Дисертації з теми "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.
Повний текст джерелаRauf, 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.
Повний текст джерелаPenmatsa, Varun. "Functionalized Carbon Micro/Nanostructures for Biomolecular Detection." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/739.
Повний текст джерелаRauf, Hendrik. "Metallic Ground State of Functionalized Carbon Nanotubes." Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A24959.
Повний текст джерелаPokhrel, Sewa. "FISCHER- TROPSCH SYNTHESIS ON FUNCTIONALIZED CARBON NANOTUBES." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1408.
Повний текст джерелаYang, Lin. "Functionalized double-walled carbon nanotubes for integrated gas sensors." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30254/document.
Повний текст джерелаWe 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
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.
Повний текст джерелаTitle 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.
Lim, Chee-Sern. "Fabrication of multifunctional nanocomposites using functionalized carbon nanofibers." Diss., Wichita State University, 2013. http://hdl.handle.net/10057/7026.
Повний текст джерелаThesis (Ph.D.)--Wichita State University, College of Engineering, Dept. of Mechanical Engineering
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.
Повний текст джерелаRyu, Janet (Janet Sun). "Work functions of functionalized singled-walled carbon nanotubes." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35056.
Повний текст джерелаIncludes 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.
Pham, Van Dong. "STM characterization of functionalized carbon nanotubes and graphene." Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCC245.
Повний текст джерелаIn this thesis we studied the interaction between organic molecules and carbon nanomaterials. Using scanning tunneling microscopy (STM) at low temperature and in ultra-high vacuum, we measured the properties of porphyrin molecules at the surface of graphene and single-walled carbon nanotubes. We first studied electron injection in graphene at defect sites (grain boundaries and nitrogen doping atoms). Using image-potential states, we evidenced the variation of local work function in doped graphene. Secondly, we investigated the properties of free-base porphyrin (H2TPP) molecules adsorbed on a Au(111) surface. We performed tip-induced tautomerization and dehydrogenation of the molecules, and revealed how these operations modify the molecular states and molecule-substrate interaction. Following these two preliminary studies, we studied the interaction of graphene with porphyrin molecules. We evidenced a weak electronic coupling between the molecules and graphene. We then showed how a nitrogen dopant on doped graphene can tune the molecule-surface interaction. The comparison between molecules adsorbed on nitrogen doping sites with those adsorbed on carbon sites clearly reveals a downshift of the energy of the molecular states at the doping sites. This downshift reveals a partial electron transfer from the nitrogen sites of graphene to the adsorbed molecules. In the last part of this thesis, we studied the properties of single-walled carbon nanotubes functionalized with a porphyrin polymer. The STM measurements revealed that the polymer is partially covering the nanotubes. Local spectroscopy indicated that the local density of states are modified at the polymer location
Barman, Poulami. "The interaction of peptides with functionalized carbon nanotubes /." Online version of thesis, 2009. http://hdl.handle.net/1850/8688.
Повний текст джерелаKrause, Caitlin Joy. "Evaluating the toxicity of nitrogen-functionalized carbon nanotubes." Thesis, University of Iowa, 2014. https://ir.uiowa.edu/etd/4667.
Повний текст джерелаPacheco, Rodriguez Diana Marisol. "Aminosilane-functionalized cellulosic polymers for increased carbon dioxide sorption." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42722.
Повний текст джерелаSreeramoju, Mahendra K. "PREPARATION, CHARACTERIZATION AND APPLICATIONS OF FUNCTIONALIZED CARBON NANO-ONIONS." UKnowledge, 2013. http://uknowledge.uky.edu/chemistry_etds/20.
Повний текст джерелаVenturelli, Enrica. "Antibody-functionalized carbon nanotubes towards a targeted anticancer therapy." Strasbourg, 2011. https://publication-theses.unistra.fr/public/theses_doctorat/2011/VENTURELLI_Enrica_2011_ED222.pdf.
Повний текст джерелаRecently, carbon nanotubes (CNTs) have emerged as new and promising materials for applications in different research fields such as nanotechnology and materials science. Recent studies on the ability of CNTs to form supramolecular complexes with nucleic acids or proteins triggered their applications in the biomedical domain, for example as drug delivery system. In this thesis, I focused my interest on the design and synthesis of antibody-CNT conjugates for targeted cancer therapy. The nanotubes are used as delivery system whereas the antibody is the targeting moiety for cancer cells. Nowadays antibodies represent a promising anticancer therapy, however they have not been utilized against intracellular targets because of their low aptitude to traverse the plasma membrane. On the contrary, CNTs have shown the ability to easily cross cell membrane via two mechanisms (endocytosis or passive diffusion). Results confirmed the possibility to covalently functionalize carbon nanotubes either with a targeting antibody or a therapeutic immunoglobulin. Once bound onto the surface of CNTs (sidewall or tips), surface plasmon resonance results displayed the conservation of the ability of the antibody to recognize the antigen. Important aspects related to the biomedical applications of these constructs are the evaluation of their potential toxicity and biodistribution profiles. Results indicated that the conjugates are biocompatible and they distribute mainly in liver, spleen and lungs. This work shows great promise for the use of functionalized carbon nanotubes as novel delivery system for drugs or bioactive molecules
Ojo, Kolade Omoniyi. "Mesoporous Functionalized Materials for Post-Combustion Carbon Dioxide Capture." Digital Commons @ East Tennessee State University, 2011. https://dc.etsu.edu/etd/1378.
Повний текст джерелаLiu, Jiayi. "Functionalized Octatetrayne as Novel Carbon Media for Capillary Liquid Chromatography." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1428922624.
Повний текст джерелаZiem, Benjamin [Verfasser]. "Polyvalent Virus Inhibitors Based on Functionalized Carbon Nanoarchitectures / Benjamin Ziem." Berlin : Freie Universität Berlin, 2017. http://d-nb.info/1130656705/34.
Повний текст джерелаZhou, Zheng. "The Investigation of Functionalized Carbon Nanotubes for the Carbon Dioxide Capture and Ethane Oxidative Dehyrogenation Catalysts." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8417.
Повний текст джерелаChan, Wai-Fong. "Functionalized carbon nanotube thin-film nanocomposite membranes for water desalination applications." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/64372.
Повний текст джерелаPh. D.
Wiredu, Bernard. "A novel classical synthetic approach to carbon nanotubes and their functionalized derivatives." Diss., Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/1706.
Повний текст джерелаTran, Huy Nam. "Raman scattering and optical spectroscopies of individual pristine and functionalized carbon nanotubes." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS150/document.
Повний текст джерелаThis work concerns the study of mono- and double-walled carbon nanotubes. It contains two distinct parts: (i) the first part is devoted to the understanding of the intrinsic optical and phonon properties of individual carbon nanotubes; (ii) the second part reports an experimental investigation of the properties of covalently and non-covalently functionalized double-walled carbon nanotubes. Concerning the study of the intrinsic properties of the individual carbon nanotubes, new information was obtained by coupling Raman spectroscopy data, including the measurement of the excitation profiles of different Raman-active modes, with optical absorption and electronic diffraction data. From a general point of view, our approach put in evidence the complementarity of the Raman spectroscopy and electronic diffraction for “the most probable” assignment of the structure of the nanotubes.Among the results obtained on individual single-walled carbon nanotubes (SWNTs), one can underline the confirmation of the excitonic character of the optical transitions by combining optical absorption and Raman excitation profiles on the same nanotubes, and the evidence of an unexpected behavior of the relative intensities of the LO and TO components of the G-modes. The study of the index-identified individual double-walled carbon nanotubes has permitted to understand the role of the inter-walls distance in the frequency shifts of the radial breathing-like modes (RBLM) and G-modes, by associating a given inter-walls distance to a negative (positive) internal pressure when this distance is larger (smaller) than 0.34 nm. On the other hand, the role of quantum interferences in the evolution with the excitation energy of the intensities of the LO and TO components of the G-modes was clearly identified. Finally, the assignment of the optical transitions, measured by absorption spectroscopy, of index-identified DWNTs was proposed.The study of the properties of functionalized DWNTs was performed by combining Raman spectroscopy, UV-visible-NIR absorption and photoluminescence (PL), including maps of photoluminescence excitation (PLE), on suspensions of DWNTs before and after functionalization: (i) covalently by using diazonium, (ii) covalently and non-covalently (pi-stacking) by using dye molecules. This work is a contribution to the debate on an essential question for the use of the DWNTs in opto-electronic devices, namely: “Do the DWNTs they luminesce? And if yes, what is the origin of the luminescence?". The presence of photoluminescence in our samples of DWNTs was established, and the study of its evolution with various kinds and degrees of functionalization states that PL can only result from inner tubes (intrinsic PL of DWNTs), or from SWNTs generated by the extrusion of the internal tubes of DWNTs during the preparation of the suspensions. On the other hand, one must emphasize the evidence of an energy transfer from the dye molecules towards the internal tube when such molecules are covalently grafted on the outer tube
Nebipasagil, Ali. "Chemically and Photochemically Crosslinked Networks and Acid-Functionalized Mwcnt Composites." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/42703.
Повний текст джерелаMaster of Science
Nitschke, Annika. "Investigation of Polymer-Filler Interactions Using Functionalized Nanoparticles." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://hdl.handle.net/21.11130/00-1735-0000-0005-1363-6.
Повний текст джерелаKurkina, Tetiana [Verfasser]. "Label-free electrical biosensing based on electrochemically functionalized carbon nanostructures / Tetiana Kurkina." Gießen : Universitätsbibliothek, 2012. http://d-nb.info/1064173438/34.
Повний текст джерелаLiu, Jiayi. "Development and Applications of Functionalized Octatetrayne as Novel Carbon Media in Chromatography." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1519322396476316.
Повний текст джерелаHeister, Elena. "Functionalized carbon nanotubes as a multimodal drug delivery system for target cancer therapy." Thesis, University of Surrey, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.529424.
Повний текст джерелаSurapathi, Anil Kumar. "Functionalized Single Walled Carbon Nanotube/Polymer Nanocomposite Membranes for Gas Separation and Desalination." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/40297.
Повний текст джерелаPh. D.
Olevik, David. "Laser induced effects in carbon nanotubes : implications for Raman characterization of functionalized systems." Licentiate thesis, Luleå : Luleå University of Technology, 2009. http://pure.ltu.se/ws/fbspretrieve/2724954.
Повний текст джерелаGupta, Ashim. "Evaluation of Non-functionalized Single Walled Carbon Nanotubes Composites for Bone Tissue Engineering." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/dissertations/819.
Повний текст джерелаClément, Pierrick. "Functionalized carbon nanotubes for detecting traces of benzene vapours employing screen-printed resistive and resonant transducers." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/364789.
Повний текст джерелаCapas sensibles basadas en nanotubos de carbono multi pared (MWCNTs) han sido depositadas sobre diferentes sustratos de transductores para su aplicación en sensores de gases. MWCNTs tratados con plasma de oxígeno, llamados O-MWCNTs, han sido el compuesto básico para el desarrollo de otros nanomateriales sensibles a gases. Primero, O-MWCNTs fueron estudiados como sensores de gas resistivos. Compuestos orgánicos volátiles (COVs) como benceno, tolueno, etanol, y acetona fueron usados para caracterizar esta capa sensible. Los sensores muestran una buena sensibilidad y una recuperación excelente de la línea de base en presencia de vapores de benceno o tolueno en comparación a otros COVs probados. O-MWCNTs fueron estudiados como nanomateriales adsorbentes depositados sobre micropalancas resonantes piezoeléctricas de PZT fabricadas por serigrafía multi-capa. En segundo término, una modificación del electrodo superior en forma de dos electrodos interdigitados fue implementada con el objetivo de obtener un elemento transductor capaz de implementar dos mecanismo de transducción. Esta configuración nos ha permitido medir, con un solo dispositivo, el cambio en la resistencia de la capa de los nanotubos de carbono y el desplazamiento de la frecuencia de resonancia de la micropalanca PZT bajo exposicion a los COVs. Las propiedades de detección de estos sistemas han sido estudiadas para los contaminantes benceno, CO y NO2. Desplazamientos positivos y negativos de la frecuencia de resonancia son observados a bajas y altas concentraciones, respectivamente. Esto es atribuido a los efectos de estrés y de masa convirtiéndose en dominantes a bajos o altos niveles de concentración. Monitorizando la resistencia de la capa de los O-MWCNTs de tipo-p ayuda a discriminar los gases/vapores en acuerdo con sus caracteres oxidante o reductor. El interés de la doble transducción ha sido demostrado con la detección de CO. Finalmente, frente a la dificultad de detectar benceno a baja concentración, un enfoque diferente basado en el reconocimiento molecular "host-guest" es propuesto. Para promover interacciones especificas hacia el benceno, los MWCNTS funcionalizados con un cavitando de tipo quinoxalina fueron empleados. Una detección de 2.5 ppb de benceno en aire seco es demostrado con un límite de detección (LOD) cerca de 600 ppt.
Multiwall carbon nanotubes (MWCNTs) base sensitive layers have been deposited onto different transducer substrates for gas sensing application. Oxygen plasma treated MWCNTs, so-called O-MWCNTs, have been a building block for developing other gas sensitive nanomaterials. At first, O-MWCNTs were studied as resistive gas sensors. Volatile organic compounds (VOCs) such as benzene, toluene, ethanol, methanol and acetone were used to characterize this sensitive layer. The sensors showed good sensitivity and excellent baseline recovery in the presence of benzene or toluene vapors compared to the others tested VOCs. O-MWCNTs were studied as adsorbent nanomaterials deposited on PZT piezoelectric resonant cantilevers fabricated by multilayer screen-printing. In the second step, a modification of the top electrode to become an interdigitated electrode was implemented in order to have a sensor transducer employing two transduction mechanisms. This configuration allowed us to measure, for a single device, the resistance change of the carbon nanotube film and the resonance frequency shift of the PZT cantilever upon exposure to VOCs. The sensing properties of such systems have been studied for benzene, CO, and NO2 contaminants. Positive and negative shifts of the resonance frequency are observed at low and high gas concentrations, respectively. These are attributed to stress or to mass effects becoming dominant at low or high gas concentration levels. Monitoring the resistance of the p-type O-MWCNT film helps discriminating gases/ vapours according to their oxidizing or reducing character. The interest of the double transduction has been demonstrated in the detection of CO. Finally, in front of the difficulty to detect benzene at low concentrations, a different approach based on the host-guest molecular recognition is proposed. To promote specific interaction toward benzene, quinoxaline-walled thioether-legged deep cavitand functionalized MWCNTs are used. The detection of 2.5 ppb of benzene in dry air is demonstrated with a limit of detection (LOD) near 600 ppt.
Solares, Rivera Santiago de Jesus Goddard William A. "Multi-scale simulations of single-walled carbon nanotube atomic force microscopy and density functional theory characterization of functionalized and non-functionalized silicon surfaces /." Diss., Pasadena, Calif. : Caltech, 2006. http://resolver.caltech.edu/CaltechETD:etd-05122006-102528.
Повний текст джерелаKong, Na. "Carbohydrate-Functionalized Nanomaterials : Synthesis, Characterization and Biorecognition Studies." Doctoral thesis, KTH, Organisk kemi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172990.
Повний текст джерелаQC 20150907
Bernhardt, Sebastian. "Magnesium halide-mediated addition of functionalized organozinc reagents to aldehydes, ketones and carbon dioxide." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-147538.
Повний текст джерелаBurns, Daniel James. "On single-molecule DNA sequencing with atomic force microscopy using functionalized carbon nanotube probes." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/32520.
Повний текст джерелаIncludes bibliographical references (p. 91-103).
A novel DNA sequencing method is proposed based on the specific binding nature of nucleotides and measured by an atomic force microscope (AFM). A single molecule of DNA is denatured and immobilized on an atomically fiat surface, and a force probe functionalized with a nucleotide is scanned along the molecule to detect locations of the probe nucleotide's complement. To increase the spatial resolution of the atomic force microscope so that individual bases can be distinguished, a single-walled carbon nanotube is grown from the AFM probe and functionalized with a single nucleotide. The carbon nanotube diameter is of the order as the nucleotide base spacing--providing the necessary spatial resolution for single molecule sequencing. The absolute force detection limit of the microscope is thermal noise-limited and derived herein from the equipartition theorem. The calculated minimum detectable force is less than experimentally obtained nucleotide binding forces, indicating that the AFM is capable of directly measuring single nucleotide interactions. A model of the oscillating AFM probe dynamics is developed, allowing a methodical approach to determining attractive forces with a chemically-specific sensor. This attractive force detection is performed by measuring the phase lag of the oscillating probe near the sample surface as compared to the resonating probe in free air. As grown, the carbon nanotubes are too long to be used as reliable force probes, therefore a method for shortening carbon nanotubes is presented utilizing high voltages to remove material. Measuring the length of the nanotube is performed with a novel technique that exploits the nanotube's unique elastic buckling property.
(cont.) This measurement technique characterizes the length of the nanotube while the probe is still mounted on the AFM and alleviates the need for a secondary microscope. The shortening procedure developed is performed in conjunction with the nucleotide functionalization, creating a precise and chemically-specific force probe. Experiments are performed on synthetic DNA of a known sequence to validate the proposed approach. A functionalized carbon nanotube force probe is scanned along single molecules of synthetic DNA to determine locations of target bases.
by Daniel J. Burns.
S.M.
White, Madeleine Michael Isabella. "Optimization and Longevity of Functionalized Multi-Walled Carbon Nanotube-Enabled Membranes for Water Treatment." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2174.
Повний текст джерелаClément, Pierrick. "Functionalized carbon nanotubes for detecting traces of benzene vapors employing screen-printed resistive and resonant transducers." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0127/document.
Повний текст джерелаMultiwall carbon nanotubes (MWCNTs) base sensitive layers have been deposited onto different transducer substrates for gas sensing application. Oxygen plasma treated MWCNTs, so-called O-MWCNTs, have been a building blockfor developing other gas sensitive nanomaterials. At first, OMWCNTs have been studied as resistive gas sensors. Volatile organic compounds (VOCs) such as benzene, toluene, ethanol, methanol and acetone have been used to characterize this sensitive layer. The sensors show good sensitivity and excellent baseline recovery in the presence of benzene or toluene vapors compared to the others tested VOCs. OMWCNTs have been studied as adsorbent nanomaterials deposited on PZT piezoelectric resonant cantilevers fabricated by multilayer screen-printing. In the second step, a modification of the rectangular top electrode to become an interdigitated electrode was implemented in order to have a sensor transducer employing two transduction mechanisms. This configuration allowed us to measure, for a single device, the resistance change of the carbon nanotube film and the resonance frequency shift of the PZT cantilever up on exposure to VOCs. The sensing properties of such systems have been studied for benzene, CO, and NO2 contaminants. Positive and negative shifts of the resonance frequency are observed at lowand high gas concentrations, respectively. These are attributed to stress or to mass effects becoming dominant at low or high gas concentration levels. Monitoring the resistance of the p type O-MWCNT film helps discriminating gases/ vapours according to their oxidizing or reducing character. The interest of the double transduction has been demonstrated in the detection of CO. Finally, in front of the difficulty to detect benzene at low concentrations, a different approach based on the host-guest molecular recognition is proposed. To promote specific interaction toward benzene, quinoxaline-walled thioether-legged deep cavit and functionalized MWCNTs are used. The detection of 2.5 ppb of benzene in dry air is demonstrated with a limit of detection (LOD) near 600 ppt.These remarkable results show the potentiality of functionalized carbon nanotubes in aromatic vapor sensing at traces level
Jasim, Nuralhuda Aladdin. "THE PROPERTIES OF NATURAL ORGANIC MATTER (NOM) AFFECT THE IMPACT OF NON-FUNCTIONALIZED AND FUNCTIONALIZED MULTI-WALLED CARBON NANOTUBES (MWCNTS) ON TOMATO PLANTS (SOLANUM LYCOPERSICUM)." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1299.
Повний текст джерелаKenney, Floyd E. "Biosensor Production By Conjugation Of HSA-Specific Peptide To Functionalized Nanotube Fiber." Youngstown State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1525360589515967.
Повний текст джерелаVan, den Hoven Bernard G. "New innovations in rhodium catalyzed transformation of alpha-functionalized alkynes utilizing carbon monoxide and hydrogen." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6322.
Повний текст джерелаTwomey, John Ryan. "Characterization of nanocomposite scaffolds composed of collagen and functionalized carbon nanotubes for tissue engineering applications." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1447691.
Повний текст джерелаSu, Xin. "NOVEL DESIGN OF FUNCTIONALIZED CARBON NANOTUBE ELECTRODES AND MEMBRANES FOR FUEL CELLS AND ENERGY STORAGE." UKnowledge, 2012. http://uknowledge.uky.edu/cme_etds/5.
Повний текст джерелаZhou, Zhengping. "Synthesis and Characterization of Novel Hierarchically Functionalized Carbon Nanofibers for Energy Conversion and Storage Applications." Diss., North Dakota State University, 2014. https://hdl.handle.net/10365/27241.
Повний текст джерелаDOE EPSCoR IIP Program - Sustainable Energy Seed Grants Initiative (SUNRISE); National Science Foundation (NSF); North Dakota NASA EPSCoR; North Dakota Soybean Council; ND EPSCoR Doctoral Dissertation Fellowship
National Science Foundation (NSF)
DOE EPSCoR
ND NASA EPSCoR
North Dakota Soybean Council
ND EPSCoR Doctoral Dissertation Fellowship
Requardt, Hendrik [Verfasser]. "Polyethylene Glycol functionalized Multi Walled Carbon Nanotubes for Nanomedical application as Drug Carriers / Hendrik Requardt." Hannover : Bibliothek der Tierärztlichen Hochschule Hannover, 2017. http://d-nb.info/115034105X/34.
Повний текст джерелаYamamoto, Hiroki. "Syntheses, Structures, and Applications of Inorganic Materials Functionalized by Fluorine." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263756.
Повний текст джерелаRiaz, Ali 1981. "Functionalized polyhedral oligomeric silsesquioxane (POSS) for incorporation of chemically pendant chains = Utilização de silsesquioxanos oligoméricos poliédricos funcionalizados (POSS) no ancoramento de cadeias orgânicas à superfície." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250644.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Instituto de Química
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Resumo: Este trabalho apresenta a síntese e caracterização de compostos silsesquioxanos gaiola cúbica (POSS) com cadeias orgânicas pendentes. O projeto foi iniciado com a idéia de sintetizar os silsesquioxanos cúbicos com cadeias organofuncionalizadas ancoradas, capazes de capturar os metais pesados, corantes e CO2. Mas foram enfrentadas algumas dificuldades como baixo rendimento (30-37%) e longo tempo de reação (5-35 dias). As reações foram investigadas para melhorar o rendimento, bem como para reduzir o tempo de reação. Algumas modificações em rotas de reação foram introduzidas, o que trouxe melhorias notáveis nos resultados, onde o rendimento aumentou cerca de 64 % e o tempo de reação foi reduzido para 24 horas em média. Na sequência, os produtos sintetizados foram caracterizados para elucidar suas estruturas, utilizando diferentes técnicas físicas tais como FTIR, CHN, XRD, MEV, TGA, 13CNMR e 29SiNMR no estado sólido, onde as gaiolas Si-O de todos os compostos foram evidenciadas por meio de 29SiRMN e dos seus espectros de FTIR, enquanto as cadeias ancorados às gaiolas de POSS foram confirmadas utilizando os resultados de 13CRMN, juntamente com seus respectivos espectros de FTIR. Os compostos sintetizados também foram testados quanto à sua estabilidade térmica utilizando a técnica de TGA. Após a otimização da síntese de silsesquioxanos cúbicos, os híbridos PAA-13-3, PAA-MTC e PAA-Ph foram avaliados por suas habilidades de captação de cátions bivalentes, tais como Cu2+, Cd2+ e Pb2+ de suas soluções aquosas, sendo que o Cu2+ apresentou maior afinidade de sorção em relação aos dois metais. Estes sistemas de sorção foram analisados através ICP-OES. Para explicar o comportamento de sorção destas amostras alguns modelos estatísticos como Langmuir, Freundlich, Temkin e Redlich-Peterson foram aplicadas, onde os dados de sorção de Cu2+ em PAA-13-3 foram melhor ajustados pelo modelo Langmuir, mostrando ser uma sorção monocamada, enquanto que no caso do PAA-MTC e PAA-Ph modelo de melhor ajuste foi o Freundlich, confirmando a sorção de múlti camadas. Um dos materiais sintetizados (PAA-13-3) foi avaliado quanto à sua capacidade de adsorver CO2 gasoso, mostrando-se promissor na remoção de CO2, mesmo a baixas pressões (máx. 100 mm Hg). A adsorção de CO2 no material também foi estudada por calorimetria de adsorção gás-sólido, em um calorímetro especialmente desenvolvido para tal, observando-se valores de entalpia de adsorção entre -36 e -7 kJ mol-1
Abstract: This report presents the synthesis and characterization of POSS compounds having cubic silsesquioxane cage to which the organic pendant chains are anchored. The project was started with the idea to synthesize the cubic silsesquioxanes with organofunctionalized pendant chains, which are able to capture heavy metals, dyes and some acids like CO2. But in the beginning the hurdles like low % yields (30-37 %) and long reaction times (5-35 days) were to be faced. The reactions were worked out to enhance the % yields as well as to reduce the reaction time. Some modifications in reaction routes have been introduced, which brought up remarkable improvements in the results, where yield was increased upto 64 % and reaction time was reduced to 1 day. All the synthesized products were then characterized for their structure elucidations using different physical techniques like FTIR, CHN, TGA, 13CNMR & 29SiNMR in solid state, where Si¿O cages of all compounds were elaborated through 29Si-NMR in solid state as well as through their respective FTIR patterns, while the pendant chains anchored to the POSS cages were confirmed using 13C-NMR results along with their respective FTIR spectra. The synthesized compounds were then tested for their thermal stability using the TGA technique. After optimizing the synthesis of cubic silsesquioxanes, hybrids PAA-13-3, PAA-MTC and PAA-Ph were worked out for their abilities of capturing divalent cations like Cu2+, Cd2+ and Pb2+ from their aqueous solutions, where Cu2+ showed higher affinity of sorption than other two bivalent metals. These sorption systems were analyzed using the ICP-OES. To explain the sorption behaviour of these samples some statistical models like Langmuir, Freundlich, Sips, Temkin and Redlich-Peterson were applied to the sorption data, where the data for Cu2+ on to PAA-13-3 was best fitted by Langmuir adsorption isotherm model showing the sorption to be monolayer, while in case of PAA-MTC and PAA-Ph Freundlich model was found to be a best fit, confirming multilayer sorption. One of the synthesized materials (PAA-13-3) was also evaluated for its ability to adsorb gaseous CO2 and was proved to be promising in removing CO2, even at low pressures (max. 100 mmHg). The adsorption of CO2 in the material is also studied by solid-gas adsorption calorimetry through a calorimeter especially developed for this system, where enthalpy of adsorption values were found to be between -7 and -36 kJ mol-1
Doutorado
Quimica Inorganica
Doutor em Ciências
Adhikari, Kamal. "Effects of functionalized single walled carbon nanotubes on the processing and mechanical properties of laminated composites." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99617.
Повний текст джерелаLes nanotubes de carbone sont considérés comme ayant un potentielénorme pour assurer le rôle de renforts dans la prochaine génération de matériauxcomposites. Dans les décennies précédentes, les effets des nanotubes surl'amélioration des propriétés mécaniques, électriques et multi-fonctionnelles despolymères ont été révélés. Par contre, dans la plupart des cas, les études réaliséespar différents groupes de recherche et portant sur les mêmes composites faits depolymère renforcé de nanotubes ne présentent pas toutes des résultatscomparables. La cause majeure de cette variabilité est la méthodologie utiliséelors du procédé de fabrication de ces composites. Avant que quiconque ne suggèreune méthodologie idéale et systématique, il est impératif de comprendre les basesfondamentales de l'effet des nanotubes sur le procédé de fabrication. Dans cetterecherche, les effets des nanotubes de carbone à paroi simple sur les propriétésthermo mécaniques et thermo chimiques d'une résine époxy de gradeaéronautique ont été investigués. Les caractéristiques étudiées comprennent ladégradation thermique, le comportement rhéologique, la cinétique depolymérisation, ainsi que l'expansion thermique. L'effet de l'application d'unfilm de nanotube/époxy sur la résistance interlaminaire au cisaillement aégalement été étudié avec un préimprégné conventionel de fibre de carbone etd'époxy. Les résultats de caractérisation montrent que les nanotubes ont un effetsignificatif sur certaines propriétés physiques et chimiques inhérentes à l'époxy.La présence des nanotubes crée un délai dans la température de dégradation del'époxy. La viscosité de la résine est 7 fois plus élevée à la température de la pièceet sa température de gélification est inférieure. De plus, la chaleur totale deréaction est diminuée. Par contre, les tests mécaniques montrent que l'applicationd'un film de nanotube/époxy ne cause pas de changement dans la résistanceinterlaminaire au cisaillement d'un préimprégné de fibre de carbone et d'époxy.Par ailleurs, cette valeur de résistance est dépendante de l'alignement desnanotubes et de la méthode d'application du film sur les interfaces du laminé.Finalement, il a été observé que les nanotubes n'ont aucun effet sur les propriétésthermo mécaniques.
Ferreira, Rúben Rodrigues. "Flavylium-Functionalized Carbon Quantum Dots." Master's thesis, 2016. http://hdl.handle.net/10362/20621.
Повний текст джерела"Polyethyleneimine functionalized nano-carbons for the absorption of carbon dioxide." Thesis, 2012. http://hdl.handle.net/1911/70229.
Повний текст джерела