CIOP   05384
CENTRO DE INVESTIGACIONES OPTICAS
Unidad Ejecutora - UE
artículos
Título:
Silversilver oxide coreshell nanoparticles by femtosecond laser ablation: core and shell sizing by extinction spectroscopy
Autor/es:
D C SCHINCA, L B SCAFFARDI, F A VIDELA, G A TORCHIA, P MORENO AND L. ROSO
Revista:
JOURNAL OF PHYSICS - D (APPLIED PHYSICS)
Editorial:
IOP PUBLISHING LTD
Referencias:
Año: 2009 vol. 42 p. 215102 - 215111
ISSN:
0022-3727
Resumen:
The generation of small silver metal nanoparticles (Nps) by ultrashort pulsed laser ablation has
been an active area of research in recent years due to their interest in several fields of applied
research such as biotechnology and material research, in particular those with sizes smaller
than 10 nm. In general, laser ablation tends to produce environmentally clean metal Nps
compared with wet chemical methods. However, since silver may be oxidized in the presence
of water or ethanol, coreshell silversilver oxide (AgAg2O) Nps can be formed, whose size
and thickness must be determined and characterized for functionalization related to future
applications. This work analyses the size characteristics of coreshell AgAg2O colloid
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
and thickness must be determined and characterized for functionalization related to future
applications. This work analyses the size characteristics of coreshell AgAg2O colloid
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
and thickness must be determined and characterized for functionalization related to future
applications. This work analyses the size characteristics of coreshell AgAg2O colloid
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
2O) Nps can be formed, whose size
and thickness must be determined and characterized for functionalization related to future
applications. This work analyses the size characteristics of coreshell AgAg2O colloid
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
2O colloid
nanostructures (smaller than 10 nm) obtained by femtosecond laser ablation of solid silver
targets in different liquid media (water or ethanol) through the study of their optical extinction
spectra. A fit of full experimental spectrum using Mie theory allows the determination of core
size and shell thickness distributions as a function of fluence. The red-shift of the plasmon peak
wavelength with respect to the bare-core peak wavelength at 400 nm, produced by the oxide
shell, may be easily measured even for very small thicknesses. It was found that the dominant
Ag2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.
2O effective thickness is inversely proportional to the fluence, reaching a maximum of
0.2 nm for a fluence of 60 J cm−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.−2 and a minimum of 0.04 nm for a fluence of 1000 J cm−2.