Fabrication of Hydroxyapatite Nanofibers with High Aspect Ratio via Low-Temperature Wet Precipitation Methods Under Acidic Conditions

Abstract

HAp nanofibers (or whiskers) have been attracted considerable attention for their application as adsorbents and reinforcing fillers owing to their unique morphologies. However, fabrication of HAp nanofibers has been limited to high-temperature and/or long-term methods. Herein, we report that HAp nanofibers with more than 5 $μ$m in length (aspect ratio >100) can be easily obtained by a simple wet precipitation method without additives at relatively low temperature (80 {\textdegree}C) under acidic conditions (initial pH of 6.5 and final pH of 3.9), without pH control during the precipitation.