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- W189492505 abstract "Room temperature nuclear magnetic resonance (NMR) lineshapes are presented for cluster-assembled nanophase Cu and Ag with various grain sizes as measured using TEM. Both the {sup 65}Cu and {sup 63}Cu resonances are measured and compared. Both Cu isotopes are subject to Knight shifts and to couplings to the electric field gradients in the sample. The Cu NMR spectra have a strong central response which is broader but with an average Knight shift virtually identical to a large trained Cu sample. Though measureable signals can be seen for over a MHz, there is no evidence of Cu signal intensity centered at the non-Knight shifted (e.g. insulating) frequency. The Ag signals are measured at a much lower frequency and have reduced sensitivity but, since Ag has a nuclear spin of 1/2, the couplings to the electric field gradients are not present. The results are discussed in terms of predictions made using simple structural models." @default.
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- W189492505 date "1992-12-01" @default.
- W189492505 modified "2023-09-25" @default.
- W189492505 title "NMR spectra of cluster-assembled nanophase metals" @default.
- W189492505 hasPublicationYear "1992" @default.
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