Nuclear acoustic resonance in fluids using piezoelectric nanoparticles.
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.
Mende
J
J
Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, 53115 Bonn, Germany. mende@hiskp.uni-bonn.de
Elmiladi
N
N
Höhl
C
C
Maier
K
K
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
D012996:Solutions