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Photoluminescence: Applications

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...

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An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation

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使用上转化纳米粒子进行比度pH感测的宿主-客户方法.

Ivo Rosenbusch¹, Marylyn Setsuko Arai², Fabio Rizzo^1,3

¹Center for Soft Nanoscience and Organic Chemistry Institute, University of Münster Busso-Peus-Str. 10 48149 Münster Germany b.j.ravoo@uni-muenster.de fabio.rizzo@unimi.it.

Nanoscale advances

|May 29, 2025

概括

这项研究引入了一种新的纳米平台,用于使用联合化升级转换纳米粒子 (UCNPs) 的比度pH传感. 该传感器提供了一种稳定且可重复使用的方法来检测溶液中的pH值变化.

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科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
分析化学分析化学

背景情况:

上转化纳米粒子 (UCNPs) 为传感应用提供独特的光学特性.
响应pH的染料对于开发精确和选择性的生物传感器至关重要.
主机-客户互动可以用来创建稳定和功能化的纳米材料.

研究的目的:

开发一种稳定,可在水中分散的比度pH传感器.
为了利用Tm3+/Yb3+联合剂的UCNP与β-cyclodextrin (β-CD) 和对pH响应的染料 (NBD-Ad) 功能化.
为了利用内部波器效应 (IFE) 进行pH依赖的信号调制.

主要方法:

制造Tm3+/Yb3+联合合的UCNP.
通过β-cyclodextrin (β-CD) 实现UCNP的功能化.
亚达曼坦 (Ad) 与一个对pH值有反应的尼特罗本佐沙迪亚染料 (NBD-Ad) 的结合.
利用β-CD和Ad之间的主机-客户互动来进行传感器组装.
基于紫外线/蓝色辐射火和稳定的红色辐射的比度检测.

主要成果:

纳米平台在pH值范围为8.0-11.0.0的范围内显示出一个比度反应 (蓝色/红色发射).
观察到高可重现性和选择性,即使与干扰剂.
传感器表现出极好的可重复使用性.
内部波器效应 (IFE) 已被证实为pH依赖火的机制.

结论:

开发的纳米平台是比度pH感应的一个有前途的工具.
传感器设计提供了稳定性,可重复使用性和高灵敏度.
这种方法为先进的光学传感技术提供了基础.