The most common way to reduce humidity interference is to combine hydrophobic sensing elements on hydrophobic substrates. despite the fact that this approach is simple and effective, it limits the options for selecting other sorts of measurement elements. generally, this method requires combining hydrophobic sensing probes on hydrophobic substrates at the expense of losing the opportunity to use hydrophilicity to increase the dimension or power of the sensing. Hydrophilicity can add some other dimension to the colorimetric array to increase its sensing power. for instance, a few colorimetric chemical reactions can be accelerated with water vapor, which cannot only increase the sensitivity but additionally reduce the response time of the sensor. If humidity interference can be remedied with a hydrophilic sensing system, it opens the way for the implementation of hydrophilic instructions in colorimetric gas sensors and the enlargement of applications [356]. The mammalian olfactory system operates in an aquatic environment, which means that the sensing mechanism is compatible with water [352]. a number of the color indicators used for the array of colorimetric sensors are pH indicators, which are usually generated by using hydrophilic film as a color carrier, which is why colorimetric indicators typically work via changing the pH due to the dissolution of the preferred chemicals within the water. but, if the carrier has poor hygrometry or if the ambient humidity is limited, the sensitivity and their performance of this kind of indicator might also decrease. considering moisture affects the sensitivity and effectiveness of color change, highly hydrophilic or water-containing materials such as hydrogels can be very beneficial to be used within the instruction of indicators to enhance the color response of pH-sensitive dyes to the preferred chemical substances. [283]. to investigate the opportunity of minimizing moisture interference in a hydrophilic colorimetric sensing system, a hydrogel has been introduced which could keep up to 90% of water, as a matrix for loading sensing probes and regulating micro-humidity within the chemical reaction assay area. Hydrogels have previously been used as obvious films/substrates in colorimetric sensors to offer a micro-liquid environment for enriching analytes, increasing sensitivity, and mimicking the olfactory mucosa [356].
The most common way to
reduce
humidity interference is to combine hydrophobic
sensing
elements on hydrophobic substrates.
despite
the fact that this approach is simple and effective, it limits the options for selecting other sorts of measurement elements.
generally
, this method requires combining hydrophobic
sensing
probes on hydrophobic substrates at the expense of losing the opportunity to
use
hydrophilicity to increase the dimension or power of the
sensing
. Hydrophilicity can
add
some
other dimension to the colorimetric array to increase its
sensing
power.
for
instance, a few colorimetric
chemical
reactions can
be accelerated
with
water
vapor, which cannot
only
increase the
sensitivity
but
additionally
reduce
the response time of the sensor. If humidity interference can
be remedied
with a hydrophilic
sensing
system, it opens the way for the implementation of hydrophilic instructions in colorimetric gas sensors and the enlargement of applications [356]. The mammalian olfactory system operates in an aquatic environment, which means that the
sensing
mechanism is compatible with
water
[352].
a
number of the
color
indicators
used
for the array of colorimetric sensors are pH
indicators
, which are
usually
generated by using hydrophilic film as a
color
carrier, which is why colorimetric
indicators
typically
work via changing the pH due to the dissolution of the preferred
chemicals
within the
water
.
but
, if the carrier has poor
hygrometry
or if the ambient humidity
is limited
, the
sensitivity
and their performance of this kind of
indicator
might
also
decrease.
considering
moisture affects the
sensitivity
and effectiveness of
color
change
,
highly
hydrophilic or water-containing materials such as hydrogels can be
very
beneficial to be
used
within the instruction of
indicators
to enhance the
color
response of pH-sensitive dyes to the preferred
chemical
substances. [283].
to
investigate the opportunity of minimizing moisture interference in a hydrophilic colorimetric
sensing
system, a hydrogel has
been introduced
which could
keep
up to 90% of
water
, as a matrix for loading
sensing
probes and regulating micro-humidity within the
chemical
reaction assay area. Hydrogels have previously been
used
as obvious films/substrates in colorimetric sensors to offer a micro-liquid environment for enriching analytes, increasing
sensitivity
, and mimicking the olfactory mucosa [356].