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      Cyclodextrin-assisted synthesis of tailored mesoporous silica nanoparticles

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      Author(s)
      Topuz, Fuat
      Uyar, Tamer
      Date
      2018
      Source Title
      Beilstein Journal of Nanotechnology
      Electronic ISSN
      2190-4286
      Publisher
      Beilstein-Institut Zur Forderung der Chemischen Wissenschaften
      Volume
      9
      Issue
      1
      Pages
      693 - 703
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Mesoporous silica nanoparticles (MSNs) have sparked considerable interest in drug/gene delivery, catalysis, adsorption, separation, sensing, antireflection coatings and bioimaging because of their tunable structural properties. The shape, size and pore structure of MSNs are greatly influenced by the type of additives used, e.g., solvent and pore-templating agent. Here, we studied the influence of cyclodextrin (CD) molecules on the formation of MSNs. The nanoparticles over 100 nm in diameter were synthesized by surfactant- templated, hydrolysis-polycondensation reactions in the presence of pristine CD (β-CD) or hydroxypropyl-functionalized CDs (HP-γ-CD and HP-β-CD). Depending on the formulation conditions, differently shaped MSNs, such as bean-like, spherical, ellipsoid, aggregate and faceted were generated. The morphology and size of MSNs varied with the CD-type used. Generally, spherical particles were obtained with β-CD, while a faceted morphology was observed for the particles synthesized using HP-CDs. The particle size could be tuned by adjusting the amount of CD used; increasing the CD concentration led to larger particles. MSNs synthesized in the presence of β-CD displayed a smaller particle size than those produced with HP-functional CDs. FTIR, TGA and solidstate 13C NMR demonstrated the adsorption of CDs on the particle surfaces. The proposed concept allows for the synthesis of silica nanoparticles with control over particle shape and size by adjusting the concentration of additives in a simple, one-pot reaction system for a wide range of applications.
      Keywords
      Cyclodextrin
      Faceted particles
      Mesoporous silica nanoparticles (MSN)
      Microporous
      Permalink
      http://hdl.handle.net/11693/50441
      Published Version (Please cite this version)
      https://doi.org/10.3762/bjnano.9.64
      Collections
      • Institute of Materials Science and Nanotechnology (UNAM) 2260
      • Nanotechnology Research Center (NANOTAM) 1179
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