Molecular self-diffusion in internal magnetic fields of porous medium investigated by NMR MGSE method

Stepišnik, Janez (avtor), Ardelean, Ioan (avtor), Mohorič, Aleš (avtor)

Inhomogeneous magnetic fields generated in porous media due to differences in magnetic susceptibility at solid/liquid interfaces and due to intrinsic or artificially doped magnetic impurities can be used to gain insight into the molecular dynamics of fluid in the structure of a porous medium using the concept of NMR modulated gradient spin echo method. We extended the theory of this method to the case of an inhomogeneous magnetic field that cannot be approximated by an uniform gradient, in order to explain the CPMG measurements of self-diffusion in water soaked ceramics, which are doped with magnetic impurities of different contents. The new interpretation provides the spin relaxation times, the average pore size and their distribution, as well as the strength of the internal magnetic gradient fields in the doped ceramics.

• Jezik: Angleški jezik
• Ključne besede: nuclear magnetic resonance, MGSE method, magnetic field, magnetic susceptibility, self-diffusion, porous media, NMR spin echo, self-diffusion measurement, very in-homogeneous magnetic field, molecular velocity auto-correlation, magnetic impurities
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 10 str.
• Številčenje: Vol. 328, art. 106981
• PID: 20.500.12556/RUL-138677
• UDK: 537.635
• ISSN pri članku: 1090-7807
• DOI: 10.1016/j.jmr.2021.106981
• COBISS.SI-ID: 62304515
• Datum objave v RUL: 09.08.2022

Gradivo je del revije

• Naslov: Journal of magnetic resonance
• Skrajšan naslov: J. magn. reson.
• Založnik: Elsevier
• ISSN: 1090-7807
• COBISS.SI-ID: 562788

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: jedrska magnetna resonanca, metoda MGSE, magnetno polje, magnetna susceptibilnost, lastna difuzija, porozne snovi

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P1-0060
• Naslov: Eksperimentalna biofizika kompleksnih sistemov in slikanje v biomedicini

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: Romania, National Authority for Scientific Research
• Številka projekta: PN-III-P4-ID-PCE-2020-0533