Journal of Fluorescence

, Volume 23, Issue 6, pp 1287–1292 | Cite as

Efficient Entrapment of Dye in Hollow Silica Nanoparticles: Direct Evidence Using Fluorescence Spectroscopy

  • Arabinda Baruah
  • Sandeep Kumar
  • Sonalika Vaidya
  • Ashok K. Ganguli


Using hollow silica nanoparticles we demonstrate a simple and highly efficient way of removing hydrophilic dye (Rhodamine B) from water by encapsulation within these hollow spheres. The hollow silica spheres were obtained by using a surfactant templated procedure. Using fluorescence spectroscopy, we also show the evidence of the dye being absorbed within the hollow core of the silica shell (which is crucial for many applications) and differentiate from the adsorption of dye on the surface of the silica shell. It was found that that up to 94 % of the hydrophilic dye could be entrapped using these hollow shells within 72 h of exposure. Fluorescence spectroscopy shows a red shift in the dye encapsulated in the hollow silica which is due to aggregation of the dye and enables us to follow quantitatively the uptake of the dye molecules by the silica shells with time. The evidence for the encapsulation of the dye in these hollow spheres was reinforced by carrying out a comparative study, using solid silica particles.

Evidence of encapsulation of dye in hollow silica by fluorescence spectroscopy


Hollow silica Rhodamine B Entrapment Fluorescence spectroscopy Red shift Encapsulation 



A.K.G. thanks the Department of Science & Technology, Govt. of India, and DEITY, Govt. of India, for financial support. A.B.. thanks UGC for a fellowship.

Supplementary material

10895_2013_1262_MOESM1_ESM.docx (65 kb)
Figure S1 PXRD pattern of hollow silica particles. (DOCX 64 kb)


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Arabinda Baruah
    • 1
  • Sandeep Kumar
    • 1
  • Sonalika Vaidya
    • 2
  • Ashok K. Ganguli
    • 1
    • 3
  1. 1.Department of ChemistryIndian Institute of Technology DelhiNew DelhiIndia
  2. 2.Department of Chemistry, Hindu CollegeUniversity of DelhiDelhiIndia
  3. 3.Institute of Nano Science & TechnologyHabitat CentreMohaliIndia

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