Defect-related luminescence properties of hydroxyapatite nanobelts
Defect-related luminescence properties of hydroxyapatite nanobelts
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DOI：
10.1016/j.apmt.2020.100822
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发表时间：
2020-12
影响因子：
8.3
通讯作者：
Verónica J. Huerta;P. Fernández;V. Gómez;O. Graeve;M. Herrera
中科院分区：
文献类型：
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作者：
Verónica J. Huerta;P. Fernández;V. Gómez;O. Graeve;M. Herrera
在这项工作中，我们研究了与羟基磷灰石（HAp）纳米带中的点缺陷形成相关的可见光和近红外（NIR）发光的产生。通过改进的水热法在24、30和36 h的生长时间下合成了三种不同的HAp样品。透射电子显微镜测量显示，在较短时间内生长的纳米带中存在堆垛层错。X-射线衍射和拉曼光谱测量证实了样品的高结晶质量，显示出六方钙缺乏（Ca-D）HAp相，由X-射线光电子能谱和能量色散谱测量分别揭示的Ca/P比为1.2和1.3支持。电子顺磁共振、光致发光和阴极发光测量表明，HAp纳米带中氢氧根离子空位（VOH−）、钙空位（VCa）和氧空位（VO）的存在在可见光和NIR范围内产生强烈的发光。
In this work, we study the generation of visible and near-infrared (NIR) luminescence associated with the formation of point defects in hydroxyapatite (HAp) nanobelts. Three different HAp samples were synthesized by a modified hydrothermal method at growth times of 24, 30, and 36 h. Transmission electron microscopy measurements revealed the presence of stacking faults in the nanobelts grown during shorter times. X-ray diffraction and Raman spectroscopy measurements confirmed the high crystalline quality of the samples, showing a hexagonal calcium deficient (Ca-D) HAp phase, supported by the Ca/P ratio of 1.2 and 1.3 revealed by X-ray photoelectron spectroscopy and energy dispersive spectroscopy measurements, respectively. Electron paramagnetic resonance, photoluminescence, and cathodoluminescence measurements demonstrated the presence of hydroxyl ion vacancies (VOH−), calcium vacancies (VCa), and oxygen vacancies (VO) in HAp nanobelts generates a strong luminescence in the visible and NIR ranges.