Enhanced photocurrents generated by supramolecular relay/CdS-nanoparticle/ electron-donor structures on gold electrodes

Ran Tel-Vered*, Huseyin Bekir Yildiz, Itamar Willner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

An experiment was conducted to demonstrate the supramolecular organization of an electron-relay/CdS-NP/electron-donor assembly on an electrode surface. A dioctyl sulfosuccinate sodium salt (AOT)/n-heptane water-in-oil microemulsion was prepared by the solubilization of 3.5 mL distilled water in 100mL n-heptane in the presence of AOT as surfactant. The resulting mixture was separated into 60 and 40mL subvolumes. Aqueous solutions of Cd and Na25 were added to the 60 and 40mL subvolumes, and then mixed and stirred for 1 hour to yield the NPs. Pyridine was then added, and the resulting precipitate was centrifuged and washed with n-heptane, petrol ether, butanol, and methanol. The organized structure enabled an electron-transfer cascade that led to effective charge separation and to efficient generation of photocurrents. It was also observed that the supramolecular association of I-3 to the β-CD cavity plays an important role in the generation of the photocurrent.

Original languageEnglish
Pages (from-to)716-720
Number of pages5
JournalAdvanced Materials
Volume21
Issue number6
DOIs
StatePublished - 9 Feb 2009

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