Academic literature on the topic 'Functionalized carbon'

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Journal articles on the topic "Functionalized carbon"

1

Gautam, S. S., G. P. Satsangi, and V. R. Satsangi. "Chemical Synthesis, Functionalization and Characterization of Multiwalled Carbon Nanotubes." Journal of Nanoscience and Technology 6, no. 3 (September 14, 2020): 905–7. http://dx.doi.org/10.30799/jnst.307.20060302.

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This research work is attempted to synthesize, functionalize and to characterize multi walled carbon nanotubes (MWCNTs). The synthesis of multi walled carbon nanotubes was done by chemical vapor deposition (CVD) method. The characterization of MWCNTs was done by adopting the following techniques such as field emission scanning electron microscope, X-ray diffraction, Fourier-transform infrared spectroscopy. The crystalline quality of MWCNTs was confirmed from the analysis of X-ray diffraction pattern. FE-SEM image obtained for MWCNTs and functionalized MWCNTs and it has been seen that dimeter of most of the MWCNTs lies around 90 nm, where as, functionalized MWCNTs diameter is smaller i.e., around 35 nm only. Fourier-transform infrared spectroscopy study confirmed the presence of –COOH and H- bonded –OH in functionalized MWCNTs.
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Liang, Weibing, Ming Chen, Lin Li, Liqiang Yan, Xiuli Wang, Xiongzhi Wu, and Chenghong Lei. "Polyethyleneimine-Functionalized Carbon Nanotubes Enabling Potent Antimycotic Activity of Lyticase." Polymers 14, no. 5 (February 28, 2022): 959. http://dx.doi.org/10.3390/polym14050959.

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In this work, the positively-charged polymer polyethyleneimine was used to functionalize carbon nanotubes and activated carbon to load antimycotic enzyme lyticase. Interestingly, polyethyleneimine played a dual role functionalizing carbon materials to synergistically enhance antimycotic activity of loaded lyticase as well as exhibiting its own apparent antimycotic activity, where the enhanced enzymatic activity of loaded lyticase on functionalized carbon nanotubes was more than 2.8 times as high as the activity of free enzyme in solution. The actual activity of loaded lyticase on functionalized carbon nanotubes was applied with Penicillium janthinellum, exhibiting much faster digesting lysis of the bacteria in comparison with free lyticase. The synergistic and potent antimycotic activities from combined action of antimycotic lyticase and polyethyleneimine on carbon nanotubes provides a new antimycotic protection for medicine, food industry, and other biochemical processes.
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Wang, Tzong-Liu, Chin-Chung Yu, Chien-Hsin Yang, Yeong-Tarng Shieh, Yu-Zen Tsai, and Na-Fu Wang. "Preparation, Characterization, and Properties of Polyurethane-Grafted Multiwalled Carbon Nanotubes and Derived Polyurethane Nanocomposites." Journal of Nanomaterials 2011 (2011): 1–9. http://dx.doi.org/10.1155/2011/814903.

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We incorporated hydroxyl groups into the polyurethane backbone and then used the “grafting to” approach to functionalize the multiwalled carbon nanotubes (MWNTs) via the esterification reaction between MWNTs and segmented polyurethanes (PUs). X-ray photoelectron spectroscopy (XPS) spectra showed that the sidewalls of MWNTs had been functionalized with acid treatment, and the amount of COOH increased with increasing acid treatment time. FTIR spectra further confirmed that PU was covalently attached to the sidewalls of MWNTs. The functionalized acid amount and the grafted PU amount were determined by thermogravimetric analyses (TGAs). Comparative studies based on SEM images of the PU-functionalized and chemically defunctionalized MWNT samples also revealed the covalent coating character. Dynamic mechanical analysis (DMA) of nanocomposite films prepared from PU and PU-functionalized MWNTs showed enhanced mechanical properties and increased soft segment . Tensile properties indicated that PU-functionalized MWNTs were effective reinforcing fillers for the polyurethane matrix.
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Hong, Mi-Kyoung, Woong-Ki Choi, Jong-Hyun Park, Yun-Su Kuk, Byoung-Suhk Kim, and Min-Kang Seo. "Relationship Between Functionalized Multi-Walled Carbon Nanotubes and Damping Properties of Multi-Walled Carbon Nanotubes/Carbon Fiber-Reinforced Plastic Composites for Shaft." Journal of Nanoscience and Nanotechnology 20, no. 11 (November 1, 2020): 6862–70. http://dx.doi.org/10.1166/jnn.2020.18810.

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The mechanical properties and damping behavior of carbon fiber-reinforced plastic composites with functionalized multi-walled carbon nanotubes were examined. The functionalized multi-walled carbon nanotubes were blended with epoxy resins to prepare multi-walled carbon nanotubes/carbon fiber-reinforced plastic composites. The dispersion properties of functionalized multi-walled carbon nanotubes in epoxy resins were examined using surface free energy. The mechanical properties of functionalized multi-walled carbon nanotubes/carbon fiber-reinforced plastic composites were measured by interlaminar shear strength and torsion strength. The functionalized multi-walled carbon nanotubes/carbon fiber-reinforced plastic composites had superior mechanical properties due to the increase in dispersion properties of functionalized multi-walled carbon nanotubes in epoxy resins. However, the tan delta values of damping behavior, analyzed by dynamic mechanical analysis, varied with the type of functional groups of functionalized multi-walled carbon nanotubes. The composites obtained from functionalized multi-walled carbon nanotubes obtained through spermidine amidation reaction and carbon fiber-reinforced plastic showed excellent tan delta values due to the flexible segments in side chains.
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Janudin, Nurjahirah, Luqman Chuah Abdullah, Norli Abdullah, Faizah Md Yasin, Norshafiqah Mohamad Saidi, and Noor Azilah Mohd Kasim. "Comparison and Characterization of Acid Functionalization of Multi Walled Carbon Nanotubes Using Various Methods." Solid State Phenomena 264 (September 2017): 83–86. http://dx.doi.org/10.4028/www.scientific.net/ssp.264.83.

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Functionalization of multiwalled carbon nanotubes (MWCNT) is one of several methods used to improve the compatibility of CNT. Even though acid functionalised method is effective, the strong acids such as H2SO4/HNO3 were normally employed and long hours of sonication is used to disperse the CNTs in the solution frequently can damage the nanotube, thus limiting their great performance as mechanical and electrical reinforcements. Here we are reporting comparison between three methods used in acid functionalized treatments of MWCNT. The first method, MWCNT was functionalized using ultra sonication water bath and followed by reflux (Method A). The second method, MWCNT was functionalized using ultrasonication water bath only for 2 hours (Method B). Finally, the third method MWCNT was functionalized using ultrasonication water bath only for 6 hours (Method C). Raman spectroscopy measurements were used to examine the general relationship between the chemical treatment and the amount of non-graphitic carbon. Electron microscopy analysis revealed that MWCNT functionalized using Method C suffered the highest degree degradation such as, nanotube shortening and additional defect generation in the graphitic network. Method B proved to be the most effective for this aim.
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Li, Jiang Tao. "A Mild Method Prepared Carboxy Carbon Nanocage." Advanced Materials Research 560-561 (August 2012): 742–46. http://dx.doi.org/10.4028/www.scientific.net/amr.560-561.742.

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Here we report for on the functionalization of ordered cage-type mesoporous carbons through a simple oxidation using ammonium perchlorate (AP). The degree of functionalization can be easily controlled by the simple adjustment of the oxidation parameters such as oxidation time, AP concentration and oxidation temperature. The functionalized materials have been unambiguously characterized by XRD, nitrogen adsorption, FT-IR and TEM measurements. It has been found that the functionalized carbon nanocage, ‘‘carboxy carbon nanocage’’.
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Song, Shiqiang, Chaoying Wan, and Yong Zhang. "Non-covalent functionalization of graphene oxide by pyrene-block copolymers for enhancing physical properties of poly(methyl methacrylate)." RSC Advances 5, no. 97 (2015): 79947–55. http://dx.doi.org/10.1039/c5ra14967c.

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Pyrene-functionalized poly(methyl methacrylate)-block-polydimethylsiloxane (Py-PMMA-b-PDMS) copolymers were synthesized via ARGET ATRP method and further used to functionalize GO through the π–π interaction between pyrene and the carbon sheets.
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Haghmoradkhani, Ali, Alireza Pardakhti, and Mohammad Ali Zahed. "Evaluation of adsorption efficiency of activated carbon functionalized with methyl diethanolamine in carbon dioxide gas." Environmental Health Engineering and Management 9, no. 3 (August 14, 2022): 261–70. http://dx.doi.org/10.34172/ehem.2022.27.

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Background: Adsorption is a process in which some of the components in the fluid phase, are selectively transferred to the surface of the porous solid particles in the filled bed, which is called the adsorbent. The aim of this study was to examine the adsorption effectiveness of CO2 by activated carbon functionalized with methyl diethanolamine (MDEA), as well as the effects of adsorption temperature, the total pressure of adsorption, and mass of adsorbent. Methods: Activated carbon was first produced using the desired biomasses and suitable activated carbon was chosen. The activated carbon was then functionalized with MDEA amination method. The crystal structure of adsorbents was studied using X-ray diffraction (XRD) methods. In addition, the porosity, specific surface area and structure of prepared activated carbon were measured using BET techniques. Finally, the morphology and strength of the functional groups were measured using Field emission scanning electron microscopy (FESEM) and Fourier-transform infrared spectroscopy (FTIR) analyses. Results: The findings of the FESEM and BET analyses for functionalized activated carbon revealed that the specific surface area of the adsorbent increased throughout the chemical and physical modification process, resulting in a BET amount of 725/84 m2 /g. The results showed that the selectivity of the functionalized activated carbon is greater than that of the non-functionalized adsorbent. Conclusion: The adsorption capacity of functionalized activated carbon was 3.98 mmol CO2 g-1 sorbent, compared to 2.587 mmol CO2 g-1 sorbent in the non-functionalized carbon, indicating a 35% improvement in the efficiency of the functionalized sample. According to the findings of the desorption experiments, functionalized carbon shows a 25% decrease in CO2 adsorption efficiency after 20 desorption steps.
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Breitwieser, Andreas, Philipp Siedlaczek, Helga Lichtenegger, Uwe B. Sleytr, and Dietmar Pum. "S-Layer Protein Coated Carbon Nanotubes." Coatings 9, no. 8 (August 2, 2019): 492. http://dx.doi.org/10.3390/coatings9080492.

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Carbon nanotubes (CNTs) have already been considered for medical applications due to their small diameter and ability to penetrate cells and tissues. However, since CNTs are chemically inert and non-dispersible in water, they have to be chemically functionalized or coated with biomolecules to carry payloads or interact with the environment. Proteins, although often only randomly bound to the CNT surface, are preferred because they provide a better biocompatibility and present functional groups for binding additional molecules. A new approach to functionalize CNTs with a closed and precisely ordered protein layer is offered by bacterial surface layer (S-layer) proteins, which have already attracted much attention in the functionalization of surfaces. We could demonstrate that bacterial S-layer proteins (SbpA of Lysinibacillus sphaericus CCM 2177 and the recombinant fusion protein rSbpA31-1068GG comprising the S-layer protein and two copies of the IgG binding region of Protein G) can be used to disperse and functionalize oxidized multi walled CNTs. Following a simple protocol, a complete surface coverage with a long-range crystalline S-layer lattice can be obtained. When rSbpA31-1068GG was used for coating, the introduced functionality could be confirmed by binding gold labeled antibodies via the IgG binding domain of the fusion protein. Since a great variety of functional S-layer fusion proteins has already been described, our new technology has the potential for a broad spectrum of functionalized CNTs.
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Song, Yang, Xiongwu Kang, Nathaniel B. Zuckerman, Bruce Phebus, Joseph P. Konopelski, and Shaowei Chen. "Ferrocene-functionalized carbon nanoparticles." Nanoscale 3, no. 5 (2011): 1984. http://dx.doi.org/10.1039/c0nr00953a.

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Dissertations / Theses on the topic "Functionalized carbon"

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Vurur, O. F., and I. E. Serhatli. "Functionalized Multiwalled Carbon Nanotubes for UV Coating." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35294.

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We propose a strategy to enhance the photocurable properties of the multi walled carbon nanotube (Mwcnt) / binder films through control of the intermolecular interaction between the nanotube and the binder material. For this aim, photosensitive functionalized carbon nanotube was synthesized and by mixing binder, it was cured under UV-light. Epoxy acrylate resin was used as binder and reactive diluents such as HDDA, DPGDA were added as both crosslinker and viscosity extender. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35294
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2

Rauf, Hendrik. "Metallic Ground State of Functionalized Carbon Nanotubes." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1184153423397-79783.

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Single-wall carbon nanotubes (SWCNTs) are a fascinating material because they exhibit many outstanding properties. Due to their unique geometric structure, they are a paradigm for one-dimensional systems. Furthermore, depending on their chirality, they can be either metallic or semiconducting. The SWCNT are arranged in bundles of some ten nanotubes with a random distribution of semiconducting and metallic tubes. They are thus one-dimensional objects embedded in a three-dimensional arrangement, the bundles. In this thesis, the metallic ground state of one-dimensional (1D) and three-dimensional (3D) systems is investigated on the basis of SWCNTs, using angle-integrated photoemission spectroscopy. In particular, a transition from a 1D to a 3D metallic system, induced by a charge transfer, is studied on SWCNTs and C60 peapods. In general, the metallic ground state of materials is greatly influenced by correlation effects. In classical three-dimensional metals, electron-electron interaction mainly leads to a renormalization of the charge carrier properties (e.g. effective mass), as described in Landau's Fermi liquid theory. One-dimensional metals are influenced to a greater extent by interactions. In fact, the Landau-quasiparticle picture breaks down due to the Peierls instability. Instead, one-dimensional metals are described by Tomonaga-Luttinger liquid (TLL) theory which predicts unusual properties such as spin-charge separation and non-universal power laws in some physical properties such as the electronic density of states (DOS). Angle-integrated photoemission spectroscopy provides direct access to the DOS and as such directly addresses the power law renormalization of a TLL. It is first shown, that the bundles of single-wall carbon nanotubes indeed exhibit a power law scaling of the electronic density of states is observed as it is expected from TLL theory. The main part of the thesis is devoted to the investigation of the metallic ground state of SWCNTs upon functionalization. In general, functionalization is a controlled modification of the structural and/or electronic properties of SWCNT. It can be carried out e.g. by doping with electron donors or acceptors, by filling the nanospace inside the tubes with molecules or by substituting carbon atoms. First, the behavior of the SWCNT upon chemical doping was probed. The overall modification of the electronic band structure can be explained well by a rigid band shift model. The one-dimensional character of the metallic tubes in the bundle is retained at low doping, but when the semiconducting tubes in the sample are also rendered metallic by the charge transfer, a Fermi edge emerges out of the power law renormalization of the spectral weight, signifying a transition to a three-dimensional metallic behavior. This can be explained by an increased interaction between the tubes in the bundle. A crossover from a Tomonaga-Luttinger liquid to a Fermi liquid is observed. The filling of SWCNTs with C60 molecules leads to the formation of so-called peapods. It raises questions concerning the role of the additional bands originating from the C60 filling in the one-dimensional system. In the pristine state, the states of the C60 filling were found to have no influence on the metallic ground state. The TLL power law scaling of the density of states is observed. The overall interaction between the SWCNT host and the C60 filling is small. Upon doping however, the modified band structure leads to a qualitative change in the crossover from a TLL to a Fermi liquid. Upon doping, also states in the conduction band of the C60 are filled. The evolution of the power law scaling at intermediate doping can be interpreted as an opening of an additional conduction channel of one-dimensional metallic chains of C60 inside the tubes. This is in good agreement with transport experiments. Upon further doping, a Fermi edge similar to the highly doped SWCNTs is observed.
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Penmatsa, Varun. "Functionalized Carbon Micro/Nanostructures for Biomolecular Detection." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/739.

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Advancements in the micro-and nano-scale fabrication techniques have opened up new avenues for the development of portable, scalable and easier-to-use biosensors. Over the last few years, electrodes made of carbon have been widely used as sensing units in biosensors due to their attractive physiochemical properties. The aim of this research is to investigate different strategies to develop functionalized high surface carbon micro/nano-structures for electrochemical and biosensing devices. High aspect ratio three-dimensional carbon microarrays were fabricated via carbon microelectromechanical systems (C-MEMS) technique, which is based on pyrolyzing pre-patterned organic photoresist polymers. To further increase the surface area of the carbon microstructures, surface porosity was introduced by two strategies, i.e. (i) using F127 as porogen and (ii) oxygen reactive ion etch (RIE) treatment. Electrochemical characterization showed that porous carbon thin film electrodes prepared by using F127 as porogen had an effective surface area (Aeff 185%) compared to the conventional carbon electrode. To achieve enhanced electrochemical sensitivity for C-MEMS based functional devices, graphene was conformally coated onto high aspect ratio three-dimensional (3D) carbon micropillar arrays using electrostatic spray deposition (ESD) technique. The amperometric response of graphene/carbon micropillar electrode arrays exhibited higher electrochemical activity, improved charge transfer and a linear response towards H2O2 detection between 250μM to 5.5mM. Furthermore, carbon structures with dimensions from 50 nano-to micrometer level have been fabricated by pyrolyzing photo-nanoimprint lithography patterned organic resist polymer. Microstructure, elemental composition and resistivity characterization of the carbon nanostructures produced by this process were very similar to conventional photoresist derived carbon. Surface functionalization of the carbon nanostructures was performed using direct amination technique. Considering the need for requisite functional groups to covalently attach bioreceptors on the carbon surface for biomolecule detection, different oxidation techniques were compared to study the types of carbon–oxygen groups formed on the surface and their percentages with respect to different oxidation pretreatment times. Finally, a label-free detection strategy using signaling aptamer/protein binding complex for platelet-derived growth factor oncoprotein detection on functionalized three-dimensional carbon microarrays platform was demonstrated. The sensor showed near linear relationship between the relative fluorescence difference and protein concentration even in the sub-nanomolar range with an excellent detection limit of 5 pmol.
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Rauf, Hendrik. "Metallic Ground State of Functionalized Carbon Nanotubes." Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A24959.

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Single-wall carbon nanotubes (SWCNTs) are a fascinating material because they exhibit many outstanding properties. Due to their unique geometric structure, they are a paradigm for one-dimensional systems. Furthermore, depending on their chirality, they can be either metallic or semiconducting. The SWCNT are arranged in bundles of some ten nanotubes with a random distribution of semiconducting and metallic tubes. They are thus one-dimensional objects embedded in a three-dimensional arrangement, the bundles. In this thesis, the metallic ground state of one-dimensional (1D) and three-dimensional (3D) systems is investigated on the basis of SWCNTs, using angle-integrated photoemission spectroscopy. In particular, a transition from a 1D to a 3D metallic system, induced by a charge transfer, is studied on SWCNTs and C60 peapods. In general, the metallic ground state of materials is greatly influenced by correlation effects. In classical three-dimensional metals, electron-electron interaction mainly leads to a renormalization of the charge carrier properties (e.g. effective mass), as described in Landau's Fermi liquid theory. One-dimensional metals are influenced to a greater extent by interactions. In fact, the Landau-quasiparticle picture breaks down due to the Peierls instability. Instead, one-dimensional metals are described by Tomonaga-Luttinger liquid (TLL) theory which predicts unusual properties such as spin-charge separation and non-universal power laws in some physical properties such as the electronic density of states (DOS). Angle-integrated photoemission spectroscopy provides direct access to the DOS and as such directly addresses the power law renormalization of a TLL. It is first shown, that the bundles of single-wall carbon nanotubes indeed exhibit a power law scaling of the electronic density of states is observed as it is expected from TLL theory. The main part of the thesis is devoted to the investigation of the metallic ground state of SWCNTs upon functionalization. In general, functionalization is a controlled modification of the structural and/or electronic properties of SWCNT. It can be carried out e.g. by doping with electron donors or acceptors, by filling the nanospace inside the tubes with molecules or by substituting carbon atoms. First, the behavior of the SWCNT upon chemical doping was probed. The overall modification of the electronic band structure can be explained well by a rigid band shift model. The one-dimensional character of the metallic tubes in the bundle is retained at low doping, but when the semiconducting tubes in the sample are also rendered metallic by the charge transfer, a Fermi edge emerges out of the power law renormalization of the spectral weight, signifying a transition to a three-dimensional metallic behavior. This can be explained by an increased interaction between the tubes in the bundle. A crossover from a Tomonaga-Luttinger liquid to a Fermi liquid is observed. The filling of SWCNTs with C60 molecules leads to the formation of so-called peapods. It raises questions concerning the role of the additional bands originating from the C60 filling in the one-dimensional system. In the pristine state, the states of the C60 filling were found to have no influence on the metallic ground state. The TLL power law scaling of the density of states is observed. The overall interaction between the SWCNT host and the C60 filling is small. Upon doping however, the modified band structure leads to a qualitative change in the crossover from a TLL to a Fermi liquid. Upon doping, also states in the conduction band of the C60 are filled. The evolution of the power law scaling at intermediate doping can be interpreted as an opening of an additional conduction channel of one-dimensional metallic chains of C60 inside the tubes. This is in good agreement with transport experiments. Upon further doping, a Fermi edge similar to the highly doped SWCNTs is observed.
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Pokhrel, Sewa. "FISCHER- TROPSCH SYNTHESIS ON FUNCTIONALIZED CARBON NANOTUBES." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1408.

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The aim of this research was to investigate the role of chemical functionalization on carbon nanotubes surfaces and its effect on FT catalysis. Multi walled carbon nanotubes (MWNT) were first treated with acid (HCl) to remove the residual metal particles and were then functionalized using H2O2 and HNO3 to introduce oxygen-containing groups to the MWNT surface. These treatments also add defects on MWNT surface. Morphological analyses were performed on the MWNT samples with TEM and it was found that the peroxide and acid treated MWNTs showed an increase oxygen functional groups and created additional surface defects on the MWNTs. Results of FT experiments showed enhanced CO conversion, FT activity and product selectivity towards liquid hydrocarbons due to functionalization. The liquid selectivity was found to be significantly high for H2O2 treated catalyst. HNO3 treated catalyst had highest activity although selectivity to methane and CO2 was found higher than the H2O2 treated catalyst. It was observed that the chemical treatments increase the carbon chain length of the produced hydrocarbons. While comparing hydrocarbon distribution of as-produced and H2O2 treated MWNT, it was found that carbon-chain length increases for peroxide treated catalyst. Along with as-produced and functionalized nanotube, FT experiments were also conducted using B-doped sponge, un-doped sponge and N-doped CNT catalyst. B-doped sponge showed enhanced CO conversion and FT activity as compared to un-doped sponge. Conversion and product selectivity were found to be affected by temperature when test was conducted with N-CNT. Operating conditions like temperature, syngas feed flow rate and syngas ratio were also to impact the FT performance.
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Yang, Lin. "Functionalized double-walled carbon nanotubes for integrated gas sensors." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30254/document.

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Nous proposons dans ce travail une méthode robuste et bas-coût afin de fabriquer des détecteurs de gaz à base de Nanotubes de Carbone bi-parois (DWCNTs) chimiquement fonctionnalisés. Ces nano-objets (DWCNTs) sont synthétisés par dépôt catalytique en phase vapeur (CCVD), puis purifiés avant d'être oxydés ou bien fonctionnalisés par des terminaisons fluorées ou aminées. Les dispositifs de détection électriques ont été fabriqués par lithographie douce en utilisant un pochoir de PDMS (Poly-DiMethyl Siloxane) et un dépôt en phase liquide à la pipette d'une suspension aqueuse contenant les nanotubes fonctionnalisés, rinçage puis séchage à l'azote sec. Chaque dispositif (1 cm X 2 cm) est équipé d'un jeu de 7 résistors à base de DWCNTs. Chaque résistor peut accueillir des nanotubes fonctionnalisés par une entité chimique différente afin de cibler un gaz spécifique, permettant ainsi une détection multiplexée. En raison de leur faible encombrement et la possibilité de les fabriquer sur tout type de substrat y compris des substrats souples, ces détecteurs pourraient être utilisés pour une large gamme d'applications et notamment les détecteurs de gaz portatifs et intégrés. La résistance électrique des résistors s'avère décroître avec la température suggérant une conduction électrique gouvernée par l'effet tunnel et les fluctuations au sein du tapis désordonné de nanotubes de carbone. Nous avons cependant montré dans ce travail que pour des applications réelles de détection de gaz, une régulation thermique des dispositifs n'est pas nécessaire car les variations de résistance engendrées par l'adsorption de molécules de gaz sont significativement plus grandes que les variations causées par de possibles fluctuations de température. Les dispositifs produits présentent un caractère métallique à température ambiante et pour des applications de détection de gaz nous avons sélectionné des dispositifs présentant des résistances inférieures à 100 kO. Le principe de base de la détection de gaz étant basé sur la mesure directe de la résistance électrique du dispositif, la consommation électrique de ces dispositifs reste faible (<1 µW). La réponse des dispositifs à base de nanotubes de carbone non fonctionnalisés aux analytes testés (éthanol, acétone, ammoniac et vapeur d'eau) est faible. Les nanotubes de carbone fonctionnalisés présentent quant à eux, une réponse modérée à la vapeur d'eau, à l'éthanol et à l'acétone mais montrent une sensibilité excellente à l'ammoniac. En particulier, les nanotubes de carbone oxydés se sont avérés capables de détecter des concentrations sub-ppm d'ammoniac en présence de vapeur d'eau en excès et à température ambiante et ont montré une grande stabilité dans le temps même pour des expositions de gaz répétées. Nous pensons que les groupes chimiques fonctionnels ancrés à la surface des nanotubes de carbone modifient les interactions entre les molécules de gaz et les nanotubes et que le transfert de charges induit provoque les modifications de la conductance électrique du système
We have successfully fabricated gas sensors based on chemically functionalized double-wall carbon nanotubes (DWCNTs) using a robust and low cost process. The DWCNTs were synthesized by catalytic chemical vapor deposition (CCVD) method. They were then purified before functionalization (oxidation, amination, and fluorination). The sensor devices were fabricated by soft lithography using PDMS (Poly-DiMethylSiloxane) stencils and liquid phase pipetting of a suspension of chemically functionalized DWCNTs in deionized water, rinsing and finally drying in a nitrogen flow. Each device (1 cm x 2 cm) is equipped with a set of 7 DWCNT based resistors. Each resistor can accommodate a precise chemical functionalization for targeting a specific gas species, allowing a multiplexed (up to 7) detection. Due to their small size and the possibility to fabricate them on soft substrates, they could be used for many kinds of applications including wearable devices. The electrical resistance of the produced resistors turned out to decrease with temperature, suggesting fluctuations induced tunneling conduction through the disordered network of metallic nanotubes. However, we have shown in our work that for realistic applications, gas sensing can be achieved without any temperature regulation of our devices, because the variations of electrical conductance caused by gas molecules adsorption are significantly larger than those caused by possible temperature fluctuations. The as fabricated devices exhibit at room temperature a metallic conducting behavior. Devices with a resistance less than 100 kO were selected for gas detection. Because the sensing principle is based on the direct measurement of the resistance, our scheme ensures low power consumption (<1 µW). Raw (not functionalized) DWCNTs-based gas sensors exhibited a low sensitivity to the tested analytes, including ethanol, acetone, ammonia and water vapor. Functionalized DWCNTs-based gas sensors exhibited a moderate sensitivity to ethanol, acetone and water vapor but the response to ammonia, even in the presence of additional water vapor, was excellent. In particular, oxidized DWCNTs based gas sensors exhibited a high stability in the case of prolonged and repeated gas exposures. The oxidized DWCNTs gas sensors were also able to detect ammonia vapor at sub-ppm concentration in the presence of water vapor at high concentration
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Park, Hyoungki Lu Jianping. "Electronic and transport properties of functionalized carbon nanotubes." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2006. http://dc.lib.unc.edu/u?/etd,356.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2006.
Title from electronic title page (viewed Oct. 10, 2007). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Physics & Astronomy." Discipline: Physics and Astronomy; Department/School: Physics and Astronomy.
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Lim, Chee-Sern. "Fabrication of multifunctional nanocomposites using functionalized carbon nanofibers." Diss., Wichita State University, 2013. http://hdl.handle.net/10057/7026.

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In this work, several novel techniques to fabricate nano-engineered polymeric composites (or nanocomposites) containing functionalized carbon nanofibers (CNFs) were developed. The methodologies address current manufacturing issues of nano-engineered polymeric composites by effectively incorporating functionalized CNFs into polymer matrix and glass fiber layers. For polymeric nanocomposites, optical images of the nanocomposites revealed uniform distribution and alignment of the CNFs in the direction of the electric field. Due to the similarity in the alignment morphology, it was observed that alignment structure of the functionalized CNFs was independent of the functional groups grafted to the CNFs. Test results indicated that mechanical and electrical properties (measured parallel to the direction of the aligned CNFs) of nanocomposites containing aligned CNF network were improved in comparison to nanocomposites containing randomly distributed CNFs and neat epoxy sample. Discussion regarding the contribution of CNF type towards the mechanical and electrical properties is presented. In the first hierarchical composites study, functionalized CNFs were uniformly incorporated into glass fiber layers without inducing significant CNF agglomerate through a simple filtration process. Both in-plane and out-of-plane electrical conductivity of hierarchical composites were comparable to the conductivity of carbon fiber composites due to the formation of conductive path by CNFs. The second study presented the synthesis of functionalized CNF/glass fiber assembly demonstrating that functionalized CNF entangled network can be used to join glass fiber layers in the absence of polymer matrix. Test results showed that the peeling force required to separate the functionalized CNF/glass fiber assembly was significant due to the functionalized CNF entangled network. Possible explanations for both studies are provided in order to investigate the contribution of functionalized CNFs in each form of material.
Thesis (Ph.D.)--Wichita State University, College of Engineering, Dept. of Mechanical Engineering
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Kaufmann, Anika, David Kunhardt, Giuseppe Cirillo, Silke Hampel, and Bernd Schwenzer. "Functionalized carbon nanotubes as transporters for antisense oligodeoxynucleotides." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-156811.

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The use of DNA-based therapeutics requires efficient delivery systems to transport the DNA to their place of action within the cell. To accomplish this, we investigated multiwalled carbon nanotubes (pristine MWCNT, p-MWCNT) functionalized with hydroxyl groups via 1,3-dipolar cycloaddition. In this way, we have obtained MWCNT-f-OH with improved stability in aqueous dispersions which is an advantageous property for their use in cellular environments. Afterwards, a carrier strand oligodeoxynucleotide (CS-ODN) was adsorbed to MWCNT-f-OH followed by hybridization with a therapeutic antisense oligodeoxynucleotide (AS-ODN). The amount of adsorbed CS-ODN, as well as the complementary AS-ODN and a non-complementary oligodeoxynucleotide (NS-ODN) as reference, was directly measured by radionuclide labeling of ODNs. We show that subsequent release of AS-ODNs and NS-ODNs was possible for MWCNT-f-OH above the melting temperature of AS-ODNs at 80 °C and under physiological conditions at different pH values at 37 °C. We also show a very low influence of p-MWCNT and MWCNT-f-OH on the cell viability of the bladder carcinoma (BCa) cell line EJ28 and that both MWCNT types were internalized by EJ28. Therefore, MWCNT-f-OH represents a promising carrier able to transport and release AS-ODNs inside cells.
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Ryu, Janet (Janet Sun). "Work functions of functionalized singled-walled carbon nanotubes." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35056.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006.
Includes bibliographical references (leaves 39-40).
Introduction: Carbon nanotube (CNT) structures were discovered by Sumio Iijima in 1991 at NEC laboratories in Japan. Since their discovery, scientists and engineers have been fascinated by their electrical and mechanical properties. Their unique characteristics, in addition to their nanoscale size, have generated much excitement about the possible applications of this novel. material.
by Janet Ryu.
S.B.
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Books on the topic "Functionalized carbon"

1

Villa, Alberto, and Nikolaos Dimitratos, eds. Metal-free Functionalized Carbons in Catalysis. Cambridge: Royal Society of Chemistry, 2018. http://dx.doi.org/10.1039/9781788013116.

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Hussain, Chaudhery Mustansar, Jeenat Aslam, and Ruby Aslam. Functionalized Carbon Nanotubes for Biomedical Applications. Wiley & Sons, Incorporated, John, 2023.

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Hussain, Chaudhery Mustansar, and Shadpour Mallakpour. Functionalized Carbon Nanomaterials for Theranostic Applications. Elsevier, 2022.

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Hussain, Chaudhery Mustansar, Jeenat Aslam, and Ruby Aslam. Functionalized Carbon Nanotubes for Biomedical Applications. Wiley & Sons, Incorporated, John, 2023.

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Hussain, Chaudhery Mustansar, Jeenat Aslam, and Ruby Aslam. Functionalized Carbon Nanotubes for Biomedical Applications. Wiley & Sons, Incorporated, John, 2023.

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Hussain, Chaudhery Mustansar, Jeenat Aslam, and Ruby Aslam. Functionalized Carbon Nanotubes for Biomedical Applications. Wiley & Sons, Incorporated, John, 2023.

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Pure and Functionalized Carbon Based Nanomaterials. Taylor & Francis Group, 2020.

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Functionalized Carbon Nanomaterials for Theranostic Applications. Elsevier, 2022.

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Liu, Xi, Alberto Villa, Nikolaos Dimitratos, Kamalakannan Kailasam, and Spiros Zafeiratos. Metal-Free Functionalized Carbons in Catalysis: Synthesis, Characterization and Applications. Royal Society of Chemistry, The, 2018.

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Villa, Alberto, and Nikolaos Dimitratos. Metal-Free Functionalized Carbons in Catalysis: Synthesis, Characterization and Applications. Royal Society of Chemistry, The, 2018.

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Book chapters on the topic "Functionalized carbon"

1

Kannan, Ramaiyan, and Vijayamohanan K. Pillai. "Amine-Functionalized Carbon Nanotubes." In Surface Modification of Nanotube Fillers, 135–58. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2011. http://dx.doi.org/10.1002/9783527635085.ch7.

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Ahmed, Marya, and Ravin Narain. "Glycopolymer-Functionalized Carbon Nanotubes." In Engineered Carbohydrate-Based Materials for Biomedical Applications, 189–211. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470944349.ch5.

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Henna, T. K., K. P. Nivitha, V. R. Raphey, Chinnu Sabu, and K. Pramod. "Functionalized Graphene for Drug Delivery Applications." In Carbon Nanostructures, 247–78. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9057-0_11.

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Fu, Li. "Cyclodextrin Functionalized Graphene and Its Applications." In Carbon Nanostructures, 193–213. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9057-0_8.

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Campidelli, Stéphane, Stanislaus S. Wong, and Maurizio Prato. "Functionalized Carbon Nanotubes: (X-CNTs)." In Carbon Meta-Nanotubes, 113–61. Chichester, UK: John Wiley & Sons, Ltd, 2011. http://dx.doi.org/10.1002/9781119954743.ch3.

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Voelkel, Adam, and Beata Strzemiecka. "Chromatographic Techniques for Characterization of Carbons and Carbon Composites." In Pure and Functionalized Carbon Based Nanomaterials, 256–72. Boca Raton : CRC Press, Taylor and Francis Group, [2020] | “CRC Press is an imprint of the Taylor & Francis Group, an informa business.”: CRC Press, 2020. http://dx.doi.org/10.1201/9781351032308-11.

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Gu, Lingrong, Fushen Lu, Pengju G. Luo, Haifang Wang, Mohammed J. Meziani, and Ya-Ping Sun. "Functionalized Carbon Nanotubes for Bioapplications." In The Supramolecular Chemistry of Organic-Inorganic Hybrid Materials, 197–233. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470552704.ch6.

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Sinha, Ankita, Dhanjai, Jiping Chen, and Rajeev Jain. "Functionalized Graphene-Metal Nanoparticles Nanohybrids as Electrochemical Sensors." In Carbon Nanostructures, 49–62. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9057-0_2.

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Komatsu, Naoki, and Li Zhao. "Polyglycerol-Functionalized Nanoparticles for Biomedical Imaging." In Carbon Nanoparticles and Nanostructures, 139–59. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-28782-9_5.

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Abdali, Hanan, and Abdellah Ajji. "Functionalized Graphene/Polymer Nanofiber Composites and Their Functional Applications." In Carbon Nanostructures, 127–56. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9057-0_5.

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Conference papers on the topic "Functionalized carbon"

1

Georgakilas, Vasilios. "Organic Functionalized Carbon Nanotubes." In STRUCTURAL AND ELECTRONIC PROPERTIES OF MOLECULAR NANOSTRUCTURES: XVI International Winterschool on Electronic Properties of Novel Materials. AIP, 2002. http://dx.doi.org/10.1063/1.1514077.

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Khan, Waseem, Shahir Hussain, Azher Majid Siddiqui, and S. S. Islam. "Study of chemically functionalized carbon nanotubes." In PROCEEDING OF INTERNATIONAL CONFERENCE ON RECENT TRENDS IN APPLIED PHYSICS AND MATERIAL SCIENCE: RAM 2013. AIP, 2013. http://dx.doi.org/10.1063/1.4810169.

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Varadan, Vijay K., and Jining Xie. "Three-dimensional MEMS with functionalized carbon nanotubes." In SPIE's 9th Annual International Symposium on Smart Structures and Materials, edited by Vijay K. Varadan. SPIE, 2002. http://dx.doi.org/10.1117/12.475024.

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Camps, Ihosvany, and Mariana da Silva Ribeiro. "Electronic properties of disordered functionalized carbon nanotubes." In MOL2NET 2016, International Conference on Multidisciplinary Sciences, 2nd edition. Basel, Switzerland: MDPI, 2017. http://dx.doi.org/10.3390/mol2net-02-03860.

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Thakre, Piyush R., and Dimitris C. Lagoudas. "Multifunctional Multi-Scale Carbon-Fiber/Epoxy Matrix Composites Reinforced With Carbon Nanotubes." In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1483.

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In the present work, apart from developing a processing method for multi-scale laminates, characterization efforts are focused on finding longitudinal, transverse and in-plane shear modulus using flexure and in-plane shear testing of unidirectional, [0°]10, and multidirectional, [±45°]2s, laminates. A comparison of the above mentioned macroscale properties is presented for three types of composites, i.e., composites embedded with functionalized nanotubes, un-functionalized or pristine nanotubes and base composite without nanotubes. Classical laminate theory is used to model a representative laminate system. Transverse and longitudinal properties are presented and compared with experimental observations. Transmission and scanning electron microscopy is performed to study the nanotube dispersion and the morphology of fracture surfaces at different length scales.
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Chakraborty, Pinak, Tanmoy Majumder, Saurab Dhar, and Suvra Prakash Mondal. "Nonenzymetic glucose sensing using carbon functionalized carbon doped ZnO nanorod arrays." In DAE SOLID STATE PHYSICS SYMPOSIUM 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5028705.

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Atashbar, M. Z., C. Baratto, G. Faglia, and G. Sberveglieri. "Functionalized Single Wall Carbon Nanotubes Based Gas Sensor." In 2006 5th IEEE Conference on Sensors. IEEE, 2006. http://dx.doi.org/10.1109/icsens.2007.355758.

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Hu, Lung-Hao, Rishi Raj, Aylin Karakuscu, Andrea Ponzoni, Giorgio Sberveglieri, and Riccardo Ceccato. "PDCs functionalized carbon nanostructure for gas sensing application." In 2012 IEEE Sensors. IEEE, 2012. http://dx.doi.org/10.1109/icsens.2012.6411317.

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ALEXANDRESCU, LAURENTIA. "POLYMER NANOCOMPOSITES OF POLYAMIDE/POLYETHYLENE/ FUNCTIONALIZED CARBON FIBRES." In 18th International Multidisciplinary Scientific GeoConference SGEM2018. Stef92 Technology, 2018. http://dx.doi.org/10.5593/sgem2018/6.1/s24.054.

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Kapadia, Vishal, Houjin Huang, Erik Pierstorff, Mark Chen, and Dean Ho. "Magneto-therapeutic functionalized carbon nanoparticles for interrogative medicine." In 2008 3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems. IEEE, 2008. http://dx.doi.org/10.1109/nems.2008.4484514.

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Reports on the topic "Functionalized carbon"

1

Whitaker, Craig, Jay R. Heckert, and Ian C. Uber. Synthesis of Amide Functionalized Carbon Nanotubes. Fort Belvoir, VA: Defense Technical Information Center, January 2007. http://dx.doi.org/10.21236/ada519137.

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Wilkerson, Justin, Daniel Ayewah, and Daniel Davis. Fatigue Characterization of Functionalized Carbon Nanotube Reinforced Carbon Fiber Composites. Fort Belvoir, VA: Defense Technical Information Center, January 2007. http://dx.doi.org/10.21236/ada515475.

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Pfeifer, Peter, Andrew Gillespie, David Stalla, and Elmar Dohnke. Multiply Surface-Functionalized Nanoporous Carbon for Vehicular Hydrogen Storage. Office of Scientific and Technical Information (OSTI), February 2017. http://dx.doi.org/10.2172/1344383.

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Vance, Andrew L., Chu-Yeu Peter Yang, and Karen Lee Krafcik. LDRD final report : chromophore-functionalized aligned carbon nanotube arrays. Office of Scientific and Technical Information (OSTI), September 2011. http://dx.doi.org/10.2172/1030334.

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Vance, Andrew L., Thomas Zifer, Xinjian Zhou, Francois Leonard Leonard, Bryan Matthew Wong, Alexander Kane, Aaron Michael Katzenmeyer, and Karen Lee Krafcik. LDRD final report : energy conversion using chromophore-functionalized carbon nanotubes. Office of Scientific and Technical Information (OSTI), September 2010. http://dx.doi.org/10.2172/990068.

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Kommalapati, Raghava Rao, Hongbo Du, Xinhua Shen, and Ziaul Huque. Post Combustion Carbon Capture using Polyethylenimine (PEI) functionalized Titanate Nanotubes. Office of Scientific and Technical Information (OSTI), June 2019. http://dx.doi.org/10.2172/1530560.

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Johnson, Alan T., and Matthew Robinson. Antibody-Functionalized Carbon Nanotube Transistors as Biosensors for the Detection of Prostate Cancer. Fort Belvoir, VA: Defense Technical Information Center, July 2012. http://dx.doi.org/10.21236/ada573827.

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Johnson, Jr, Robinson Alan, and Matthew. Antibody-Functionalized Carbon Nanotube Transistors as Biosensors for the Detection of Prostate Cancer. Fort Belvoir, VA: Defense Technical Information Center, September 2013. http://dx.doi.org/10.21236/ada598486.

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Johnson, A. T., and Matthew Robinson. Antibody-Functionalized Carbon Nanotube Transistors as Biosensors for the Detection of Prostate Cancer. Fort Belvoir, VA: Defense Technical Information Center, September 2010. http://dx.doi.org/10.21236/ada546345.

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Johnson, Jr, and Alan. Antibody-Functionalized Carbon Nanotube Transistors as Biosensors for the Detection of Prostate Cancer. Fort Belvoir, VA: Defense Technical Information Center, July 2011. http://dx.doi.org/10.21236/ada549636.

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