Details

Autor(en) / Beteiligte

• Dehn, M. H.
• Arseneau, D. J.
• Böni, P.
• Bridges, M. D.
• Buck, T.
• Cortie, D. L.
• Fleming, D. G.
• Kelly, J. A.
• MacFarlane, W. A.
• MacLachlan, M. J.
• McFadden, R. M. L.
• Morris, G. D.
• Wang, P.-X.
• Xiao, J.
• Zamarion, V. M.
• Kiefl, R. F.

Titel

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

Ist Teil von

• The Journal of chemical physics, 2016-11, Vol.145 (18), p.181102-181102

Ort / Verlag

United States: American Institute of Physics

Erscheinungsjahr

2016

Quelle

AIP Journals (American Institute of Physics)

Beschreibungen/Notizen

• 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.