title: Surface controlled calcium phosphate formation on three-dimensional bacterial cellulose-based nanofibers.
abstract: Studies on the early calcium phosphate (Ca-P) formation on nanosized substrates may allow us to understand the biomineralization mechanisms at the molecular level. In this work, in situ formation of Ca-P minerals on bacterial cellulose (BC)-based nanofibers was investigated, for the first time, using the X-ray absorption near-edge structure (XANES) spectroscopy. In addition, the influence of the surface coating of nanofibers on the formation of Ca-P minerals was determined. Combined with XRD analysis, XANES results revealed that the nascent precursor was ACP (amorphous calcium phosphate) which was converted to TCP (β-tricalcium phosphate), then OCP (octacalcium phosphate), and finally to HAP (hydroxyapatite) when phosphorylated BC nanofibers were the templates. However, the formation of nascent precursor and its transformation process varied depending on the nature of the coating material on nanofibrous templates. These results provide new insights into basic mechanisms of mineralization and can lead to the development of novel bioinspired nanostructured materials.
authors: School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China.
authors: Honglin
authors: H
authors: Luo
authors: School of Mechanical and Electrical Engineering, East China Jiaotong University, Nanchang, Jiangxi 330013, PR China.
authors: Guangyao
authors: G
authors: Xiong
authors: School of Optometry and Ophthalmology, Tianjin Medical University Eye Hospital, Tianjin 300384, PR China.
authors: Chen
authors: C
authors: Zhang
authors: School of Mechanical and Electrical Engineering, East China Jiaotong University, Nanchang, Jiangxi 330013, PR China.
authors: Deying
authors: D
authors: Li
authors: School of Chemical Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China.
authors: Yong
authors: Y
authors: Zhu
authors: School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China.
authors: Ruisong
authors: R
authors: Guo
authors: School of Materials Science and Engineering, Tianjin University, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300072, PR China. Electronic address: yzwantju@126.com.
authors: Yizao
authors: Y
authors: Wan
mesh_terms: D002130:Calcium Phosphates / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry; D008903:Minerals / Q000737:chemistry; D057139:Nanofibers / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry
chemical_list: D002130:Calcium Phosphates; D008903:Minerals; C519480:amorphous calcium phosphate; C485817:beta-tricalcium phosphate; C022045:octacalcium phosphate; D002482:Cellulose; D017886:Durapatite; C020243:calcium phosphate
keywords: Bacterial cellulose; Calcium phosphate; Nanofiber; Surface chemistry; X-ray absorption near-edge structure spectroscopy