Analytical Sciences,
Journal Year:
2023,
Volume and Issue:
40(1), P. 123 - 132
Published: Oct. 11, 2023
The
comparative
evaluation
of
two
aerosol
droplets
different
chemical
compositions
using
the
dual-beam
laser
trapping
technique
can
be
employed
for
highly
sensitive
and
accurate
measurements
water
activities
such
droplets.
However,
it
is
technically
difficult
to
load
into
adjacent
optical
traps
that
are
only
a
few
tens
micrometers
apart.
To
overcome
this
challenge,
chamber
with
an
overhanging
roof
was
created.
This
prevented
initially
trapped
from
being
contaminated
by
were
subsequently
introduced
chamber.
Herein,
we
report
simultaneous
aqueous
ammonium
sulfate
(AS)
droplet
succinic
acid
(SA)
in
air
technique.
Two
successfully
fused
through
manipulation
form
mixed
inorganic/organic
air.
experimental
approach
advantageous
because
forms
under
constant
relative
humidity
(RH)
conditions.
previous
studies,
necessary
compensate
changes
RH
prior
after
fusion.
assess
validity
theoretical
predictions
activity
containing
AS
SA,
equilibrium
radii
compared
those
calculated
certain
models.
npj Climate and Atmospheric Science,
Journal Year:
2024,
Volume and Issue:
7(1)
Published: Aug. 30, 2024
Abstract
Aerosol
hygroscopic
behavior
plays
a
central
role
in
determining
climate
effects
and
environmental
influence
of
atmospheric
particulates.
Water-soluble
organic
acids
(WSOAs)
constitute
significant
fraction
aerosols.
These
have
complex
impact
on
aerosol
hygroscopicity
due
to
their
physical
chemical
interactions
with
inorganic
salts.
The
mixing
WSOAs
salts
exerts
multiple
the
growth
phase
behaviors
particles,
largely
depending
composition
ratio,
acid
properties,
particle
size
between
components.
play
critical
water
uptake
characteristics
especially
low
moderate
RH
ranges.
previous
studies
reveal
occurrence
chemistry
related
chloride/nitrate/ammonium
depletions
droplets
containing
potential
recycling
HCl/HNO
3
/NH
depletion
may
contribute
budget
reactive
gases.
A
fundamental
understanding
for
inorganic–WSOA
systems
is
essential
accurate
parameterization
models.
However,
there
still
lack
comprehensive
internally
mixed
systems.
present
review
comprehensively
summarizes
impacts
changes
atmospherically
relevant
particles
under
subsaturated
conditions,
overviews
recent
advances
process
Journal of Aerosol Science,
Journal Year:
2023,
Volume and Issue:
174, P. 106255 - 106255
Published: Aug. 28, 2023
Single
particle
levitation
methods
are
a
powerful
subset
of
aerosol
instrumentation
that
allow
wide
range
properties
and
processes
to
be
explored.
One
the
most
common
forms
single
uses
electric
fields
is
generally
referred
as
an
electrodynamic
balance
(EDB).
There
many
different
kinds
EDB's
have
been
designed
with
applications
in
mind,
corresponding
array
analytical
tools
developed
characterize
particles
held
these
traps.
In
this
tutorial,
we
review
design
development
EDB
discuss
methods,
including
electrostatic
analysis,
light
scattering,
spectroscopy,
imaging,
for
measurements
hygroscopic
growth,
volatility,
surface
tension
viscosity,
diffusion,
phase
morphology.
We
go
on
recent
advanced
using
mass
spectrometry
probe
composition.
This
intended
provide
readers
basic
knowledge
set
up
platform,
measurement
protocols
based
available
tools,
run
experiments
fundamental
relevant
their
role
atmosphere,
impacts
clouds
climate,
effects
air
quality,
health
disease,
industrial
processes.
Molecules,
Journal Year:
2022,
Volume and Issue:
27(18), P. 5966 - 5966
Published: Sept. 14, 2022
Characterization,
identification,
and
detection
of
aerosol
particles
in
their
native
atmospheric
states
remain
a
challenge.
Recently,
optical
trapping-Raman
spectroscopy
(OT-RS)
has
been
developed
demonstrated
for
characterization
single,
airborne
particles.
Such
different
chemical
groups
have
characterized
by
OT-RS
recent
years
many
more
are
being
studied.
In
this
work,
we
collected
single-particle
Raman
spectra
measured
using
the
technique
began
construction
library
fingerprints
that
may
be
used
as
reference
potential
identification
atmosphere.
We
from
eight
categories
including
carbons,
bioaerosols
(pollens,
fungi,
vitamins,
spores),
dusts,
biological
warfare
agent
surrogates,
etc.
Among
categories,
spectral
six
published
previously
two
other
new.
also
discussed
challenges,
limitations,
advantages
aerosol-particle
characterization,
detection.
