Borisov Sergey M, Mayr Torsten, Mistlberger Günter, Waich Kerstin, Koren Klaus, Chojnacki Pavel, Klimant Ingo
Institute of Analytical Chemistry and Food Chemistry, Graz University of Technology, Graz, Austria.
Talanta. 2009 Oct 15;79(5):1322-30. doi: 10.1016/j.talanta.2009.05.041. Epub 2009 Jun 6.
Optical nanosensors for such important analytes as oxygen, pH, temperature, etc. are manufactured in a simple way via precipitation. Lipophilic indicators are entrapped into nanobeads based on poly(methyl methacrylate), polystyrene, polyurethanes, ethylcellulose, and other polymers. Charged groups greatly facilitate formation of the small beads and increase their stability. Sensing properties of the beads can be tuned by choosing the appropriate indicator. Nanosensors for carbon dioxide and ammonia are found to be cross-sensitive to pH if dispersed in aqueous media. These nanobeads are successfully employed to design bulk optodes. Nanochemosensors with enhanced brightness via light-harvesting and multi-functional magnetic nanosensors also are prepared.
用于诸如氧气、pH值、温度等重要分析物的光学纳米传感器通过沉淀法以简单的方式制造。亲脂性指示剂被包裹在基于聚甲基丙烯酸甲酯、聚苯乙烯、聚氨酯、乙基纤维素和其他聚合物的纳米珠中。带电基团极大地促进了小珠子的形成并提高了它们的稳定性。通过选择合适的指示剂可以调节珠子的传感特性。如果分散在水性介质中，发现用于二氧化碳和氨的纳米传感器对pH值具有交叉敏感性。这些纳米珠已成功用于设计整体光极。还制备了通过光捕获具有增强亮度的纳米化学传感器和多功能磁性纳米传感器。
