TY - JOUR
T1 - Photo-thermal study of a layer of randomly distributed gold nanoparticles
T2 - From nano-localization to macro-scale effects
AU - Pezzi, Luigia
AU - Palermo, Giovanna
AU - Veltri, Alessandro
AU - Cataldi, Ugo
AU - Bürgi, Thomas
AU - Ritacco, Tiziana
AU - Giocondo, Michele
AU - Umeton, Cesare
AU - De Luca, Antonio
N1 - Funding Information:
The authors thank L De Sio and V Caligiuri for the fruitful scientific discussions. The research leading to these results has received support and funding from the Italian Project ‘NanoLase’—PRIN 2012, Protocol No. 2012JHFYMC. The research is supported by the Air Force Office of Scientific Research (AFOSR), Air Force Research Laboratory (AFRL), US Air Force, under grant FA9550-14-1-0050 (EOARD 2014/2015) and by the CNR User Facility ‘Materials and processes BEYOND the NANO scale’, Beyond ’Nano, Pole of Cosenza, cod. PONa3-00362.
PY - 2017/9/27
Y1 - 2017/9/27
N2 - We present an experimental characterization and a comprehensive theoretical modeling of macroscopic plasmonic heat production that takes place in a single layer of small gold nanoparticles (GNPs), randomly distributed on a glass substrate, covered with different host media and acted on by a resonant radiation. We have performed a detailed experimental study of the temperature variations of three different systems, obtained by varying the density of nanoparticles. Due to the macroscopic dimension of the spot size, the used laser irradiates a huge number of nanoparticles, inducing a broad thermo-plasmonic effect that modifies the thermal conductivity of the entire system; starting from the state of art, we have implemented a simple model that enables to evaluate the resulting new thermal conductivity. We have also extended our theoretical approach to the macroscale, including an analysis of the effects predicted for different NP densities and laser spot size values, as well as for different values of the laser intensity, which can be as low as 0.05 W cm-2. Theoretically predicted temperature variations are in excellent agreement with experimental results.
AB - We present an experimental characterization and a comprehensive theoretical modeling of macroscopic plasmonic heat production that takes place in a single layer of small gold nanoparticles (GNPs), randomly distributed on a glass substrate, covered with different host media and acted on by a resonant radiation. We have performed a detailed experimental study of the temperature variations of three different systems, obtained by varying the density of nanoparticles. Due to the macroscopic dimension of the spot size, the used laser irradiates a huge number of nanoparticles, inducing a broad thermo-plasmonic effect that modifies the thermal conductivity of the entire system; starting from the state of art, we have implemented a simple model that enables to evaluate the resulting new thermal conductivity. We have also extended our theoretical approach to the macroscale, including an analysis of the effects predicted for different NP densities and laser spot size values, as well as for different values of the laser intensity, which can be as low as 0.05 W cm-2. Theoretically predicted temperature variations are in excellent agreement with experimental results.
KW - nanoparticles
KW - optics
KW - plasmonics
KW - thermo-plasmonics
UR - http://www.scopus.com/inward/record.url?scp=85032220619&partnerID=8YFLogxK
U2 - 10.1088/1361-6463/aa8618
DO - 10.1088/1361-6463/aa8618
M3 - Artículo
AN - SCOPUS:85032220619
SN - 0022-3727
VL - 50
JO - Journal of Physics D: Applied Physics
JF - Journal of Physics D: Applied Physics
IS - 43
M1 - 435302
ER -