@article {467,
	title = {Probing Cds Nanocrystal Surfaces with Laser-Polarized Xenon},
	journal = {Journal of Physical Chemistry},
	volume = {98},
	year = {1994},
	note = {J Phys Chem-UsPh559Times Cited:32Cited References Count:29},
	month = {Sep 22},
	pages = {9400-9404},
	abstract = {<p>This paper describes the application of optically pumped xenon NMR to probe the surface of semiconductor nanocrystals by physisorption at 123 K. These experiments were made possible by using highly spin ordered Xe-129, prepared by optical pumping and spin exchange of a rubidium xenon gas mixture, to increase the NMR signal strength. CdS nanocrystals were prepared by regulated growth in inverse micelles and precipitated by surface derivatization with thiophenol. Nanocrystals of 11.8, 12.8, and 23 Angstrom radii with 26\%, 63\%, and 57\% thiophenol surface coverage, respectively, were characterized. Within this sample parameter space, the Xe-129 spectra, recorded at varying xenon coverages, depended strongly on thiophenol surface coverage but were not sensitive to the crystallite size. In addition, the nanocrystals with low thiophenol coverage yielded a xenon line shape consisting of two components, interpreted as xenon signals arising from distinct surface domains. These domains are presumably formed by the aggregation of thiophenol molecules on the nanocrystal surface when the thiophenol coverage is incomplete, a model which is consistent with existing X-ray photoelectron spectroscopy and liquid state H-1 NMR data.</p>
},
	keywords = {resonance},
	isbn = {0022-3654},
	doi = {Doi 10.1021/J100089a008},
	url = {<Go to ISI>://WOS:A1994PH55900008},
	author = {Bowers, C. R. and Pietrass, T. and Barash, E. and Pines, A. and Grubbs, R. K. and Alivisatos, A. P.}
}
@article {482,
	title = {Cross Polarization from Laser-Polarized Solid Xenon to (Co2)-C-13 by Low-Field Thermal Mixing},
	journal = {Chemical Physics Letters},
	volume = {205},
	year = {1993},
	note = {Chem Phys LettKv519Times Cited:61Cited References Count:11},
	month = {Apr 9},
	pages = {168-170},
	abstract = {<p>The first observation of nuclear spin polarization enhancement in a molecular species by coupling to laser-polarized xenon is reported. The spins of (CO2)-C-13 were cooled by inclusion into the xenon solid followed by thermal mixing in magnetic fields comparable to the heteronuclear dipolar interactions. High-field NMR detection yielded enhancement factors of up to 200. Moreover, a change in the sense of the helicity of the optical pumping light results in a sign reversal of the spin temperature and hence an inversion of the C-13 NMR signal.</p>
},
	keywords = {nmr},
	isbn = {0009-2614},
	doi = {Doi 10.1016/0009-2614(93)89223-5},
	url = {<Go to ISI>://WOS:A1993KV51900008},
	author = {Bowers, C. R. and Long, H. W. and Pietrass, T. and Gaede, H. C. and Pines, A.}
}
@article {475,
	title = {High-Field Cross-Polarization Nmr from Laser-Polarized Xenon to a Polymer Surface},
	journal = {Journal of the American Chemical Society},
	volume = {115},
	year = {1993},
	note = {J Am Chem SocLx752Times Cited:77Cited References Count:16},
	month = {Sep 8},
	pages = {8491-8492},
	keywords = {gas},
	isbn = {0002-7863},
	doi = {Doi 10.1021/Ja00071a086},
	url = {<Go to ISI>://WOS:A1993LX75200086},
	author = {Long, H. W. and Gaede, H. C. and Shore, J. and Reven, L. and Bowers, C. R. and Kritzenberger, J. and Pietrass, T. and Pines, A. and Tang, P. and Reimer, J. A.}
}
