title: Raman scattering studies on PEG functionalized hydroxyapatite nanoparticles.
abstract: The pure hydroxyapatite (HAP) nanoparticles (NPs) have been synthesized by wet chemical precipitation method. Raman spectral measurements have been made for pure HAP, pure Polyethylene glycol (PEG) 6000 and PEG coated HAP in different mass ratios (sample 1, sample 2 and sample 3). The peaks observed in Raman spectrum of pure HAP and the XRD pattern have confirmed the formation of HAP NPs. Vibrational modes have been assigned for pure HAP and pure PEG 6000. The observed variation in peak position of Raman active vibrational modes of PEG in PEG coated HAP has been elucidated in this work, in terms of intermolecular interactions between PEG and HAP. Further these results suggest that the functionalization of nanoparticles may be independent of PEG mass.
authors.affiliation: Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai, Tamilnadu, India.
authors.forename: D
authors.initials: D
authors.lastname: Yamini
authors.forename: G
authors.initials: G
authors.lastname: Devanand Venkatasubbu
authors.forename: J
authors.initials: J
authors.lastname: Kumar
authors.forename: V
authors.initials: V
authors.lastname: Ramakrishnan
mesh_terms: D017886:Durapatite / Q000737:chemistry*; D008422:Materials Testing; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D011092:Polyethylene Glycols / Q000737:chemistry*; D013059:Spectrum Analysis, Raman
chemical_list: D011092:Polyethylene Glycols; D017886:Durapatite
keywords: Functionalization; Hydroxyapatite nanoparticle; Intermolecular interaction; Vibrational mode