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Journal of Materials Science

, Volume 53, Issue 5, pp 3210–3224 | Cite as

Characterization of hollow silica–polyelectrolyte composite nanoparticles by small-angle X-ray scattering

  • Haoya Han
  • Li LiEmail author
  • Qingsong Yang
  • Yuchuan Tian
  • Yunwei Wang
  • Zhishuang Ye
  • Regine von Klitzing
  • Xuhong GuoEmail author
Ceramics

Abstract

Hollow silica–polyelectrolyte composite nanoparticles were prepared using templates of spherical polyelectrolyte brushes which consist of a polystyrene (PS) core and a densely grafted linear poly(acrylic acid) shell. The obtained hollow particles were systematically studied by small-angle X-ray scattering (SAXS) in combination with other characterization methods such as transmission electron microscopy and dynamic light scattering. The hollow structure formed by dissolving the PS core was confirmed by the reduction of electron density to zero in the cavity through fitting SAXS data. SAXS revealed both the inward and outward expansions of the hollow silica–polyelectrolyte composite particles upon increasing pH from 3 to 9, while further increasing pH led to the partial dissolution of silica layer and even destruction of the hollow structure. SAXS was confirmed to be a unique and powerful characterization method to observe hollow silica nanoparticles, which should be ideal candidates for controlled drug delivery.

Notes

Acknowledgements

We gratefully thank the financial support from the NSFC Grants (51273063 and 21476143), the Fundamental Research Funds for the Central Universities, 111 Project Grant (B08021), Shanghai Synchrotron Radiation Facility, and the China Scholarship Council.

Compliance with ethical standards

Conflicts of interest

There are no conflicts of interest to declare.

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Copyright information

© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.State Key Laboratory of Chemical EngineeringEast China University of Science and TechnologyShanghaiPeople’s Republic of China
  2. 2.Department of PhysicsTechnical University DarmstadtDarmstadtGermany
  3. 3.Engineering Research Center of Materials Chemical Engineering of Xinjiang BingtuanShihezi UniversityXinjiangPeople’s Republic of China

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