Construction of semiconductor nanoparticle layers on gold by self-assembly technique

Takuya Nakanishi, Bunsho Ohtani, Kohei Uosaki

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Cadmium sulfide (CdS) nanoparticles were prepared using the Aerosol-OT (AOT)/heptane inverse-micelle method. The particle size was controlled by changing the [H2O]/[AOT] ratio in the preparation process to be ca. 3 nm, which was estimated from their absorption maximum (ca. 385 nm) and absorption edge (ca. 450 nm) in heptane solutions. Self-assembled monolayers (SAMs) of α,ω-dithiols were prepared on (111)-oriented gold substrates. They were highly stable in aqueous solutions and showed a blocking effect toward electron exchange between the gold substrate and the electroactive species in the solution. Mono- and multi-layers of CdS nanoparticles were prepared by immersing the SAM-covered gold substrates in a heptane solution containing CdS particles. Infrared reflection-absorption spectra revealed that CdS particles on SAMs were surrounded by AOT and that a sequential immmersion procedure led to the alternately layered structure of CdS particles and dithiol molecules.

Original languageEnglish
Pages (from-to)4053-4056
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume36
Issue number6 SUPPL. B
Publication statusPublished - 1997 Jun
Externally publishedYes

Fingerprint

Cadmium sulfide
cadmium sulfides
Self assembly
self assembly
Gold
Semiconductor materials
gold
Nanoparticles
Heptane
Self assembled monolayers
nanoparticles
heptanes
Aerosols
aerosols
thiols
Substrates
infrared reflection
Micelles
Particles (particulate matter)
Absorption spectra

Keywords

  • α,ω-dithiol
  • Aerosol-OT
  • Cadmium sulfide nanoparticle
  • Infrared reflection-absorption spectroscopy
  • Inverse micelle
  • Multi-layered structure
  • Self-assembled monolayer

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Construction of semiconductor nanoparticle layers on gold by self-assembly technique. / Nakanishi, Takuya; Ohtani, Bunsho; Uosaki, Kohei.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 36, No. 6 SUPPL. B, 06.1997, p. 4053-4056.

Research output: Contribution to journalArticle

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