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Nanosensors
book

Nanosensors

by Vinod Kumar Khanna
April 2016
Intermediate to advanced content levelIntermediate to advanced
666 pages
22h 57m
English
CRC Press
Content preview from Nanosensors
125Materials for Nanosensors
to a surrounding array of molecules or anions [ligands, complexing agents])
with millisecond lifetimes. Fluorescence from single QDs has been observed
longer than from most other individual uorophores enabling to collect a
larger number of photons. Further, the synthetic protocol of QDs with dif-
ferent emission wavelengths is simpler and reaction time is the dot size-
controlling variable.
What are the disadvantages of quantum dots? Disadvantages of QDs include
the toxicity of the component heavy metals Cd or Pb used in II–VI semicon-
ductor dots, the most widely used QDs. Furthermore, the inorganic nature
of QDs renders them inherently insoluble in aqueous media. Also, the larger
hydrodynamic radii (the effe
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Publisher Resources

ISBN: 9781439827130