The initial growth of ultra-thin films fabricated by a weak polyelectrolyte layer-by-layer adsorption process

Shiro Fujita, Seimei Shiratori

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

A weak polyelectrolyte layer-by-layer self-assembled multilayer has several morphologies depending on solution pH, including the morphology of poly(allylamine hydrochloride) (PAH) pH 7.5/poly(acrylic acid) (PAA) pH 3.5, which is called texture structure. We confirmed the initial growth of a weak polyelectrolyte layer-by-layer (LBL) multilayer in a stepwise adsorption process. The growth states of bilayers from 0.5 to 4.0 and over 4.5 were different when measured by quartz crystal microbalance (QCM), scanning electron microscopy (SEM), atomic force microscopy (AFM), x-ray photoelectron spectroscopy (XPS) and contact angle measurements. The texture structure appeared in 1.0 bilayer, after PAA adsorption. The initial growth was changed around 4.0 bilayers. In this phenomenon, the LBL layer of PAH pH 7.5/PAA pH 3.5 had two zones at least, similar to a strong polyelectrolyte LBL layer.

Original languageEnglish
Pages (from-to)1821-1827
Number of pages7
JournalNanotechnology
Volume16
Issue number9
DOIs
Publication statusPublished - 2005 Sep 1

Fingerprint

Ultrathin films
Polyelectrolytes
carbopol 940
Polycyclic aromatic hydrocarbons
Adsorption
adsorption
Multilayers
thin films
Textures
Quartz crystal microbalances
Angle measurement
Photoelectron spectroscopy
Acrylics
Contact angle
Atomic force microscopy
polycyclic aromatic hydrocarbons
X rays
Scanning electron microscopy
Acids
textures

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

The initial growth of ultra-thin films fabricated by a weak polyelectrolyte layer-by-layer adsorption process. / Fujita, Shiro; Shiratori, Seimei.

In: Nanotechnology, Vol. 16, No. 9, 01.09.2005, p. 1821-1827.

Research output: Contribution to journalArticle

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