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An antibacterial coating based on a polymer/sol-gel hybrid matrix loaded with silver nanoparticles.

Rivero PJ, Urrutia A, Goicoechea J, Zamarreño CR, Arregui FJ, Matías IR - Nanoscale Res Lett (2011)

Bottom Line: Energy dispersive X-ray (EDX) was also used to confirm the presence of the resulting silver nanoparticles within the thin films.Finally the coatings have been tested in bacterial cultures of genus Lactobacillus plantarum to observe their antibacterial properties.It has been experimentally demonstrated that these silver loaded organic-inorganic hybrid films have a very good antimicrobial behavior against this type of bacteria.

View Article: PubMed Central - HTML - PubMed

Affiliation: Nanostructured Optical Devices Laboratory, Electric and Electronic Engineering Department, Public University of Navarra, Edif, Los Tejos, Campus Arrosadía, 31006, Pamplona, Spain. pedrojose.rivero@unavarra.es.

ABSTRACT
In this work a novel antibacterial surface composed of an organic-inorganic hybrid matrix of tetraorthosilicate and a polyelectrolyte is presented. A precursor solution of tetraethoxysilane (TEOS) and poly(acrylic acid sodium salt) (PAA) was prepared and subsequently thin films were fabricated by the dip-coating technique using glass slides as substrates. This hybrid matrix coating is further loaded with silver nanoparticles using an in situ synthesis route. The morphology and composition of the coatings have been studied using UV-VIS spectroscopy and atomic force microscopy (AFM). Energy dispersive X-ray (EDX) was also used to confirm the presence of the resulting silver nanoparticles within the thin films. Finally the coatings have been tested in bacterial cultures of genus Lactobacillus plantarum to observe their antibacterial properties. It has been experimentally demonstrated that these silver loaded organic-inorganic hybrid films have a very good antimicrobial behavior against this type of bacteria.

No MeSH data available.


Related in: MedlinePlus

EDX image. EDX image of the coating with 4 dip/reduction cycles (PAA 20 mM).
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Figure 3: EDX image. EDX image of the coating with 4 dip/reduction cycles (PAA 20 mM).

Mentions: Such narrow absorption bands are due to the SPR phenomenon of the silver nanoparticles synthesized inside the coating. Furthermore, in order to get an additional evidence of the presence of silver within the hybrid coatings an elemental analysis was obtained using the EDX technique (Figure 3). This EDX spectrum shows a peak at 3 keV that confirms the presence of silver within the coating. The rest of the lines of the EDX spectrum correspond to other elements present in the coating (mainly Si, O, and Na) and also present in the glass slide substrate, as far as the coatings were very thin (150 nm approx.). The EDX analysis together with the SPR absorption bands of the UV-VIS spectra make possible to confirm the reduction of silver ions to elemental silver to form nanoparticles inside the organic/inorganic hybrid coating.


An antibacterial coating based on a polymer/sol-gel hybrid matrix loaded with silver nanoparticles.

Rivero PJ, Urrutia A, Goicoechea J, Zamarreño CR, Arregui FJ, Matías IR - Nanoscale Res Lett (2011)

EDX image. EDX image of the coating with 4 dip/reduction cycles (PAA 20 mM).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211391&req=5

Figure 3: EDX image. EDX image of the coating with 4 dip/reduction cycles (PAA 20 mM).
Mentions: Such narrow absorption bands are due to the SPR phenomenon of the silver nanoparticles synthesized inside the coating. Furthermore, in order to get an additional evidence of the presence of silver within the hybrid coatings an elemental analysis was obtained using the EDX technique (Figure 3). This EDX spectrum shows a peak at 3 keV that confirms the presence of silver within the coating. The rest of the lines of the EDX spectrum correspond to other elements present in the coating (mainly Si, O, and Na) and also present in the glass slide substrate, as far as the coatings were very thin (150 nm approx.). The EDX analysis together with the SPR absorption bands of the UV-VIS spectra make possible to confirm the reduction of silver ions to elemental silver to form nanoparticles inside the organic/inorganic hybrid coating.

Bottom Line: Energy dispersive X-ray (EDX) was also used to confirm the presence of the resulting silver nanoparticles within the thin films.Finally the coatings have been tested in bacterial cultures of genus Lactobacillus plantarum to observe their antibacterial properties.It has been experimentally demonstrated that these silver loaded organic-inorganic hybrid films have a very good antimicrobial behavior against this type of bacteria.

View Article: PubMed Central - HTML - PubMed

Affiliation: Nanostructured Optical Devices Laboratory, Electric and Electronic Engineering Department, Public University of Navarra, Edif, Los Tejos, Campus Arrosadía, 31006, Pamplona, Spain. pedrojose.rivero@unavarra.es.

ABSTRACT
In this work a novel antibacterial surface composed of an organic-inorganic hybrid matrix of tetraorthosilicate and a polyelectrolyte is presented. A precursor solution of tetraethoxysilane (TEOS) and poly(acrylic acid sodium salt) (PAA) was prepared and subsequently thin films were fabricated by the dip-coating technique using glass slides as substrates. This hybrid matrix coating is further loaded with silver nanoparticles using an in situ synthesis route. The morphology and composition of the coatings have been studied using UV-VIS spectroscopy and atomic force microscopy (AFM). Energy dispersive X-ray (EDX) was also used to confirm the presence of the resulting silver nanoparticles within the thin films. Finally the coatings have been tested in bacterial cultures of genus Lactobacillus plantarum to observe their antibacterial properties. It has been experimentally demonstrated that these silver loaded organic-inorganic hybrid films have a very good antimicrobial behavior against this type of bacteria.

No MeSH data available.


Related in: MedlinePlus