Rozprawy doktorskie na temat „Chemisorbed”
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Saidy, Madiba. "LEED crystallographic studies for chemisorbed surfaces". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0015/NQ46413.pdf.
Pełny tekst źródłaUnsworth, Larry David Brash J. L. "Protein adsorption to chemisorbed polyethylene oxide thin films". *McMaster only, 2005.
Znajdź pełny tekst źródłaSrepusharawoot, Pornjuk. "Computational Studies of Hydrogen Storage Materials : Physisorbed and Chemisorbed Systems". Doctoral thesis, Uppsala universitet, Materialteori, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-132875.
Pełny tekst źródłaFelaktigt tryckt som Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 712
Lei, Jipu. "Cu Electrodeposition on Ru with a Chemisorbed Iodine Surface Layer". Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc5577/.
Pełny tekst źródłaBrowne, V. M. "Experimental and theoretical infra-red studies of chemisorbed molecules and their interactions". Thesis, Bucks New University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384768.
Pełny tekst źródłaSanabria-Chinchilla, Jean. "Electrochemical hydrogenation of aromatic compounds chemisorbed at polycrystalline and single-crystal Pd surfaces". [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1750.
Pełny tekst źródłaAlcantara, Ortigoza Marisol. "Theoretical studies of electronic, vibrational, and magnetic properties of chemisorbed surfaces and nanoalloys". Diss., Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/496.
Pełny tekst źródłaWu, Yuk Kuen. "LEED crystallographic studies of sulfur chemisorbed on the (111) surfaces of nickel and rhodium". Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27751.
Pełny tekst źródłaScience, Faculty of
Chemistry, Department of
Graduate
Zolfaghari-Hesari, Alireza. "Thermodynamic states of adsorbed hydrogen at noble-metal electrocatalysts in absence/presence of chemisorbed sulfur". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ35782.pdf.
Pełny tekst źródłaHong, Sampyo. "First-principles study of chemisorbed light gases on transition metal and transition metal oxide surfaces : structure, dynamics and reaction /". Search for this dissertation online, 2005. http://wwwlib.umi.com/cr/ksu/main.
Pełny tekst źródłaQian, Shiyuan. "Kinetic interpretation of promoting/inhibiting effects of chemisorbed species on H sorption at/in Fe, mild-steel and Pd". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0035/NQ67589.pdf.
Pełny tekst źródłaQian, Shiyuan. "Kinetic interpretation of promoting/inhibiting effects of chemisorbed species on hydrogen sorption at/in iron, mild-steel and palladium". Thèse, Université de Sherbrooke, 1999. http://savoirs.usherbrooke.ca/handle/11143/4995.
Pełny tekst źródłaQian, Shiyuan. "Kinetic interpretation of promoting/inhibiting effects of chemisorbed species on hydrogen sorption at/in iron, mild-steel and palladium". Sherbrooke : Université de Sherbrooke, 2000.
Znajdź pełny tekst źródłaBruzzi, Mara, Riccardo Mori, Andrea Baldi, Ennio Carnevale, Alessandro Cavallaro i Monica Scaringella. "Thermally Stimulated Currents in Nanocrystalline Titania". MDPI AG, 2018. http://hdl.handle.net/10150/627084.
Pełny tekst źródłaByloos, Martin. "Spectroelectrochemical study of the reductive desorption and the oxidative redeposition of a monolayer of 1-hexadecanethiols chemisorbed on gold(111)". Thesis, University of Ottawa (Canada), 2000. http://hdl.handle.net/10393/8865.
Pełny tekst źródłaByloos, Martin. "Spectroelectrochemical study of the reductive desorption and the oxidative redeposition of a monolayer of 1-hexadecanethiols chemisorbed on Au(111)". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0016/MQ48139.pdf.
Pełny tekst źródłaIqbal, Danish [Verfasser], Martin [Gutachter] Muhler i Andreas [Gutachter] Erbe. "Ultrathin chemisorbed polymer coatings : corrosion protection and nanostructuring of ZnO / Danish Iqbal ; Gutachter: Martin Muhler, Andreas Erbe ; Fakultät für Chemie und Biochemie". Bochum : Ruhr-Universität Bochum, 2015. http://d-nb.info/1223172155/34.
Pełny tekst źródłaZeng, Yang. "Using surface spectroscopy to help Interpret STM images of chemisorbed molecules : application to the study of the hydrogenation of ketones and a-ketoesters on Pt". Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/26793.
Pełny tekst źródłaSince high enantiopurity is required in the pharmaceutical industry, studies aimed at discovering the mechanisms for the enantioselective hydrogenation of ketones or keto-esters on surfaces and at successfully seeking out new or better performing asymmetric catalysts are of great significance. Scanning tunneling microscopy (STM), reflection absorption infrared spectroscopy (RAIRS), temperature-programmed desorption spectroscopy (TPD) and X-ray photoelectron spectroscopy (XPS) are powerful methods to facilitate an understanding of the reaction mechanisms. In addition to insight on reaction mechanisms, the studies can contribute information on reaction dynamics in heterogeneous catalysis and on the development of density functional theory (DFT) methods to compute weak interactions in surface processes. In turn, DFT calculations provide critical help in the interpretation of STM and surface spectroscopy data. In this thesis, some ketones and keto-esters on platinum surface are studied by the above mentioned sophisticated techniques. My studies demonstrate that the combination of using routine spectroscopy, nanotechnology, and state of the art calculations is an effective method to study reactions on surface as they explore different aspect of surface, and mutually help each other for some interpretations.
Cafe, Peter F. "Towards reliable contacts of molecular electronic devices to gold electrodes". Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/3870.
Pełny tekst źródłaCafe, Peter F. "Towards reliable contacts of molecular electronic devices to gold electrodes". University of Sydney, 2008. http://hdl.handle.net/2123/3870.
Pełny tekst źródłaSYNOPSIS OF THIS THESIS The aim of this thesis is to more fully understand and explain the binding mechanism of organic molecules to the Au(111) surface and to explore the conduction of such molecules. It consists of five discreet chapters connected to each other by the central theme of “The Single Molecule Device: Conductance and Binding”. There is a deliberate concentration on azine linkers, in particular those with a 1,10-phenanthroline-type bidentate configuration at each end. This linker unit is called a “molecular alligator clip” and is investigated as an alternative to the thiol linker unit more commonly used. Chapter 1 places the work in the broad context of Molecular Electronics and establishes the need for this research. In Chapter 2 the multiple break-junction technique (using a Scanning Tunnelling Microscope or similar device) was used to investigate the conductance of various molecules with azine linkers. A major finding of those experiments is that solvent interactions are a key factor in the conductance signal of particular molecules. Some solvents interfere with the molecule’s interaction with and attachment to the gold electrodes. One indicator of the degree of this interference is the extent of the enhancement or otherwise of the gold quantized conduction peak at 1.0 G0. Below 1.0 G0 a broad range for which the molecule enhances conduction indicates that solvent interactions contribute to a variety of structures which could bridge the electrodes, each with their own specific conductance value. The use of histograms with a Log10 scale for conductance proved useful for observing broad range features. vi Another factor which affects the conductance signal is the geometric alignment of the molecule (or the molecule-solvent structure) to the gold electrode, and the molecular alignment is explored in Chapters 3 for 1,10-phenanthroline (PHEN) and Chapter 4 for thiols. In Chapter 3 STM images, electrochemistry, and Density Functional Theory (DFT) are used to determine 1,10-phenanthroline (PHEN) structures on the Au(111) surface. It is established that PHEN binds in two modes, a physisorbed state and a chemisorbed state. The chemisorbed state is more stable and involves the extraction of gold from the bulk to form adatom-PHEN entities which are highly mobile on the gold surface. Surface pitting is viewed as evidential of the formation of the adatom-molecule entities. DFT calculations in this chapter were performed by Ante Bilic and Jeffery Reimers. The conclusions to Chapter 3 implicate the adatom as a binding mode of thiols to gold and this is explored in Chapter 4 by a timely review of nascent research in the field. The adatom motif is identified as the major binding structure for thiol terminated molecules to gold, using the explanation of surface pitting in Chapter 3 as major evidence and substantiated by emergent literature, both experimental and theoretical. Furthermore, the effect of this binding mode on conductance is explored and structures relevant to the break-junction experiment of Chapter 2 are identified and their conductance values compared. Finally, as a result of researching extensive reports of molecular conductance values, and having attempted the same, a simple method for predicting the conductance of single molecules is presented based upon the tunneling conductance formula.
Fang, Sheng-Shiun, i 方聖熏. "Theoretical Study of Oxygen Atoms Chemisorbed on SWCNTs". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/77121166425524961462.
Pełny tekst źródła國立成功大學
化學系碩博士班
93
In the present work, theoretical study utlizing DFT and AM1 method to calculate single point energies and structure optimizations of capped finite length single-walled carbon nanotubes (SWCNTs), respectively, including (5,5), (6,4), (7,3), (8,1), (9,0), (10, 0), (9, 2), (8, 4), (8, 3), (7, 5), (7, 4), (6, 5), and (6, 6), chemisorbed by an oxygen atom were carried out by means of GAUSSIAN suite of programs. It reveals that the C-C bond adsorbed by an oxygen atom elongates universally. Based on the extent of elongation of the C-C bond on the SWCNT adsorbed chemically by an oxygen atom, it can be devided as two areas: DA, drastic-alteration area (sin2θ > 0.5) and SA, slight-alteration area (sin2θ < 0.5). In DA area, adsorption energies are much higher than those in other angle range; in other words, that is, DA is more stable than SA. According to DOS data, the conductivity of SWCNTs in DA is almost equivalent to that before adsorption and that of SWCNTs in SA changes significantly. Consequently, due to the oxygen atom adsorption is more stable in DA than in SA, it is reasonable to conjecture that oxygenation is not the main cause to ameliorate the conductance of SWCNTs.
Chapman, Christopher Rodney Leon. "Multiple Scale Theoretical Insights on the Switching Behavior of Chemisorbed Azobenzene". Thesis, 2011. http://hdl.handle.net/1828/4953.
Pełny tekst źródłaGraduate
0485
Lee, Shang Yu, i 李尚諭. "Preparation of Nanogold Chemisorbed onto the Side Chain of Polystyrene via living Polymerization". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/25435378710039642785.
Pełny tekst źródła國立中正大學
化學工程研究所
99
The work is mainly to use anionic polymerization and living-free radical polymerization for our research. The way is to prepare polystyrene containing sulfide group onto the polymer side chain. And then, blok homo-polystyrene to become a diblock copolymer. On the other hand, we can control the proportion of anchor group. So, we can control the solubility of our polymer by control the proportion of polystyrene and poly(2-methylthio-1-para-styrene-ethylane). The synthesize steps are as followed. First, we prepare homo-poly(p-cms) by RITP, and then block polystyrene to become diblock copolymer. The second step, we use anionic polymerization replace Cl group of poly(p-cms) to become dimethysulfide. Finally, we can combine the polymerization technique and gold nanoparticle for synthesizing gold nanoparticle/polystyrene-b-poly(2-methylthio-1-para- styrene-ethylane) nanocomposite. Also, we observe the gold nanoparticle size via adding different amount of polymer to chemisorbed gold nanoparticles . The composite is analyzed useing GPC , NMR, XPS, TGA, DSC, UV/VIS, SEM and TEM.
Huang, Hsuan-Ming, i 黃宣銘. "Preparation of Polystyrene-chemisorbed Nanogold and Polystyrene-grafted Carbon Nanotubes (Nanocapsules) Nanocomposites via Anionic Polymerization". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/69321303752706809554.
Pełny tekst źródła國立中正大學
化學工程所
94
The first section of paper is mainly to combine the anionic polymerization technique and gold nanoparticle for synthesizing gold nanoparticle/poly p-methylstyrene nanocomposite. The way is to prepare poly p-methylstyrene containing sulfide group and use this sulfide group for chemisorption of gold nanoparticl. The steps are: first, polymerization of p-methylstyrene. Second, chlorination by sodium hypochlorite and phase transfer catalyst of the polymer to produce CH2Cl group. Third, lithiation of dimethyl sulfide by n-butyllithium and capping with the chlorinated polymer. The feature of the study is that functionalization of polymer occurs on side-chains rather than main-chain ends. Therefore more bonding points are available for reaction. Finally, the composite is analyzed using TEM, UV-VIS, TGA, EDS and XPS. The second section of paper describes the method for preparing polystyrene- functionalized multiple-walled carbon nanotubes (MWNTs) by terminating anionically synthesized living polystyryllithium with acyl chlorides on the MWNTs. The acyl chloride functionalities on the MWNTs were in turn obtained by first forming the carboxyls via chemical oxidation and then converting them to acyl chlorides. The polystyrene- functionalized MWNTs had good dispersion in common organic solvents and thus indicated a good compatibility for use in the preparation of styrenic nanocomposite materials. In the last section, the novel polymeric composite material, polystyrene- grafted CNCs, has been prepared. sec-Butyllithium was first used to introduce negative charges on CNCs and the these CNC carbanions acted then as initiators for anionic polymerization of styrene. The polystyrene-grafted CNCs had good dispersion in common organic solvents and thus indicated a good compatibility when further blended with other styrenic polymers. Synthesis results and the characterization data of the grafted CNCs, collected from FTIR, TGA, DSC, UV/Vis, Raman spectrum and electron microscopy are presented and discussed.
Mattson, Philip J. "Sputtering of chemisorbed nitrogen from the (100)--planes of tungsten and molybdenum: a comparison of computer simulation and experimental results". Thesis, 1986. http://hdl.handle.net/10945/22117.
Pełny tekst źródłaWeymouth, Alfred John. "Scanning Tunneling Microscopy Studies of Small Aromatic Molecules on Semiconductor Surfaces". Thesis, 2009. http://hdl.handle.net/1974/7328.
Pełny tekst źródłaThesis (Ph.D, Physics, Engineering Physics and Astronomy) -- Queen's University, 2009-09-11 10:14:10.118