TY - JOUR
T1 - Modelling of optical absorption of silver NP's produced by UV radiation embedded in mesostructured silica films
AU - Valverde-Aguilar, Guadalupe
AU - García-Macedo, Jorge A.
AU - Rentería-Tapia, Víctor M.
AU - Gómez, Raúl W.
AU - Quintana-García, Manuel
PY - 2011/10
Y1 - 2011/10
N2 - Hexagonal mesostructured films containing silver ions were obtained by sol-gel method. Brij 58 was used to produce channels into the film, which house these ions. The films were exposure to UV radiation to produced silver metallic nanoparticles. The presence of the metallic nanoparticles was determined by infrared spectroscopy and optical absorption. Besides, these nanoparticles and core-shell structures of silver-silver oxide nanoparticles were identified by high-resolution transmission electronic microscopy. From these measurements, the obtained size range for silver nanoparticles was 6.1 nm. The absorption spectrum located at 440 nm was modelled and well fitted with the Gans theory considering refractive index higher than the one coming from host matrix. This index is explained because the silver oxide shell modifies the local surrounding medium of the metallic nanoparticles.
AB - Hexagonal mesostructured films containing silver ions were obtained by sol-gel method. Brij 58 was used to produce channels into the film, which house these ions. The films were exposure to UV radiation to produced silver metallic nanoparticles. The presence of the metallic nanoparticles was determined by infrared spectroscopy and optical absorption. Besides, these nanoparticles and core-shell structures of silver-silver oxide nanoparticles were identified by high-resolution transmission electronic microscopy. From these measurements, the obtained size range for silver nanoparticles was 6.1 nm. The absorption spectrum located at 440 nm was modelled and well fitted with the Gans theory considering refractive index higher than the one coming from host matrix. This index is explained because the silver oxide shell modifies the local surrounding medium of the metallic nanoparticles.
KW - Block copolymers
KW - Core-shell
KW - Gans theory
KW - Modeling and simulation
KW - Refractive index
KW - Silver nanoparticles
KW - Sol-gel
KW - Thin film
UR - http://www.scopus.com/inward/record.url?scp=80955177556&partnerID=8YFLogxK
U2 - 10.1007/s11051-011-0425-9
DO - 10.1007/s11051-011-0425-9
M3 - Artículo
SN - 1388-0764
VL - 13
SP - 4613
EP - 4622
JO - Journal of Nanoparticle Research
JF - Journal of Nanoparticle Research
IS - 10
ER -