| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 741083 | Sensors and Actuators B: Chemical | 2009 | 7 Pages |
Abstract
Nanosensors for pH are prepared by staining poly(styrene-block-vinylpyrrolidone) nanobeads with lipophilic pH indicators based on fluoresceins and 1-hydroxypyrene-3,6,8-trisulfonate. Fine tuning of the pH-sensing properties is achieved by varying substituents on the pH indicator. Fluoresceins based on octadecylester- and 5(6)-N-alkyl-carboxamido derivatives show significantly different sensing properties due to lactonization occurring in the latter. The nanobeads show pKa values varying from 5.6 to 7.7, possess low cross-sensitivity to the ionic strength, and are potentially suitable for application in biology, biotechnology, marine science, and other fields.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Sergey M. Borisov, Danielle L. Herrod, Ingo Klimant,