Low field Overhauser images of the formation process of a hydrogel

Wilson Barros Jr., Ricardo E. De Souza, M. Engelsberg, J.H. Ardenkjær-Larsen, Klaes Golman

Research output: Contribution to journalJournal articleResearchpeer-review


The gelation of sodium alginate by calcium ions is studied by proton-electron double resonance imaging in a magnetic field of only 16 mT using a newly developed free radical. The high sensitivity of the Overhauser enhancement to small variations in water mobility permits the detection of minute changes in gel composition. Spatial inhomogeneity and temporal evolution of this, and possibly other processes involving diffusion and chemical reaction, could be accurately monitored by this technique. © 2002 American Institute of Physics.
Original languageEnglish
JournalApplied Physics Letters
Issue number1
Pages (from-to)160-162
Publication statusPublished - 2002
Externally publishedYes


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