@article {franco2012electrospun,
	title = {Electrospun hydroxyapatite fibers from a simple sol{\textendash}gel system},
	journal = {Materials Letters},
	volume = {67},
	number = {1},
	year = {2012},
	pages = {233{\textendash}236},
	publisher = {Elsevier},
	abstract = {<p style="text-align:justify; font-size:12px; font-family:Helvetica">This work reports the production of hydroxyapatite (HA) sub-micron fibers by combining electrospinning and a non-alkoxide sol{\textendash}gel system, using cheap precursors. Phosphorus pentoxide (P2O5) and calcium nitrate tetrahydrate (Ca(NO3)2.4H2O) were used as precursors of phosphorus and calcium, respectively. The fibers were electrospun from a mixture of the gel formed from the system Ca(NO3)2.4H2O/P2O5 with polymeric solutions of polyvinylpyrrolidone (PVP) in water and ethanol/water mixtures. The fibers were analyzed for their morphology (Scanning Electron Microscopy, SEM), chemical composition (Fourier Transform Infrared Spectroscopy, FTIR) and structure (X-ray diffraction, XRD). The fibers obtained were composed mainly of type B carbonated HA with traces of β-tricalcium phosphate (β-TCP). SEM analysis revealed that increasing the concentration of water in the solvent system, used in the preparation of electrospinning solutions, led to fibers with smaller diameters and narrower diameter distribution.</p>
},
	url = {10.1016/j.matlet.2011.09.090},
	author = {Franco, Patr{\'\i}cia Q and Jo{\~a}o, Carlos and Silva, Jorge Carvalho and Borges, Jo{\~a}o Paulo}
}
