@article {302,
	title = {Multiphase imaging of gas flow in a nanoporous material using remote-detection NMR},
	journal = {Nature Materials},
	volume = {5},
	year = {2006},
	note = {Nat Mater029AOTimes Cited:25Cited References Count:40},
	month = {Apr},
	pages = {321-327},
	abstract = {<p>Pore structure and connectivity determine how microstructured materials perform in applications such as catalysis, fluid storage and transport, filtering or as reactors. We report a model study on silica aerogel using a time-of-flight magnetic resonance imaging technique to characterize the flow field and explain the effects of heterogeneities in the pore structure on gas flow and dispersion with Xe-129 as the gas-phase sensor. The observed chemical shift allows the separate visualization of unrestricted xenon and xenon confined in the pores of the aerogel. The asymmetrical nature of the dispersion pattern alludes to the existence of a stationary and a flow regime in the aerogel. An exchange time constant is determined to characterize the gas transfer between them. As a general methodology, this technique provides insights into the dynamics of flow in porous media where several phases or chemical species may be present.</p>
},
	keywords = {visualization},
	isbn = {1476-1122},
	doi = {Doi 10.1038/Nmat1598},
	url = {<Go to ISI>://WOS:000236530400024},
	author = {Harel, E. and Granwehr, J. and Seeley, J. A. and Pines, A.}
}
@article {315,
	title = {Microfluidic gas-flow profiling using remote-detection NMR},
	journal = {Proceedings of the National Academy of Sciences of the United States of America},
	volume = {102},
	year = {2005},
	note = {P Natl Acad Sci USA977NZTimes Cited:41Cited References Count:26},
	month = {Oct 18},
	pages = {14960-14963},
	abstract = {<p>We have used nuclear magnetic resonance (NMR) to obtain spatially and temporally resolved profiles of gas flow in microfluidic devices. Remote detection of the NMR signal both overcomes the sensitivity limitation of NMR and enables time-of-flight measurement in addition to spatially resolved imaging. Thus, detailed insight is gained into the effects of flow, diffusion, and mixing in specific geometries. The ability for noninvasive measurement of microfluidic flow, without the introduction of foreign tracer particles, is unique to this approach and is important for the design and operation of microfluidic devices. Although here we demonstrate an application to gas flow, extension to liquids, which have higher density, is implicit.</p>
},
	keywords = {mri},
	isbn = {0027-8424},
	doi = {Doi 10.1073/Pnas.0507566102},
	url = {<Go to ISI>://WOS:000232811800006},
	author = {Hilty, C. and McDonnell, E. E. and Granwehr, J. and Pierce, K. L. and Han, S. I. and Pines, A.}
}
