapor deposition and spinning CNT-composites, and explored the possibility of using CNT-based films in strain gauge applications. Deposited films are characterized and analyzed for their structure, microstructure, composition and electrical properties. Rutherford Backscattering Spectrometry, X-ray Reflectivity, Scanning Electron Microscopy, X-ray Diffraction, X-ray Photoelectron Spectroscopy, Atomic Force Microscopy and electrical impedance measurement techniques are used to characterize the films prepared by both the above mentioned methods. The synthesis/deposition process is improved based on the observed films properties. A carbon nanotube forest grown on the Si substrate with Ni as a catalyst using CVD system shows an amorphous nature due to loss of catalytic activity of Ni nano-islands. XPS and RBS data show Ni nano-particles diffused into the Si substrate and surface layer of Ni particles turns out to nickel silicide. The diffusion of Ni nano-particles and nickel silicide formation occurs due to annealing and longer plasma treatment. Because of annealing and plasma treatment, the phase of Ni changes from amorphous to hexagonal close packed with p63/mmc space group and cubic Fm-3m with plasma treatment time. Further, the role of Ni diffusion into silicon in the catalyzing CNT formation has been investigated and discussed further. Carbon nanotube-polymer nanocomposite films are synthesized using spin coating of a polyurethane and CNTs mixture. This produced porous films with the average pore size of around 10 micrometers. The electrical conductivity of the CNTs-polymer composites increases with the carbon nanotube loading, and composites show frequency independent conductivity as frequency increases. Generally, ac conductivity as a function of signal frequency for the above composites shows conductive behavior. The parallel RC-circuit model reveals that composites without any cross-linkers are uniform and homogenous. The composite with low carbon nanotube content with cross-linkers shows the same trend. But composites with higher carbon nanotube content with cross-linkers shows poor dispersion and agglomeration of carbon nanotubes.

Computational and Experimental Studies of Strain Sensitive Carbon Nanotube Films

Author :
Publisher :
ISBN 13 :
Total Pages : 171 pages
Book Rating : 4.:/5 (915 download)

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Book Synopsis Computational and Experimental Studies of Strain Sensitive Carbon Nanotube Films by :

Download or read book Computational and Experimental Studies of Strain Sensitive Carbon Nanotube Films written by and published by . This book was released on 2014 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Testing and Characterization of Carbon Nanotubes as Strain Sensors

Author : Juan D. Diaz
Publisher :
ISBN 13 :
Total Pages : 43 pages
Book Rating : 4.:/5 (775 download)

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Book Synopsis Testing and Characterization of Carbon Nanotubes as Strain Sensors by : Juan D. Diaz

Download or read book Testing and Characterization of Carbon Nanotubes as Strain Sensors written by Juan D. Diaz and published by . This book was released on 2011 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential of using carbon nanotube coated flexible cloth as strain gauges was studied. Samples were prepared by sonicating strips of cloth inside a 1mg/ml carbon nanotube in propylene carbonate solution. A dynamic mechanical analyzer was built that applied uniaxial cyclical strains to the samples and recorded the force and strain applied. The DMA also provided a constant voltage to the samples while recording the resistance response of the strain gauges. The samples were tested using the dynamic mechanical analyzer for their response to variables such as strain and time. The samples were successfully tested at strains ranging from 1% to 50%. The conductivity of the samples was measured. We studied the effects that a carboxylate and the sulfonate functional groups of the carbon nanotubes have on the strain sensors, the effect of the sonication time, and the effect that leaving the strain sensors inside the solution for different amount of times has on the strain sensors. It was discovered that the samples dried overtime, thus decreasing the conductivity of the samples and damaging the strain sensors. An encapsulation method was developed and studied to counter the drying effect. The results showed that the encapsulation method did delay the decaying of the samples. Moreover, it was concluded that the sulfonate group had higher changes in resistance than the carboxylate group. While increased sonication time did not seem to have a measurable effect on the resistance of the sulfonate CNT samples, this was not true for the carboxylate group CNTs. The carboxylate group CNTs seemed to have a higher initial resistance with longer sonication time and a lower resistance with increasing time sitting in the solution. Overall, it was concluded that carbon nanotubes have a promising potential as macro level strain sensors for high-elongation applications but more development is yet to be done.

Health Monitoring of Aerospace Structures

Author : Wieslaw Staszewski
Publisher : John Wiley & Sons
ISBN 13 : 9780470843406
Total Pages : 290 pages
Book Rating : 4.8/5 (434 download)

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Book Synopsis Health Monitoring of Aerospace Structures by : Wieslaw Staszewski

Download or read book Health Monitoring of Aerospace Structures written by Wieslaw Staszewski and published by John Wiley & Sons. This book was released on 2004-02-13 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing quality research for the reader, this title encompasses all the recent developments in smart sensor technology for health monitoring in aerospace structures, providing a valuable introduction to damage detection techniques. Focussing on engineering applications, all chapters are written by smart structures and materials experts from aerospace manufacturers and research/academic institutions. This key reference: Discusses the most important aspects related to smart technologies for damage detection; this includes not only monitoring techniques but also aspects related to specifications, design parameters, assessment and qualification routes. Presents real case studies and applications; this includes in-flight tests; the work presented goes far beyond academic research applications. Displays a balance between theoretical developments and engineering applications

Polymeric Nanocomposite Materials for Sensor Applications

Author : Jyotishkumar Parameswaranpillai
Publisher : Elsevier
ISBN 13 : 0323972748
Total Pages : 570 pages
Book Rating : 4.3/5 (239 download)

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Book Synopsis Polymeric Nanocomposite Materials for Sensor Applications by : Jyotishkumar Parameswaranpillai

Download or read book Polymeric Nanocomposite Materials for Sensor Applications written by Jyotishkumar Parameswaranpillai and published by Elsevier. This book was released on 2022-11-16 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric Nanocomposite Materials for Sensor Applications covers all the important aspects of polymer composite-based sensors, from fundamentals to fabrication. Key chapters focus on the materials used for sensors and their characterization, properties, fabrication and classification. Various applications of polymeric sensors are also discussed in detail. This book is an essential reference resource, not only for the materials scientist, but also for researchers, academics, technologists and students working in the sensor technology industry. In modern society, sensors are used in electronics, food packaging, construction, automobile and aerospace applications. The advancement of smart technologies has increased their usage because of their affordability and reliability. Among the materials used for the fabrication of sensors, polymer composites are the most preferred because they are lightweight, versatile, low cost and easy to process. Discusses fundamentals, classification, recent progress, and the current status of polymer nanocomposites in sensing applications Includes coverage of materials and their application-specific modeling Addresses safety issues and environmental degradation Includes broad coverage of a wide range of engineering applications, including food, safety, healthcare, automotive and aerospace Covers pressure sensors, gas sensors, pH sensors, ion selective sensors, alcohol sensors, humidity sensors, aromatic small molecule sensors, enzyme sensors, immunosensors, strain sensors and electrochemical sensors

Non-contact Characterization of Carbon Nanotube Based Strain Sensors Using Millimeter Waves

Author : Seyda Naz Alasahin
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.3/5 (514 download)

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Book Synopsis Non-contact Characterization of Carbon Nanotube Based Strain Sensors Using Millimeter Waves by : Seyda Naz Alasahin

Download or read book Non-contact Characterization of Carbon Nanotube Based Strain Sensors Using Millimeter Waves written by Seyda Naz Alasahin and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotubes (CNTs) are unique tubular structures with high thermal and electrical conductivity, distinct optical characteristics, and high mechanical stiffness and strength. Carbon nanotube (CNT) composites have widely been used as strain sensors because of their electrical-mechanical coupling behavior. Typically, these piezoresistive sensors require direct measurement of electrical resistance change using an external source connected with wires. This research introduces a new, non-contact measurement method to detect the change in electrical conductivity of carbon nanotube-based strain sensors using high-frequency millimeter wave technology. By analyzing the transmission coefficient from the textile-based CNT composite, we were able to observe the piezoresistive effect. Sensors were characterized over a broad frequency band, from 82 GHz to 100 GHz, with applied strain up to 40%. Fabrics were coated with a sizing composed of an aqueous dispersion of multi-walled CNTs. Sets of fabrics with different CNT concentration were examined to investigate the sensitivity, polarization effects and isotropy properties of manufactured sensors under three different case studies.

Fabrication and Characterization of Carbon Nanotube Thin-films for Gas Sensing Applications

Author : Ahmed Abdelhalim
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (934 download)

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Book Synopsis Fabrication and Characterization of Carbon Nanotube Thin-films for Gas Sensing Applications by : Ahmed Abdelhalim

Download or read book Fabrication and Characterization of Carbon Nanotube Thin-films for Gas Sensing Applications written by Ahmed Abdelhalim and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advances in Multiphysics Simulation and Experimental Testing of MEMS

Author : Attilio Frangi
Publisher : World Scientific
ISBN 13 : 1860948626
Total Pages : 504 pages
Book Rating : 4.8/5 (69 download)

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Book Synopsis Advances in Multiphysics Simulation and Experimental Testing of MEMS by : Attilio Frangi

Download or read book Advances in Multiphysics Simulation and Experimental Testing of MEMS written by Attilio Frangi and published by World Scientific. This book was released on 2008 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume takes a much needed multiphysical approach to the numerical and experimental evaluation of the mechanical properties of MEMS and NEMS. The contributed chapters present many of the most recent developments in fields ranging from microfluids and damping to structural analysis, topology optimization and nanoscale simulations. The book responds to a growing need emerging in academia and industry to merge different areas of expertise towards a unified design and analysis of MEMS and NEMS.

Carbon Nanotube-Based Sensors

Author :
Publisher :
ISBN 13 : 9781032452326
Total Pages : 0 pages
Book Rating : 4.4/5 (523 download)

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Book Synopsis Carbon Nanotube-Based Sensors by :

Download or read book Carbon Nanotube-Based Sensors written by and published by . This book was released on 2024-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: ""Carbon Nanotube-Based Sensors" highlights the latest research and developments on carbon nanotubes (CNTs) and their applications in sensors and sensing systems. It offers an overview of CNTs, including their synthesis, functionalization, characterization, and toxicology. It then delves into the fabrication and various applications of CNT-based sensors. This book is aimed at researchers in the fields of materials and electrical engineering who are interested in the development of sensor technology for industrial, biomedical, and related applications"--

Electromagnetic Characterization of Carbon Nanotube Films Subject to an Oxidative Treatment at Elevated Temperature (Preprint).

Author :
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (713 download)

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Book Synopsis Electromagnetic Characterization of Carbon Nanotube Films Subject to an Oxidative Treatment at Elevated Temperature (Preprint). by :

Download or read book Electromagnetic Characterization of Carbon Nanotube Films Subject to an Oxidative Treatment at Elevated Temperature (Preprint). written by and published by . This book was released on 2010 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electromagnetic characterization of carbon nanotube (CNT) films fabricated by thermal decomposition of silicon carbide (SiC) has been performed. Purification and/or uncapping treatment conditions at an elevated temperature of 400 deg C under flowing oxygen or carbon dioxide have been studied. A near field microwave microscope was used to measure the real and imaginary parts of the complex permittivity of CNT films through the frequency shift and the change in reciprocal quality factor between two extreme positions of an evanescent microwave probe-tip (in contact with the sample, and away from interaction with it). A theoretical two-point model was proposed to confirm experimental data, which showed poor conductivity of the CNT film as grown but has slight improvement after 40-minute treatment.