Journal
NANOTECHNOLOGY
Volume 20, Issue 41, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/20/41/415501
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Funding
- National Institute for Materials Science (NIMS)
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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.
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