pH sensor based on boron nitride nanotubes
- 16 September 2009
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 20 (41), 415501
- https://doi.org/10.1088/0957-4484/20/41/415501
Abstract
A submicrometer-sized pH sensor based on biotin-fluorescein-functionalized multiwalled BN nanotubes with anchored Ag nanoparticles is designed. Intrinsic pH-dependent photoluminescence and Raman signals in attached fluorescein molecules enhanced by Ag nanoparticles allow this novel nanohybrid to perform as a practical pH sensor. It is able to work in a submicrometer-sized space. For example, the sensor may determine the environmental pH of sub-units in living cells where a traditional optical fiber sensor fails because of spatial limitations.Keywords
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