International Journal of Nanomedicine,
Год журнала:
2015,
Номер
unknown, С. 6257 - 6257
Опубликована: Окт. 1, 2015
Background:
Graphene
and
graphene-based
nanocomposites
are
used
in
various
research
areas
including
sensing,
energy
storage,
catalysis.
The
mechanical,
thermal,
electrical,
biological
properties
render
of
metallic
nanoparticles
useful
for
several
biomedical
applications.
Epithelial
ovarian
carcinoma
is
the
fifth
most
deadly
cancer
women;
tumors
initially
respond
to
chemotherapy,
but
eventually
acquire
chemoresistance.
Consequently,
development
novel
molecules
therapy
essential.
This
study
was
designed
develop
a
simple,
non-toxic,
environmentally
friendly
method
synthesis
reduced
graphene
oxide–silver
(rGO–Ag)
nanoparticle
using
Tilia
amurensis
plant
extracts
as
reducing
stabilizing
agents.
anticancer
rGO–Ag
were
evaluated
cells.
Methods:
synthesized
nanocomposite
characterized
analytical
techniques.
series
assays
such
cell
viability,
lactate
dehydrogenase
leakage,
reactive
oxygen
species
generation,
cellular
levels
malonaldehyde
glutathione,
caspase-3
activity,
DNA
fragmentation
cells
(A2780).
Results:
AgNPs
with
an
average
size
20
nm
uniformly
dispersed
on
sheets.
data
obtained
from
biochemical
indicate
that
significantly
inhibited
viability
A2780
increased
compared
other
tested
nanomaterials
oxide,
rGO,
AgNPs.
Conclusion:
T.
extract-mediated
could
facilitate
large-scale
production
nanocomposites;
showed
significant
inhibiting
effect
silver
nanoparticles.
be
effective
non-toxic
therapeutic
agents
treatment
both
stem
Keywords:
graphene–silver
nanocomposites,
nanoparticles,
cells,
Chemical Society Reviews,
Год журнала:
2013,
Номер
43(1), С. 291 - 312
Опубликована: Окт. 11, 2013
The
chemical
reduction
of
graphene
oxide
is
a
promising
route
towards
the
large
scale
production
for
commercial
applications.
current
state-of-the-art
in
reduction,
consisting
more
than
50
types
reducing
agent,
will
be
reviewed
from
synthetic
chemistry
point
view.
Emphasis
placed
on
techniques,
reaction
mechanisms
and
quality
produced
graphene.
agents
are
under
two
major
categories:
(i)
those
which
function
according
to
well-supported
(ii)
proposed
based
knowledge
organic
chemistry.
This
review
serve
as
valuable
platform
understand
efficiency
these
oxide.
The Journal of Physical Chemistry C,
Год журнала:
2011,
Номер
115(34), С. 17009 - 17019
Опубликована: Июль 20, 2011
Despite
the
recent
developments
in
Graphene
Oxide
due
to
its
importance
as
a
host
precursor
of
Graphene,
detailed
electronic
structure
and
evolution
during
thermal
reduction
remain
largely
unknown,
hindering
potential
applications.
We
show
that
combination
high
resolution
situ
X-ray
photoemission
absorption
spectroscopies
offer
powerful
approach
monitor
deoxygenation
process
comprehensively
evaluate
thin
films
at
different
stages
process.
It
is
established
edge
plane
carboxyl
groups
are
highly
unstable,
whereas
carbonyl
more
difficult
remove.
The
results
consistently
support
formation
phenol
through
reaction
basal
epoxide
with
adjacent
hydroxyl
moderate
degrees
activation
(~400
{\deg}C).
predominant
over
survive
even
temperature
1000
{\deg}C.
For
first
time
drastic
increase
density
states
(DOS)
near
Fermi
level
600
{\deg}C
observed,
suggesting
progressive
restoration
aromatic
thermally
reduced
graphene
oxide
Small,
Год журнала:
2016,
Номер
12(48), С. 6640 - 6696
Опубликована: Ноя. 2, 2016
In
recent
years,
heterogeneous
photocatalysis
has
received
much
research
interest
because
of
its
powerful
potential
applications
in
tackling
many
important
energy
and
environmental
challenges
at
a
global
level
an
economically
sustainable
manner.
Due
to
their
unique
optical,
electrical,
physicochemical
properties,
various
2D
graphene
nanosheets-supported
semiconductor
composite
photocatalysts
have
been
widely
constructed
applied
different
photocatalytic
fields.
this
review,
fundamental
mechanisms
photocatalysis,
including
thermodynamic
kinetics
requirements,
are
first
systematically
summarized.
Then,
the
photocatalysis-related
properties
derivatives,
design
rules
synthesis
methods
graphene-based
composites
highlighted.
Importantly,
strategies,
doping
sensitization
semiconductors
by
graphene,
improving
electrical
conductivity
increasing
eloectrocatalytic
active
sites
on
strengthening
interface
coupling
between
fabricating
micro/nano
architectures,
constructing
multi-junction
nanocomposites,
enhancing
photostability
semiconductors,
utilizing
synergistic
effect
modification
thoroughly
The
pollutant
degradation,
H2
production,
CO2
reduction
also
addressed.
Through
reviewing
significant
advances
topic,
it
may
provide
new
opportunities
for
designing
highly
efficient
other
fields,
such
as
solar
cells,
thermal
catalysis,
separation,
purification.
Journal of Materials Chemistry A,
Год журнала:
2015,
Номер
3(37), С. 18753 - 18808
Опубликована: Янв. 1, 2015
The
development
of
graphene
based
metal
and
oxide
nano
composites
is
reviewed
with
special
focus
on
their
synthesis
applications
in
electronics,
batteries,
solar
cells
analytics.
Molecules,
Год журнала:
2015,
Номер
20(10), С. 18886 - 18906
Опубликована: Окт. 16, 2015
Melatonin
is
a
tryptophan-derived
molecule
with
pleiotropic
activities.
It
present
in
almost
all
or
organisms.
Its
synthetic
pathway
depends
on
the
species
which
it
measured.
For
example,
tryptophan
to
melatonin
differs
plants
and
animals.
speculated
that
machinery
eukaryotes
was
inherited
from
bacteria
as
result
of
endosymbiosis.
However,
melatonin's
mechanisms
microorganisms
are
currently
unknown.
metabolism
highly
complex
these
enzymatic
processes
having
evolved
cytochrome
C.
In
addition
its
degradation,
metabolized
via
pseudoenzymatic
free
radical
interactive
processes.
The
metabolic
products
overlap
often
difficult
determine
process
dominant.
under
oxidative
stress,
may
be
featured
over
others.
Because
complexity
degradative
processes,
expected
additional
novel
metabolites
will
identified
future
investigations.
original
primary
function
early
life
forms
such
unicellular
organisms
scavenger
antioxidant.
During
evolution,
selected
signaling
transduce
environmental
photoperiodic
information
into
an
endocrine
message
multicellular
for
other
purposes
well.
As
antioxidant,
exhibits
several
unique
features
differ
classic
antioxidants.
These
include
cascade
reaction
radicals
capacity
induced
moderate
stress.
make
potent
endogenously-occurring
antioxidant
protects
catastrophic
