Noble metal nanoparticles (NMNPs) are powerful tools in modern nanotechnology, thanks to their peculiarities: the intense surface plasmon resonance (SPR), the chemical stability and the simple surface chemistry. Many authors showed that laser ablation synthesis in solution (LASiS) is a viable and versatile technique for obtaining colloidal solutions of NMNPs.[1] NMNPs can be precisely characterized in situ by UV-visible spectroscopy with the aid of the Mie theory, providing informations about the size, aggregation level and dielectric environment of particles obtained by LASiS.[2-5] Moreover, the ability of obtaining NMNPs free in solution by LASiS allows the real time monitoring of surface functionalization by UV-visible spectroscopy.[6,7] Plasmon properties of NMNPs obtained by LASiS were exploited for a series of photonic applications: i) sodium dodecylsulphate coated gold nanoparticles (AuNPs) were used for linear and nonlinear optical modulation of the photonic band gap in artificial opals;[8,9,10] ii) unprotected gold nanoparticles blended with zinc phthalocyanines showed efficient optical limiting due to the strong multiphoton absorption properties of AuNPs and to the self healing of photofragmented nanoparticles that is promoted by phthalocyanines under laser irradiation;[11,12] iii) AuNPs conjugated with a thermoresponsive polymer were used for temperature triggered uptake in cancerous cells and were studied for photothermolysis of cancerous cells by laser irradiation;[6] iv) ultrabright surface enhanced Raman scattering labels based on NMNPs conjugated with organic dyes and stabilized with polyethylene glycol were used for quantifying the number of nanoparticles uptaken by macrophage cells.[13] Bibliography [1] V. Amendola, M. Meneghetti, Phys. Chem. Chem. Phys. 2009, 11, 3805–3821. [2] V. Amendola, M. Meneghetti, J. Phys. Chem. C 2009, 113, 4277–4285. [3] V. Amendola, S. Polizzi, M. Meneghetti; Langmuir 2007, 23, 6766 – 6770. [4] V. Amendola, S. Polizzi, M. Meneghetti; J. Phys. Chem. B 2006, 110, 7232 – 7237.
Plasmonic characterization and photonic applications of noble metal nanoparticles obtained by LASiS
AMENDOLA, VINCENZO;MENEGHETTI, MORENO
2010
Abstract
Noble metal nanoparticles (NMNPs) are powerful tools in modern nanotechnology, thanks to their peculiarities: the intense surface plasmon resonance (SPR), the chemical stability and the simple surface chemistry. Many authors showed that laser ablation synthesis in solution (LASiS) is a viable and versatile technique for obtaining colloidal solutions of NMNPs.[1] NMNPs can be precisely characterized in situ by UV-visible spectroscopy with the aid of the Mie theory, providing informations about the size, aggregation level and dielectric environment of particles obtained by LASiS.[2-5] Moreover, the ability of obtaining NMNPs free in solution by LASiS allows the real time monitoring of surface functionalization by UV-visible spectroscopy.[6,7] Plasmon properties of NMNPs obtained by LASiS were exploited for a series of photonic applications: i) sodium dodecylsulphate coated gold nanoparticles (AuNPs) were used for linear and nonlinear optical modulation of the photonic band gap in artificial opals;[8,9,10] ii) unprotected gold nanoparticles blended with zinc phthalocyanines showed efficient optical limiting due to the strong multiphoton absorption properties of AuNPs and to the self healing of photofragmented nanoparticles that is promoted by phthalocyanines under laser irradiation;[11,12] iii) AuNPs conjugated with a thermoresponsive polymer were used for temperature triggered uptake in cancerous cells and were studied for photothermolysis of cancerous cells by laser irradiation;[6] iv) ultrabright surface enhanced Raman scattering labels based on NMNPs conjugated with organic dyes and stabilized with polyethylene glycol were used for quantifying the number of nanoparticles uptaken by macrophage cells.[13] Bibliography [1] V. Amendola, M. Meneghetti, Phys. Chem. Chem. Phys. 2009, 11, 3805–3821. [2] V. Amendola, M. Meneghetti, J. Phys. Chem. C 2009, 113, 4277–4285. [3] V. Amendola, S. Polizzi, M. Meneghetti; Langmuir 2007, 23, 6766 – 6770. [4] V. Amendola, S. Polizzi, M. Meneghetti; J. Phys. Chem. B 2006, 110, 7232 – 7237.
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