, Volume 65, Issue 5, pp 909–915 | Cite as

Interfacial properties of hybrid nanomaterials

  • Binil Itty Ipe
  • K. Yoosaf
  • K. George Thomas


A brief summary of our ongoing efforts to understand the surface properties of nanoparticles using fluorophores, namely pyrene alkanethiols, is presented. Excited state interactions were investigated by varying the length of the spacer group and the concentration of fluorophore. The flexible long alkyl chain tethering pyrene inAu-P2/Au-P3 allows free interaction between fluorophores resulting in excimer formation whereas the intermolecular interactions are limited in theAu-P 1 system due to the restriction imposed by the curvature of spherical gold nanoparticle. A gradual increase in the peak intensity ratio of III/I band of the normal fluorescence of pyrene was observed indicating that the surface of nanoparticle is more polar than the bulk solvent (toluene)


Gold nanoparticle pyrene surface polarity excited state 


61.82.Pv 61.82.Rx 42.70.Gi 


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Copyright information

© Indian Academy of Sciences 2005

Authors and Affiliations

  • Binil Itty Ipe
    • 1
  • K. Yoosaf
    • 1
  • K. George Thomas
    • 1
  1. 1.Photosciences and PhotonicsRegional Research Laboratory (CSIR)ThiruvananthapuramIndia

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