Synthesis of elongated Au nanoparticles in silica matrix by ion irradiation

Synthesis of elongated Au nanoparticles in silica matrix by ion irradiation

The present work reports the synthesis of elongated Au nanoparticles (NPs) parallel to each other, embedded in silica matrix. Au NPs in silica, prepared using rf magnetron sputtering, were irradiated by 120 MeV Au ions at different fluences to induce elongation. Optical absorption study of irradiate...

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Veröffentlicht in:Applied physics letters 2007-08, Vol.91 (6), p.063103-063103-3
Hauptverfasser: Mishra, Y. K., Singh, F., Avasthi, D. K., Pivin, J. C., Malinovska, D., Pippel, E.
Format: Artikel
Sprache:eng
Schlagworte:
ABSORPTION
ASPECT RATIO
COMPOSITE MATERIALS
ELONGATION
GOLD IONS
IRRADIATION
MATERIALS SCIENCE
MEV RANGE 100-1000
NANOSTRUCTURES
PARTICLES
PLASMONS
SILICA
SPUTTERING
SURFACE COATING
SYNTHESIS
THERMAL SPIKES
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY
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Zusammenfassung:The present work reports the synthesis of elongated Au nanoparticles (NPs) parallel to each other, embedded in silica matrix. Au NPs in silica, prepared using rf magnetron sputtering, were irradiated by 120 MeV Au ions at different fluences to induce elongation. Optical absorption study of irradiated film showed a clear splitting of surface plasmon bands corresponding to transverse and longitudinal modes. Transmission electron microscopy investigations of pristine and irradiated samples revealed an elongation (aspect ratio of ∼ 3.5 ) in Au NPs occurred as a result of irradiation. The results are discussed in the framework of thermal spike model.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2764556