title: Nanocrystalline hydroxyapatite prepared under various pH conditions.
abstract: Hydroxyapatite (HAP) has sovereign biomedical application due to its excellent biocompatibility, chemical and crystallographic similitude with natural human bone. In this present work, we discussed about the role of pH in the synthesis of calcium phosphate compound using calcium nitrate tetrahydrate and di-ammonium hydrogen phosphate as starting materials by chemical precipitation method assisted with ultrasonic irradiation technique. 5% polyethylene glycol (PEG600) is added along with the precursors under various pH condition of 7, 9 and 11 respectively. The functional group analysis, crystallized size and fraction of crystallized size are confirmed using Fourier Transformation Infra-Red spectroscopy and X-ray diffraction pattern. Morphological observations are done by scanning electron microscope. The results revealed the presence of nanocrystalline hydroxyapatite at pH above 9.
authors.affiliation: School of Advanced Sciences, VIT University, Vellore 632014, Tamil Nadu, India.
authors.forename: R
authors.initials: R
authors.lastname: Palanivelu
authors.affiliation: School of Advanced Sciences, VIT University, Vellore 632014, Tamil Nadu, India.
authors.forename: A
authors.initials: A
authors.lastname: Mary Saral
authors.affiliation: School of Advanced Sciences, VIT University, Vellore 632014, Tamil Nadu, India. Electronic address: arubankumarvit@gmail.com.
authors.forename: A
authors.initials: A
authors.lastname: Ruban Kumar
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D017610:Calcium Compounds / Q000737:chemistry; D011232:Chemical Precipitation; D017886:Durapatite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D009566:Nitrates / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014465:Ultrasonics; D014961:X-Ray Diffraction
chemical_list: D001672:Biocompatible Materials; D017610:Calcium Compounds; D009566:Nitrates; D010710:Phosphates; C024788:ammonium phosphate; D011092:Polyethylene Glycols; D017886:Durapatite; C059948:calcium nitrate
keywords: Biocompatibility; Nanocrystalline; Polyethylene glycol; Ultrasonic irradiation