Growth of one-dimensional single-crystalline hydroxyapatite nanorods

► Facile growth of 1-D hydroxyapatite nanorods without template/surfactant. ► Sodium bicarbonate as pH buffering. ► Nanostructures with length of several hundred nanometers and aspect ratio up to ∼20. ► Single-crystalline, high homogeneity and purity. ► Potential applications in dentistry, medicine and biocomposites.