30
M. A. Espinosa-Hernandez et al.
Table 2.1
(continued)
BioMEMS platform
Main components
Fabrication strategy Mechanisms of
operation
Detected analyte
Specifics
References
Microfluidic
colorimetric biosensor
• 8 microchannels
• CuFe
2 O
4 /GQDs
MNPs
• Microfluidic chip
The microfluidic
chip was made by
traditional soft
lithography
technique. The
colorimetric assay
was conducted with
peroxidase-like
CuFe
2 O
4 /GQDs
MNPs
Analytes of different
concentrations were
injected into the
microchannel from
two entrances
simultaneously, and
converged at the
intersection point. ACh
and NaH
2 PO
4 buffer
solutions were injected
to other two entrances
and were directed to
the color area
• Chlorpyrifos
inhibitors
The GQDs MNPs
were added to
enhance the
colorimetric result.
The device was
compact and
precise using small
sample volume,
lowering the limit
of detection
Mao et al.
(2017)
(continued)