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量子点数字免疫测试在可回收的高折射率珠数组上进行,该数组用低数值孔径目标成像
Xiaoxiao Yang1, Shuangshuang Ma1, Xiaoyan Pan2
1School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China.
Analytical chemistry
|February 20, 2026
概括
一种新型的高折射率珠数组 (h-RIBA) 基质使得使用标准空气目标在数字免疫测试 (DIAs) 中实现单分子成像. 这种具有成本效益的方法简化了高通量诊断和仪器小型化.
科学领域:
- 生物医学工程 生物医学工程
- 材料科学 材料科学 材料科学
- 分析化学 分析化学
背景情况:
- 数字免疫测试 (DIA) 传统上需要高放大油对象进行成像,阻碍自动化和小型化.
- 现有的方法限制了吞吐量,增加了仪器复杂性和DIA的成本.
研究的目的:
- 为DIAs开发一个具有成本效益的基板,使单分子成像能够使用标准的空气目标.
- 为了克服当前DIA成像技术在高通量应用中的局限性.
主要方法:
- 使用嵌入在PDMS膜中的自组装的酸玻璃微球 (BTGMs) 制造高折射率珠数组 (h-RIBA) 基板.
- 使用h-RIBA基质与20×/0.4 NA空气目标用于在单个分子水平上成像单个量子点 (QD).
- 执行基于磁珠的DIAs用于癌胚抗原 (CEA) 检测.
主要成果:
- 该h-RIBA基质促进了清晰的单分子成像与低NA空气目标.
- 成功检测了CEA,线性范围为0-1.5 pM,检测极限 (LOD) 为88 fM.
- 临床验证显示,血中CEA测量与医院值一致.
结论:
- h-RIBA基板为DIA成像提供了一个低成本,用户友好的解决方案,与各种纳米粒子和光体兼容.
- 这种方法简化了仪器仪表,并使自动化单分子光成像成为可能.
- h-RIBA基质加速了用于临床诊断的DIA技术的翻译和商业化.
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