
56 Biosensors Based on Nanomaterials and Nanodevices
A = α bC
where
A is the absorbance at 280
b is the path length
C is the nM concentration of Ab.
5. Calculate the concentration of Ab on the QD-Ab as follows:
C of Ab on QDAb
~=
6. Calculate the number of Ab per QD as follows:
Nanomole Ab perQD
1 nmolQD
=
3.4 Bioimaging Applications
The size-dependent optical and electrochemical properties of QDs offer various signal
transduction modes, including simultaneous approaches (optical and electrochemical) that
are not available with other materials.
4,5,11,12,115,126,129–131
The range of potential applications ...