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

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


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 languageEnglish (US)
Pages (from-to)7543-7549
Number of pages7
JournalJournal of physical chemistry
Issue number19
StatePublished - 1990

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry


Dive into the research topics of 'Ultrasmall particles of CdSe and CdS formed in Nafion by an ion-dilution technique'. Together they form a unique fingerprint.

Cite this