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Charge-sensitive fluorescent nanosensors created from nanodiamonds.
V Petrakova1, I Rehor, J Stursa
1Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna sq. 3105, 272 01 Kladno, Czech Republic. vladka.petrakova@gmail.com.
Nanoscale
|July 4, 2015
Summary
Fluorescent nanodiamonds (FNDs) offer direct optical detection of molecular interactions. Their sensing mechanism relies on charge-induced switching of nitrogen-vacancy (NV) centers in response to molecules.
Area of Science:
- Materials Science
- Nanotechnology
- Biophysics
Background:
- Nanosensors are crucial for detecting molecular events.
- Direct optical readout of noncovalent interactions remains challenging.
Purpose of the Study:
- To demonstrate fluorescent nanodiamonds (FNDs) as effective nanosensors.
- To elucidate the mechanism of optical readout for molecular events using FNDs.
Main Methods:
- Utilizing fluorescent nanodiamonds (FNDs) with nitrogen-vacancy (NV) centers.
- Investigating the optical properties of NV centers under varying molecular interactions.
- Correlating changes in NV center charge states with molecular binding events.
Main Results:
- FNDs enable direct optical detection of noncovalent molecular events.
- Sensing mechanism involves charge-dependent switching of NV center states.
- NV center state changes are induced by the interaction of FND surfaces with charged molecules.
Conclusions:
- FNDs represent a novel class of nanosensors for molecular event detection.
- The optical readout mechanism offers a sensitive and direct method for analyzing molecular interactions.
