Mesoporous silica formation on hydroxyapatite nanoparticles

The additive effect of TEOS and CTAB on the HAp crystal growth and HAp/silica hybrid shape was investigated. The mesoporous silica formation on the HAp nanoparticles was successfully achieved, and the SBET and RBJH values were changed with the feed Ca/P ratio. The HAp/silica hybrids exhibited the higher SBET values with the mesopores. It was suggested that the silica phase specifically interacted with the a-plane of HAp and subsequently the HAp along with the c-axis direction to be anisotropic hybrid shapes.