eprintid: 10074395
rev_number: 22
eprint_status: archive
userid: 608
dir: disk0/10/07/43/95
datestamp: 2019-07-08 14:18:24
lastmod: 2021-09-17 22:27:16
status_changed: 2019-07-08 14:18:24
type: article
metadata_visibility: show
creators_name: Palombo, M
creators_name: Gabrielli, A
creators_name: De Santis, S
creators_name: Cametti, C
creators_name: Ruocco, G
creators_name: Capuani, S
title: Spatio-temporal anomalous diffusion in heterogeneous media by nuclear magnetic resonance
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F48
note: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: In this paper, we describe nuclear magnetic resonance measurements of water diffusion in highly confined and heterogeneous colloidal systems using an anomalous diffusion model. For the first time, temporal and spatial fractional exponents, α and μ, introduced within the framework of continuous time random walk, are simultaneously measured by pulsed gradient spin-echo NMR technique in samples of micro-beads dispersed in aqueous solution. In order to mimic media with low and high level of disorder, mono-dispersed and poly-dispersed samples are used. We find that the exponent α depends on the disorder degree of the system. Conversely, the exponent μ depends on both bead sizes and magnetic susceptibility differences within samples. The new procedure proposed here may be a useful tool to probe porous materials and microstructural features of biological tissue.
date: 2011-07-21
date_type: published
publisher: AIP Publishing
official_url: https://doi.org/10.1063/1.3610367
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
article_type_text: Journal Article
verified: verified_manual
elements_id: 1658749
doi: 10.1063/1.3610367
language_elements: English
lyricists_name: Palombo, Marco
lyricists_id: MPALO05
actors_name: Palombo, Marco
actors_id: MPALO05
actors_role: owner
full_text_status: public
publication: The Journal of Chemical Physics
volume: 135
number: 3
article_number: 034504
issn: 1089-7690
citation:        Palombo, M;    Gabrielli, A;    De Santis, S;    Cametti, C;    Ruocco, G;    Capuani, S;      (2011)    Spatio-temporal anomalous diffusion in heterogeneous media by nuclear magnetic resonance.                   The Journal of Chemical Physics , 135  (3)    , Article 034504.  10.1063/1.3610367 <https://doi.org/10.1063/1.3610367>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10074395/8/Palombo_Spatio-temporal%20anomalous%20diffusion%20in%20heterogeneous%20media%20by%20nuclear%20magnetic%20resonance_VoR.pdf