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Your search keyword '"Morris, GD"' showing total 2 results
Start Over Author "Morris, GD" Topic nanotechnology
2 results on '"Morris, GD"'

1. Local magnetic properties of a monolayer of Mn12 single molecule magnets.

Author

Salman Z, Chow KH, Miller RI, Morello A, Parolin TJ, Hossain MD, Keeler TA, Levy CD, MacFarlane WA, Morris GD, Saadaoui H, Wang D, Sessoli R, Condorelli GG, and Kiefl RF

Subjects
Computer Simulation, Computer-Aided Design, Equipment Design, Equipment Failure Analysis, Materials Testing, Nanostructures ultrastructure, Nanotechnology methods, Crystallization methods, Magnetics instrumentation, Manganese chemistry, Models, Chemical, Models, Molecular, Nanostructures chemistry, Nanotechnology instrumentation
Abstract

The magnetic properties of a monolayer of Mn12 single molecule magnets grafted onto a silicon (Si) substrate have been investigated using depth-controlled beta-detected nuclear magnetic resonance. A low-energy beam of spin-polarized radioactive 8Li was used to probe the local static magnetic field distribution near the Mn12 monolayer in the Si substrate. The resonance line width varies strongly as a function of implantation depth as a result of the magnetic dipolar fields generated by the Mn12 electronic magnetic moments. The temperature dependence of the line width indicates that the magnetic properties of the Mn12 moments in this low-dimensional configuration differ from bulk Mn12.

Published
2007
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2. Communication: Chemisorption of muonium on gold nanoparticles: A sensitive new probe of surface magnetism and reactivity

Author

Dehn, MH, Arseneau, DJ, Böni, P, Bridges, MD, Buck, T, Cortie, DL, Fleming, DG, Kelly, JA, MacFarlane, WA, MacLachlan, MJ, McFadden, RML, Morris, GD, Wang, P-X, Xiao, J, Zamarion, VM, and Kiefl, RF

Subjects
Physical Sciences, Engineering, Nanotechnology, Bioengineering, Chemical Sciences, Chemical Physics, Chemical sciences, Physical sciences
Abstract

Chemisorption of muonium onto the surface of gold nanoparticles has been observed. Muonium (μ+e-), a light hydrogen-like atom, reacts chemically with uncapped 7 nm gold nanoparticles embedded in mesoporous silica (SBA-15) with a strong temperature-dependent rate. The addition rate is fast enough to allow coherent spin transfer into a diamagnetic muon state on the nanoparticle surface. The muon is well established as a sensitive probe of static or slowly fluctuating magnetic fields in bulk matter. These results represent the first muon spin rotation signal on a nanoparticle surface or any metallic surface. Only weak magnetic effects are seen on the surface of these Au nanoparticles consistent with Pauli paramagnetism.

Published
2016

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