Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 414, Issue -, Pages 504-511Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2012.08.006
Keywords
Gold nanoparticle; Polystyrene microsphere; Heterocoagulation; Structural control; Colloid thermodynamics
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Funding
- Fundamental Research Funds for the Central Universities [JUSRP111A05]
- National Natural Science Foundation of China [21204030, 51133002]
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Gold nanoparticles-coated polystyrene (AuNPs-coated PS) composite particles with raspberry-like morphology are successfully prepared by blending the preformed aqueous dispersions of PS microspheres and AuNPs based on colloid thermodynamics. A series of thermodynamic factors is systematically investigated for the influence on the heterocoagulation between the PS microspheres and AuNPs. The synthesized AuNPs-coated PS composite particles have been extensively characterized by scanning electron microscopy, transmission electron microscopy, thermogravimetry and zeta potential measurement. The results indicate that the structure and morphology of the resultant AuNPs-coated PS composite particles are significantly affected by the amount of poly(vinylpyrrolidone), the pH and composition of medium. (c) 2012 Elsevier B.V. All rights reserved.
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