在电子和离子束下,Hydroxyapatite中的缺陷选择性发光
Verónica J Huerta1, Fabián Martínez2, Hanna M Ochoa1
1Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada C.P. 22800, Baja California, Mexico.
Materials (Basel, Switzerland)
|January 28, 2026
概括
电子和离子辐射可以在缺乏的酸 (HAp) 中选择性地改变发光. 这种缺陷工程方法为定制HAp提供了新的可能性.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 发光光谱学 光谱学
背景情况:
- 酸 (HAp) 是一种重要的生物材料,其光学特性受到缺陷的影响.
- 了解缺陷-发光关系是优化HAp应用程序的关键.
- 辐射是一种控制地修改HAp属性的潜在方法.
研究的目的:
- 在电子和离子辐射下研究缺乏的酸 (HAp) 的缺陷选择性发光反应.
- 使用光发光 (PL) 和阴极发光 (CL) 技术分析辐射对与缺陷相关的发光的影响.
- 探索辐射作为HAp中缺陷工程的工具.
主要方法:
- 从水热生长的纳米纤维制备压缩的HAp颗粒.
- 光发光 (PL) 和阴极发光 (CL) 光谱在照射之前和之后.
- 低能电子束辐射 (15 keV) 和 Ga+ 离子辐射 (30 keV).
- 单色过渡性CL测量以分析发光衰变动态.
主要成果:
- 电子辐射诱导了两阶段的发光反应:由于空位激活,OH相关波段 (2.57,2.95 eV) 的初始增强,随后是从化中衰变.
- 离子辐射导致单调的发光灭,主要是通过在PO43-组中火氧空缺.
- 与其他缺陷中心相比,衰变常数表明激活的OH通道空缺的回火速度更快.
- 照射证明了在HAp.Ap中对不同发光波段的选择性控制.
结论:
- 辐射作为氧酸中缺陷工程的通用工具,可以选择性修改发光.
- 电子诱导激活和离子驱动抑制为缺陷控制提供了互补的途径.
- 这些发现提供了对空缺稳定性的基本见解,并为定制HAp的光学,传感和生物成像功能提供了开放的途径.
相关概念视频
Ions and Ionic Charges
79.0K
In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called...
79.0K
Formation of Complex Ions
26.0K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
26.0K
Ion Channels
91.4K
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
91.4K
Precipitation of Ions
30.2K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
30.2K
Beams
1.8K
Beams are integral components of structural engineering and construction, designed to support loads applied at various points along their length. These long, straight members can be classified based on geometry, cross-section, support type, and equilibrium condition.
Based on geometry, beams can be straight, tapered, or curved. Straight beams are the most common type and have a constant cross-section throughout their length. Tapered beams, on the other hand, have a varying cross-section along...
Based on geometry, beams can be straight, tapered, or curved. Straight beams are the most common type and have a constant cross-section throughout their length. Tapered beams, on the other hand, have a varying cross-section along...
1.8K
Common Ion Effect
46.4K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
46.4K


