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在Co2+化ZGGO持久发光纳米粒子中,基于晶格位点占用的光学特性

Yaqi Zhu^1,2, Jian Yang³, Hancheng Zhu⁴

¹State Key Laboratory of Pathogenesis, Prevention and Treatment of High Incidence Diseases in Central Asia, College of Medical Engineering and Technology, Xinjiang Medical University, Urumqi, 830017, China. zhuyq@xjmu.edu.cn.

Scientific reports

|November 12, 2025

概括

接近红外持续发光的纳米粒子是使用加的加洛格尔曼酸盐 (ZGGO:xCo2+) 合成的. 这些纳米粒子表现出源于八面体位点中的离子的发光,缺陷作为扩展发射的关键电荷陷.

科学领域:

材料科学材料科学材料科学
固态化学固态化学
纳米技术纳米技术

背景情况:

持久发光 (PL) 材料储存能量,并在激发后发光,在照明和生物成像中找到应用.
(Co2+) 合材料因其独特的光学特性而受到探索,包括近红外 (NIR) 辐射.
了解兴奋剂机制和缺陷作用对于优化PL性能至关重要.

研究的目的:

为了合成和表征近红外持久发光纳米粒子的CO2+合Zn2(1-x) Co2xGa3Ge0.75O8 (ZGGO:xCo2+).
为了研究二氧化碳+度对粒子大小和发光特性的影响.
阐明ZGGO:xCo2+的NIR PL中的发光机制和缺陷的作用.

主要方法:

使用热水合成制备ZGGO:xCo2+纳米粒子,其度不同.
用动态光散射等技术分析粒子大小.
测量了光学特性,包括持久发光光谱和衰变时间. 密度函数理论 (DFT) 的计算用于确定形成能量和晶体场参数.

主要成果:

合成的ZGGO:xCo2+纳米粒子的平均大小在65.9至52.3纳米之间.
观察到强烈的NIR发射在685nm达到峰值,归因于八面体和四面体位点中的CO2+离子.
达到超过2分钟的持续发光,主要来自八面体CO2+位点,与Ga相关的缺陷被确定为电荷陷.

结论:

在ZGGO中使用CO2+兴奋剂导致可调节的纳米粒子大小和强大的NIR持久发光.
发光源来自于CO2+在不同格子位点的明显过渡,PL的八面体位点占主导地位.
像Ga-on-Zn抗体这样的缺陷在捕获电荷和使长期持续的NIR持久发光中发挥着至关重要的作用.

关键词:

碳二氧化+离子水晶格子的位置.纳米颗粒纳米颗粒持久的发光效应持续的发光效应

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