کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5406773 1393188 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nuclear acoustic resonance in fluids using piezoelectric nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Nuclear acoustic resonance in fluids using piezoelectric nanoparticles
چکیده انگلیسی
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 ωUS=18.26MHz. For hydrogen, US with a frequency ωUS=ω0 was used where ω0 is the Larmor frequency of 18.26 MHz. For sodium, US with a frequency ωUS=2ω0,Na was used with ω0,Na=9.13MHz. A detailed description of nanoparticle properties and sample preparation is given. The influence of US on the spin-lattice relaxation time T1 was determined with an inversion recovery sequence for different concentrations of PZT. An elongation of T1 of 1H by 1.7% at a PZT concentration of 0.05% and an elongation of T1 of 23Na 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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 203, Issue 2, April 2010, Pages 203-207
نویسندگان
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