Surface Chemistry Studies of Quantum Dots (QDs) Modified with Surfactants

Guodong Sui, Jhony Orbulescu, Xiaojun Ji, Kerim M. Gattás-Asfura, Roger M. Leblanc, Miodrag Micic

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Since luminescent CdSe quantum dots (QDs) have shown great potential in biological labeling, the surface chemistry behavior of QDs at interfaces is of great research interest. In the present study, CdSe QDs with green luminescence were modified with hydrophobic chains of varying lengths [from C6 to C18]. These modified QDs can be utilized to form stable monolayers at the air/water interface. Surface pressure-area isotherms of modified QDs have been measured and limiting molecular areas have also been extrapolated in order to analyze the size of the QDs. UV absorption spectra of modified QDs at various surface pressures were also determined. Surface chemistry, as well as the topographic properties, of modified QDs in Langmuir and L-B films was discussed.

Original languageEnglish (US)
Pages (from-to)123-133
Number of pages11
JournalJournal of Cluster Science
Volume14
Issue number2
DOIs
StatePublished - Jun 1 2003

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Keywords

  • Air/water interface
  • CdSe
  • ESEM
  • Molecular area
  • Monolayer
  • QDs
  • Surface pressure

ASJC Scopus subject areas

  • Inorganic Chemistry

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