聚合物微球与深红色光分子共聚化,作为侧流免疫染色学标签
Jiaxing Han1, Qingyu Lv2, Daoxiang Su1
1School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China.
Langmuir : the ACS journal of surfaces and colloids
|March 22, 2024
概括
研究人员开发了新的光微球,以改善侧流免疫染色学 (LFIA) 中的生物传感. 这些微球克服了来自酸纤维素膜的背景噪声,提高了对生物标的检测灵敏度,如SARS-CoV-2 N蛋白.
科学领域:
- 材料科学 材料科学 材料科学
- 生物技术是生物技术.
- 分析化学 分析化学
背景情况:
- 侧流免疫染色学 (LFIA) 中的纤维素膜可以引起背景光,限制检测灵敏度.
- 光微球对于LFIA至关重要,但需要策略来减轻干扰.
- 开发新的光标签是推动敏感和准确的生物检测的关键.
研究的目的:
- 合成基于罗达胺的新型染料分子 (RB2),具有扩展的π结合和不对称结构.
- 通过无肥乳液聚合制造使用RB2制造卡基组功能化的光微球.
- 在LFIA中评估这些微球作为光标签的性能,用于敏感的生物检测.
主要方法:
- 合成RB2染料分子,增强光发光量产 (PLQY).
- 两步无肥乳液聚合,以制备具有卡尔基功能的光微球.
- 使用SEM,TEM,DLS,FTIR,UV-Vis和光光谱相光学进行表征.
- 在SARS-CoV-2 N蛋白检测的侧流免疫试验中应用微球.
主要成果:
- 在乙醇中,RB2染料实现了30.01%的绝对PLQY.
- 成功合成了具有高红色光强度 (λabs ∼ 610 nm, λem ∼ 660 nm) 的稳定,分散良好的光微球.
- 证明了RB2在微球中成功的共聚合.
- 在LFIA中实现了SARS-CoV-2 N蛋白的2.5 pg/mL的低检测极限,线性从2.5 pg/mL到10 ng/mL.
结论:
- 开发的基于RB2的光微球有效地作为LFIA中的标签发挥作用.
- 这些微球克服了背景光干扰,显著提高了检测灵敏度.
- 这些发现支持使用这些新型光微球用于先进的生物检测应用.
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