TY - JOUR
T1 - Exploring the optical and morphological properties of ag and Ag/TiO2nanocomposites grown by supersonic cluster beam deposition
AU - Cavaliere, Emanuele
AU - Benetti, Giulio
AU - Van Bael, Margriet
AU - Winckelmans, Naomi
AU - Bals, Sara
AU - Gavioli, Luca
PY - 2017
Y1 - 2017
N2 - Nanocomposite systems and nanoparticle (NP) films are crucial for many applications and research fields. The structure-properties correlation raises complex questions due to the collective structure of these systems, often granular and porous, a crucial factor impacting their effectiveness and performance. In this framework, we investigate the optical and morphological properties of Ag nanoparticles (NPs) films and of Ag NPs/TiO2porous matrix films, one-step grown by supersonic cluster beam deposition. Morphology and structure of the Ag NPs film and of the Ag/TiO2(Ag/Ti 50-50) nanocomposite are related to the optical properties of the film employing spectroscopic ellipsometry (SE). We employ a simple Bruggeman effective medium approximation model, corrected by finite size effects of the nano-objects in the film structure to gather information on the structure and morphology of the nanocomposites, in particular porosity and average NPs size for the Ag/TiO2NP film. Our results suggest that SE is a simple, quick and effective method to measure porosity of nanoscale films and systems, where standard methods for measuring pore sizes might not be applicable.
AB - Nanocomposite systems and nanoparticle (NP) films are crucial for many applications and research fields. The structure-properties correlation raises complex questions due to the collective structure of these systems, often granular and porous, a crucial factor impacting their effectiveness and performance. In this framework, we investigate the optical and morphological properties of Ag nanoparticles (NPs) films and of Ag NPs/TiO2porous matrix films, one-step grown by supersonic cluster beam deposition. Morphology and structure of the Ag NPs film and of the Ag/TiO2(Ag/Ti 50-50) nanocomposite are related to the optical properties of the film employing spectroscopic ellipsometry (SE). We employ a simple Bruggeman effective medium approximation model, corrected by finite size effects of the nano-objects in the film structure to gather information on the structure and morphology of the nanocomposites, in particular porosity and average NPs size for the Ag/TiO2NP film. Our results suggest that SE is a simple, quick and effective method to measure porosity of nanoscale films and systems, where standard methods for measuring pore sizes might not be applicable.
KW - AFM
KW - Chemical Engineering (all)
KW - HAADF-STEM
KW - Materials Science (all)
KW - Metal and metal/oxide nanoparticles
KW - Porosity
KW - Spectroscopic ellipsometry
KW - Supersonic cluster beam deposition
KW - AFM
KW - Chemical Engineering (all)
KW - HAADF-STEM
KW - Materials Science (all)
KW - Metal and metal/oxide nanoparticles
KW - Porosity
KW - Spectroscopic ellipsometry
KW - Supersonic cluster beam deposition
UR - https://publicatt.unicatt.it/handle/10807/110201
UR - https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85038559331&origin=inward
UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85038559331&origin=inward
U2 - 10.3390/nano7120442
DO - 10.3390/nano7120442
M3 - Article
SN - 2079-4991
SP - 442
EP - 456
JO - Nanomaterials
JF - Nanomaterials
IS - 7
ER -