Characterization of vapor-deposited l-leucine nanofilm

Masaki Hada, Kazuya Ichiki, Jiro Matsuo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

X-ray reflective measurements (XRR), atomic force microscopy and single wavelength ellipsometry were used to investigate the optical properties of thin l-leucine films deposited onto silicon substrates. The ellipsometry data (Ψ,Δ) were fitted with a four-layer-model, and the optical refractive index of the l-leucine film measured with ellipsometry was determined to be 1.37. With the conventional effective medium approximation theory and the ellipsometry results, the density of the l-leucine nanofilm was determined to be 70% (0.81 g/cm3) of crystalline l-leucine. This value was in good agreement with the density of 69% (0.80 g/cm3) obtained with XRR measurement. The ellipsometry measurements also enabled us to estimate the surface roughness or absorption layer of the film. This procedure of combined XRR and ellipsometry measurements could be a powerful tool for the determination of the (otherwise hard-to-determine) refractive index in thin organic material films with a rough surface layer.

Original languageEnglish
Pages (from-to)1993-1997
Number of pages5
JournalThin Solid Films
Volume519
Issue number6
DOIs
Publication statusPublished - Jan 3 2011
Externally publishedYes

Fingerprint

leucine
Ellipsometry
Leucine
ellipsometry
Vapors
vapors
X rays
Refractive index
Approximation theory
refractivity
Silicon
x rays
organic materials
Atomic force microscopy
Optical properties
Surface roughness
surface layers
surface roughness
Crystalline materials
Wavelength

Keywords

  • Amino acid
  • Optical properties
  • Surface roughness
  • X-ray reflective analysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Characterization of vapor-deposited l-leucine nanofilm. / Hada, Masaki; Ichiki, Kazuya; Matsuo, Jiro.

In: Thin Solid Films, Vol. 519, No. 6, 03.01.2011, p. 1993-1997.

Research output: Contribution to journalArticle

Hada, M, Ichiki, K & Matsuo, J 2011, 'Characterization of vapor-deposited l-leucine nanofilm', Thin Solid Films, vol. 519, no. 6, pp. 1993-1997. https://doi.org/10.1016/j.tsf.2010.10.011
Hada, Masaki ; Ichiki, Kazuya ; Matsuo, Jiro. / Characterization of vapor-deposited l-leucine nanofilm. In: Thin Solid Films. 2011 ; Vol. 519, No. 6. pp. 1993-1997.
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