Аннотация
We assessed at multiple length scales (nanometers to millimeters) the
nanocoatings of silver nanoparticles (AgNPs) on model SiO2/Si
substrates. The coatings from biogenic AgNPs (from yeasts Rhodotorula
glutinis and Rhodotorula mucilaginosa) were compared to those formed
from ``synthetic'' AgNPs capped with citrate and sodium dodecyl
sulfate (SDS). With computational analysis of large-field (LF) X-ray
images of the whole substrates (5 x 5 mm), we were able to assess the
coatings homogeneity, relative amount of AgNPs, and their distribution
as agglomerates. Surprisingly, by analyzing more than 100,000 elements
(nanoparticles and agglomerates) in each sample, it was observed that
the mentioned features have little dependence on the AgNPs morphology
and capping agents. All silver nanocoatings resisted when immersed in
phosphate-buffered saline medium by forming agglomerates of up to 10 mu
m(2). However, coatings formed with synthetic AgNPs (capped with citrate
and SDS) led to a higher antimicrobial efficiency against Staphylococcus
aureus.
Пользователи данного ресурса
Пожалуйста,
войдите в систему, чтобы принять участие в дискуссии (добавить собственные рецензию, или комментарий)