# Browse Dissertations and Theses - Physics by Subject "Nuclear magnetic resonance (NMR)"

• (1981)
We have studied the 77Se nuclear magnetic resonance spectra in a single crystal sample of 2H-TaSe2 to study the charge density wave (CDW) in this compound and to test a concept put forth by McMillan. We compare the temperature ...

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• (1983)

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• (1985)
The author has applied magnetic resonance to study the chemisorption of CO on supported platinum particles. The particles are 10 to 50 Ansgtrom in diameter, supported on alumina. CO is 90% enriched with 13CO. NMR data were ...

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• (1996)
This thesis describes NMR measurements involving carbon-13, deuterons, and protons in acetylene (C2H2) adsorbed at room temperature on supported platinum catalysts. Measurements from 77"K to 158°K of the spin-lattice ...

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• (2013-08-22)
The $^{13}$C NMR absorption lines in the organic superconductors $\kappa$-(BEDT-TTF)$_2$Cu[N(CN)$_2$]X, X~=~Br ($T_C=11.6$~K), Cl ($T_C=12.8$~K at 0.3~kbar) show an abrupt increase in the linewidth at 170~K at 9.4~T. This ...

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• (1991)
The author reports the study of diffusion of carbon monoxide on supported palladium and platinum clusters by Nuclear Magnetic Resonance. As part of these studies, a novel NMR technique for studying diffusion (called an ...

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• (1981)

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• (1965)
We have investigated the motional narrowing of the pure Cu resonance line, the shift of the line center with temperature, the line shift of liquid Cu, and of some Cu alloys as a function of composition. The peak-to-peak ...

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• (1974)
Nuc1ear resonances were 0 bserved f rom CU63 nuc1"e1 1n t he f'1rst f ew shells around Fe, Co, and Ni impurities in single crystals of their respective dilute alloys with copper. The resonances from these nuclei, ...

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• (1981)

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• (1972)

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• (1991)
We have used NMR to study the properties of promoted catalysts prepared by adding alkali metals (Na, K, Rb, or Cs) to silica supported Pt clusters. We have also examined the effect of the alkali metals on CO and C2H4 ...

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• (1989)
The author has observed, and studied quantum size effects in the NMR of small, supported platinum particles with a monolayer of carbon monoxide chemically adsorbed to the surface. The effects are observed in the 13c and ...

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• (1986)
The 13c and 17o NMR of CO chemisorbed on small particles of Pd and Pt has been observed. The 17o resonance represents the first reported NMR observation of a spin larger than 1/2 adsorbed on a metal surface. At low ...

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• (1987)
We report the study of supported Pt-Rh bimetallic catalysts by 195Pt NMR and by 13C NMR of adsorbed CO. The metal particles are sA-soA in diameter. Study of the dependence of the 13CO resonance position as a function of ...

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• (1984)
We have used NMR to determine the structure of acetylene (HC~CH) adsorbed at room temperature on small platinum particles by studying the l3c_13c, l3C_1H, and lH_1H dipolar interactions among the nuclei in the adsorbed ...

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• (1964-06)

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• (1986)
The author reports Nb93 NMR studies of the charge density wave (COW) conductor, NbSe3 , using aligned, multicrystalline samples, observing the NMR with and without current flow in the crystals. Above 144 K, where no ...

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• (1982)
We have used spin echoes to study the 93Nb NQR in 2H-NbSe2Fex. We measured (intensity)x(temperature), and T1P (spin-lattice relaxation parameter) and T2 (spin-spin relaxation time) as a function of temperature. Our data ...

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