The optical properties of ultra-thin films fabricated by layer-by-layer adsorption process depending on dipping time

Shiro Fujita, Seimei Shiratori

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The layer-by-layer (LBL) self-assembled polyelectrolytes adsorption process is a very slow process. For the fabrication of low-cost application, fabrication time must be decreased. In this work, we measured optical properties of poly(acrylic acid) (PAA)/poly(allylamine hydrochloride) (PAH) thin films depending on deposition time and added impurities. As dipping time was short from 900 s to 180 s, thickness was almost the same. The reason for this was that adsorption quantity was almost the same between 900 s and 180 s from frequency shift of the quartz crystal microbalance measurement. When dipping time was 900 s and 180 s, the refractive index dispersion curves were different before HCl treatment. However, the refractive index dispersion curves were almost the same after HCl treatment. The total fabrication time of the anti-reflection (AR) film decreased from about 6 h (dipping time 900 s) to 2 h (dipping time 180 s), three times faster. Luminous reflection of the film decreased from 0.5 to 0.2, performing 2.5 times better. We propose a high-performance AR film fabrication method for LBL process by the optimization of the film thickness.

Original languageEnglish
Pages (from-to)54-60
Number of pages7
JournalThin Solid Films
Volume499
Issue number1-2
DOIs
Publication statusPublished - 2006 Mar 21

Fingerprint

Ultrathin films
dipping
Optical properties
optical properties
Adsorption
Fabrication
adsorption
carbopol 940
thin films
Refractive index
fabrication
Quartz crystal microbalances
Polyelectrolytes
Acrylics
Film thickness
refractivity
Impurities
Thin films
hydrochlorides
acrylic acid

Keywords

  • Anti-reflection film
  • Layer-by-layer
  • Microporous
  • Polyelectrolyte

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

The optical properties of ultra-thin films fabricated by layer-by-layer adsorption process depending on dipping time. / Fujita, Shiro; Shiratori, Seimei.

In: Thin Solid Films, Vol. 499, No. 1-2, 21.03.2006, p. 54-60.

Research output: Contribution to journalArticle

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