Ultrasmall particles of CdSe and CdS formed in Nafion by an ion-dilution technique

Eugene S. Smotkin; R. Malcolm Brown; L. K. Rabenberg; K. Salomon; Allen J. Bard; Alan Campion; Marye Anne Fox; Thomas E. Mallouk; Stephen E. Webber; John M. White

doi:10.1021/j100382a044

Ultrasmall particles of CdSe and CdS formed in Nafion by an ion-dilution technique

Eugene S. Smotkin, R. Malcolm Brown, L. K. Rabenberg, K. Salomon, Allen J. Bard, Alan Campion, Marye Anne Fox, Thomas E. Mallouk, Stephen E. Webber, John M. White

Chemistry

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53 Scopus citations

Abstract

The transition of semiconductor chalcogenides from molecular CdX (X = Se, S) to bulk material has been observed in Nafion, a cation-exchange membrane. The two-phase structure of Nafion, consisting of a hydrophobic region and ionic clusters, has been utilized to form ultrasmall particles of CdS/Se by using a technique analogous to an inverted micelle microemulsion method, where the Cd ion/ionomer cluster ratio is controlled by diluting the cadmium-exchange solution with an inert ion (Ca²⁺). The absorption onset for the cadmium chalcogenides formed can be tuned over a range of more than 3.5 eV by varying the Cd²⁺/Ca²⁺ ratio in the solution used to exchange the acidic form of the ionomer membrane.

Original language	English (US)
Pages (from-to)	7543-7549
Number of pages	7
Journal	Journal of physical chemistry
Volume	94
Issue number	19
DOIs	https://doi.org/10.1021/j100382a044
State	Published - 1990

All Science Journal Classification (ASJC) codes

Engineering(all)
Physical and Theoretical Chemistry

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10.1021/j100382a044

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title = "Ultrasmall particles of CdSe and CdS formed in Nafion by an ion-dilution technique",

abstract = "The transition of semiconductor chalcogenides from molecular CdX (X = Se, S) to bulk material has been observed in Nafion, a cation-exchange membrane. The two-phase structure of Nafion, consisting of a hydrophobic region and ionic clusters, has been utilized to form ultrasmall particles of CdS/Se by using a technique analogous to an inverted micelle microemulsion method, where the Cd ion/ionomer cluster ratio is controlled by diluting the cadmium-exchange solution with an inert ion (Ca2+). The absorption onset for the cadmium chalcogenides formed can be tuned over a range of more than 3.5 eV by varying the Cd2+/Ca2+ ratio in the solution used to exchange the acidic form of the ionomer membrane.",

author = "Smotkin, {Eugene S.} and Brown, {R. Malcolm} and Rabenberg, {L. K.} and K. Salomon and Bard, {Allen J.} and Alan Campion and Fox, {Marye Anne} and Mallouk, {Thomas E.} and Webber, {Stephen E.} and White, {John M.}",

year = "1990",

doi = "10.1021/j100382a044",

language = "English (US)",

volume = "94",

pages = "7543--7549",

journal = "Journal of physical chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

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TY - JOUR

T1 - Ultrasmall particles of CdSe and CdS formed in Nafion by an ion-dilution technique

AU - Smotkin, Eugene S.

AU - Brown, R. Malcolm

AU - Rabenberg, L. K.

AU - Salomon, K.

AU - Bard, Allen J.

AU - Campion, Alan

AU - Fox, Marye Anne

AU - Mallouk, Thomas E.

AU - Webber, Stephen E.

AU - White, John M.

PY - 1990

Y1 - 1990

N2 - The transition of semiconductor chalcogenides from molecular CdX (X = Se, S) to bulk material has been observed in Nafion, a cation-exchange membrane. The two-phase structure of Nafion, consisting of a hydrophobic region and ionic clusters, has been utilized to form ultrasmall particles of CdS/Se by using a technique analogous to an inverted micelle microemulsion method, where the Cd ion/ionomer cluster ratio is controlled by diluting the cadmium-exchange solution with an inert ion (Ca2+). The absorption onset for the cadmium chalcogenides formed can be tuned over a range of more than 3.5 eV by varying the Cd2+/Ca2+ ratio in the solution used to exchange the acidic form of the ionomer membrane.

AB - The transition of semiconductor chalcogenides from molecular CdX (X = Se, S) to bulk material has been observed in Nafion, a cation-exchange membrane. The two-phase structure of Nafion, consisting of a hydrophobic region and ionic clusters, has been utilized to form ultrasmall particles of CdS/Se by using a technique analogous to an inverted micelle microemulsion method, where the Cd ion/ionomer cluster ratio is controlled by diluting the cadmium-exchange solution with an inert ion (Ca2+). The absorption onset for the cadmium chalcogenides formed can be tuned over a range of more than 3.5 eV by varying the Cd2+/Ca2+ ratio in the solution used to exchange the acidic form of the ionomer membrane.

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JO - Journal of physical chemistry

JF - Journal of physical chemistry

IS - 19

ER -

Ultrasmall particles of CdSe and CdS formed in Nafion by an ion-dilution technique

Abstract

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