title: Nuclear acoustic resonance in fluids using piezoelectric nanoparticles.
abstract: The influence of acoustic radiation in the form of ultrasound (US) on the nuclear magnetic resonance (NMR) signal of liquids in the presence of piezo- and ferroelectric nanoparticles was investigated. The NMR resonances of 1H and 23Na were influenced by US with a frequency of omega(US)=18.26 MHz. For hydrogen, US with a frequency omega(US)=omega(0) was used where omega(0) is the Larmor frequency of 18.26 MHz. For sodium, US with a frequency omega(US)=2omega(0,Na) was used with omega(0,Na)=9.13 MHz. A detailed description of nanoparticle properties and sample preparation is given. The influence of US on the spin-lattice relaxation time T(1) was determined with an inversion recovery sequence for different concentrations of PZT. An elongation of T(1) of (1)H by 1.7% at a PZT concentration of 0.05% and an elongation of T(1) of (23)Na by 3% at a PZT concentration of 0.04% was observed. The elongation scales with the concentration of the PZT. An possible explanation of the effect of elongation is discussed.
authors.affiliation: Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, 53115 Bonn, Germany. mende@hiskp.uni-bonn.de
authors.forename: J
authors.initials: J
authors.lastname: Mende
authors.forename: N
authors.initials: N
authors.lastname: Elmiladi
authors.forename: C
authors.initials: C
authors.lastname: Höhl
authors.forename: K
authors.initials: K
authors.lastname: Maier
mesh_terms: D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects*; D011829:Radiation Dosage; D012996:Solutions / Q000737:chemistry* / Q000528:radiation effects*; D013010:Sonication
chemical_list: D012996:Solutions