Controlled deposition of oriented PbS nanocrystals on ultrathin polydiacetylene templates at the air-solution interface

Amir Berman, Nataly Belman, Yuval Golan

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Lead sulfide nanocrystals with well-defined structure and orientation were obtained on ultrathin polydiacetylene (PDA) substrates, forming a unique hybrid functional material comprised of linear arrays of size-quantized semiconductor nanocrystals that are connected via conjugated polymer strand nanowires. The deposition was carried out at the liquid-gas interface by reacting aqueous solutions of PbCl2 with controlled amounts of H2S gas. Following nanocrystal deposition, the samples were transferred onto solid substrates using the Langmuir-Schaffer technique and characterized by atomic force microscopy (AFM), transmission electron microscopy (TEM), and electron diffraction. AFM showed that the Pb2+ concentration is the main parameter that affects the growth. TEM and electron diffraction indicated that the nanocrystals are aligned with the linear PDA film, with a uniaxial orientation relationship in which the <110>PbS direction is parallel to the linear direction of the polymer substrate.

Original languageEnglish
Pages (from-to)10962-10966
Number of pages5
JournalLangmuir
Volume19
Issue number26
DOIs
StatePublished - 23 Dec 2003

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