With the rise of nanomaterials, colorimetric sensor arrays face new opportunities and challenges. A promising manner to further improve the properties of arrays for bioassay applications is to activate sensitive receptors with particular nanomaterials, including optical NPs such as quantum dots (QDs), UCNPs, metal nanoparticles (MNp) / nanoclusters (NCs), Silica NPs (SiO₂) and metal-organic frameworks (MOFs), gold nanoparticles (GNPs), organically modified silicates (ormosils, e. g. , silica gel), molybdenum disulfide (MoS₂ QDs), dyes due to aggregation, small dyes molecular fluorophores, semiconductor oligomer/polymer nanoparticles, and graphene oxide (GO) nanoparticles. one of these nanomaterials is metal nanoparticles, which the small size of MNPs offers them unique properties that make MNPs very appropriate to be used in chemical and biological measurement applications. for instance, due to the small size of MNPs, which can be corresponding to the wavelength of visible light, free electrons on the surface of particles display a collective oscillation known as "localized surface plasmon resonance" (LSPR). metal nanoparticles supply them molar extinction coefficients several times larger than conventional organic dyes. further, the robust adsorption generated via LSPR particles could be very sensitive to changes in particle surroundings such as particle aggregation. these properties are very beneficial for assays applications and act as the basis of most MNP colorimetric sensors.
With the rise of nanomaterials, colorimetric sensor arrays face new opportunities and challenges. A promising manner to
further
improve
the properties of arrays for
bioassay
applications is to activate sensitive receptors with particular nanomaterials, including optical
NPs
such as quantum dots (
QDs
),
UCNPs
, metal nanoparticles (
MNp
) /
nanoclusters
(
NCs
), Silica
NPs
(SiO₂) and metal-organic frameworks (
MOFs
), gold nanoparticles (
GNPs
),
organically
modified silicates (
ormosils
,
e. g.
,
silica gel), molybdenum
disulfide
(MoS₂
QDs
), dyes due to aggregation,
small
dyes molecular
fluorophores
, semiconductor
oligomer
/polymer nanoparticles, and graphene oxide (GO) nanoparticles.
one
of these nanomaterials is metal nanoparticles, which the
small
size of
MNPs
offers them unique properties that
make
MNPs
very
appropriate to be
used
in chemical and biological measurement applications.
for
instance, due to the
small
size of
MNPs
, which can be corresponding to the wavelength of visible light, free electrons on the surface of
particles
display a collective oscillation known as
"
localized surface plasmon resonance
"
(
LSPR
).
metal
nanoparticles supply them molar extinction coefficients several times larger than conventional organic dyes.
further
, the robust adsorption generated via
LSPR
particles
could be
very
sensitive to
changes
in
particle
surroundings such as
particle
aggregation.
these
properties are
very
beneficial for assays applications and act as the basis of most MNP colorimetric sensors.