基于聚乙烯胺涂层碳点和金纳米粒子的生物成像用于pH传感和金属增强光
Shweta Pawar1, Hamootal Duadi1, Moran Friedman Gohas2,3
1Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Ramat Gan 5290002, Israel.
ACS applied bio materials
|October 23, 2023
概括
聚乙胺涂层碳点 (PEI-CDs) 与黄金纳米颗粒相结合时表现出pH敏感的光和增强的光发光. 这些无毒的PEI-CD显示出有针对性的生物成像应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 生物医学工程 生物医学工程
背景情况:
- 碳点 (CD) 是发射特定波长光的光纳米粒子,在生物成像,光电子和传感中得到应用.
- 聚乙胺 (PEI) 涂层增强了碳点特性,创造了对pH敏感的材料,有可能用于先进的应用.
研究的目的:
- 合成具有较长发射波长的聚乙胺涂层碳点 (PEI-CDs).
- 为了研究PEI-CD的pH敏感光学特性.
- 使用金纳米粒子通过金属增强光增强PEI-CD的光发光.
主要方法:
- 对PEI-CDs的热水合成.
- 光量子收益率和依赖pH的光学特性 (pH2-14) 的表征.
- 采用EDC-NHS化学方法将金纳米粒子与PEI-CD结合起来.
主要成果:
- 合成的PEI-CD显示出强烈的光,量子产量高达20.2%.
- 由于PEI上的氨基基群,PEI-CD在广泛的pH范围 (2-14) 中表现出明显的pH敏感光.
- 与金纳米颗粒的合增强了PEI-CD的光发光度5-6倍,主要是通过增加辐射衰变速率.
结论:
- PEI-CD是有前途的光纳米材料,具有可调节的,pH敏感的光学特性.
- 金属增强的光显著增强PEI-CD的光发光.
- 具有核准潜力的无毒PEI-CD适用于先进的生物成像应用.
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