Colloid surface engineering via deposition of multilayered thin films from polyelectrolyte blend solutions

Heng Pho Yap, John F. Quinn, Sok Mian Ng, Jinhan Cho, Frank Caruso

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

Multilayer thin films were constructed on polystyrene colloidal particles by depositing alternating layers of poly(allylamine hydrochloride) (PAH) at pH 7.5 and varying composition blends of poly(acrylic acid) (PAA) and poly(styrenesulfonate) (PSS) at pH 3.5. Following the deposition of each layer, microelectrophoresis experiments showed alternating ζ-potentials, suggesting the formation of multilayered films on the particles. Scanning and transmission electron microscopy were used to examine the surface morphology of the colloidal particles, with homogeneous surface coatings apparent for films deposited from PAA/PSS blend solutions containing up to 90 wt % PAA. The colloidal stability of these particles is greater than those coated with individual PAH and PAA layers. In the case of the blend PAA/PSS = 25:75 wt %, up to 20 layers were assembled without compromising the colloidal stability of the dispersion. The results demonstrate that the deposition of layers from PE blend solutions containing a strong and weak PE can be used as a facile method for controlling the surface properties and hence the colloidal stability of core-shell particles, as well as the thickness and morphology of the coatings. Control of these parameters is important for subsequent processing and application of these particles in controlled delivery, photonics, catalytic, and separation applications.

Original languageEnglish
Pages (from-to)4328-4333
Number of pages6
JournalLangmuir
Volume21
Issue number10
DOIs
Publication statusPublished - 2005 May 10
Externally publishedYes

Fingerprint

Colloids
Polyelectrolytes
colloids
carbopol 940
engineering
Polycyclic aromatic hydrocarbons
Thin films
thin films
Optics and Photonics
Coatings
Scanning Transmission Electron Microscopy
Surface Properties
Multilayer films
Polystyrenes
polycyclic aromatic hydrocarbons
Photonics
Acrylics
Surface properties
Surface morphology
Transmission electron microscopy

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Colloid surface engineering via deposition of multilayered thin films from polyelectrolyte blend solutions. / Yap, Heng Pho; Quinn, John F.; Ng, Sok Mian; Cho, Jinhan; Caruso, Frank.

In: Langmuir, Vol. 21, No. 10, 10.05.2005, p. 4328-4333.

Research output: Contribution to journalArticle

Yap, Heng Pho ; Quinn, John F. ; Ng, Sok Mian ; Cho, Jinhan ; Caruso, Frank. / Colloid surface engineering via deposition of multilayered thin films from polyelectrolyte blend solutions. In: Langmuir. 2005 ; Vol. 21, No. 10. pp. 4328-4333.
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