Biomedical Engineering Reference
In-Depth Information
A
(a)
(b)
S. aureus
E. coli
B
(a)
(b)
9 mm
4 mm
S. aureus
E. coli
C
(a)
(b)
S. aureus
E. coli
FIGURE 18.2
Antibacterial.activity.of.(A).Pt-NPs.solution.with.PVP,.(B).Ag-NPs.solution.stabilized.with.PVP,.and.(C).Ag-NPs.
solution.stabilized.with.SDS.against.
S. aureus
.(KCTC.1928).(a).and.
E. coli
.(KCTC.1041).(b)..All.concentrations.of.
Pt-NPs.and.Ag-NPs.are.10.µl.(5.4.ppm)..(Reproduced.with.permission.from.Cho,.K.H.,.et.al.,.
Electrochem. Acta
,.
51,.956,.2005..Copyright.Elsevier.)
size.of.the.particles,.the.amount.of.Ag-NPs.within.the.hydrogel,.and.amount.of.monomer.
acid. in. the. hydrogel-silver. nanocomposites.. Figure 18.3. shows. the. formation. of. Ag-NPs.
within.the.swollen.copolymeric.network.
When.Petica.and.co-workers
13
.investigated.the.antibacterial.and.antifungal.properties.of.
colloidal.silver.solutions.(CSSs),.they.discovered.that.CSSs.showed.good.activities.against.
Staphylococcus aureus
.(ATCC).(Gram-positive.cocci),.
Pseudomonas aeruginosa
.(ATTC),.
E. coli
.
(ATCC),.and
Acinetobacter
spp..(Gram-negative.coccobacillus)..In.another,.similar.investi-
gation.by.Llić.and.co-workers,
14
.it.was.found.that.cotton.fabric.loaded.with.silver.nano-
particles. from. 10. and. 50. ppm. colloids. exhibited. excellent. antimicrobial. activity. against.
Gram-negative.bacterium.
E. coli
,.Gram-positive.bacterium
S. aureus
,.and.fungus.
C. albicans.
.
Thus,.we.can.assume.that.silver.nanoparticles.exhibited.excellent.antibacterial.and.anti-
fungal.activities.
Rai. and. co-workers,
15
. in. an. article. on. Ag-NPs. as. a. new. generation. of. antimicrobi-
als,. described. the. action. mechanism. of. silver,. silver. ion-AgNO
3
,. silver. zeolite,. and.
Ag-NPs..They.also.went.on.to.describe.the.effect.of.size.and.shape.on.the.antimicrobial.
activity. of. nanoparticles,. as. well. as. the. applications. of. silver. nanoparticles.. Sharma.
and. co-workers
16
. reported. in. their. review. that. Ag-NPs. prepared. by. green. synthesis.
interact.with.the.cell.membrane.of.bacteria..Ag.NPs.incorporated.with.surfactants.and.
polymers. had. advantages. in. antibacterial. activities. against. Gram-positive. and. Gram-
negative.bacteria.
