TY - JOUR
T1 - Thermal diffusivity monitoring during the stages of formation of core–shell structures of SiO2@Au
AU - Netzahual-Lopantzi, Angel
AU - Sánchez-Ramírez, José Francisco
AU - Saab-Rincón, Gloria
AU - Jiménez-Pérez, José Luis
N1 - Publisher Copyright:
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - The thermal and optical properties in the formation of gold nanoshells on SiO2 were studied by thermal lens (TL) and absorption spectroscopy. The formation of SiO2@Au particles was realized in four stages: First, SiO2 spheres were synthesized using the Stöber method. Later the attachment of amino groups and the adsorption of hydroxide gold nanoparticles on surface of silicon dioxide were realized. Finally, the growth of gold shell was obtained. The UV–Vis spectrum of SiO2@Au nanostructures showed an absorption band in the near-infrared region around of 740 nm associated with the presence of a gold shell on the dielectric platform. Transmission electron microscopy and scanning electron microscopy confirmed the formation of well-defined gold nanoshell on SiO2 spheres. Silicon dioxide nanospheres with an average size of 293 nm and Au-nanoshell with thicknesses of ~ 14 nm were obtained. The high crystalline quality of Au-nanoshell was demonstrated by X-ray diffraction. The thermal diffusivity during the different steps of formation of the gold nanoshell was studied using absorption spectroscopy and the mode-mismatched TL. A redshift of absorption band optic was observed by UV–Vis, and a very significant increase in the thermal diffusivity as the Au shell was completed.
AB - The thermal and optical properties in the formation of gold nanoshells on SiO2 were studied by thermal lens (TL) and absorption spectroscopy. The formation of SiO2@Au particles was realized in four stages: First, SiO2 spheres were synthesized using the Stöber method. Later the attachment of amino groups and the adsorption of hydroxide gold nanoparticles on surface of silicon dioxide were realized. Finally, the growth of gold shell was obtained. The UV–Vis spectrum of SiO2@Au nanostructures showed an absorption band in the near-infrared region around of 740 nm associated with the presence of a gold shell on the dielectric platform. Transmission electron microscopy and scanning electron microscopy confirmed the formation of well-defined gold nanoshell on SiO2 spheres. Silicon dioxide nanospheres with an average size of 293 nm and Au-nanoshell with thicknesses of ~ 14 nm were obtained. The high crystalline quality of Au-nanoshell was demonstrated by X-ray diffraction. The thermal diffusivity during the different steps of formation of the gold nanoshell was studied using absorption spectroscopy and the mode-mismatched TL. A redshift of absorption band optic was observed by UV–Vis, and a very significant increase in the thermal diffusivity as the Au shell was completed.
KW - SiO@Au nanoparticles
KW - Thermal diffusivity
KW - Thermal lens spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85084932629&partnerID=8YFLogxK
U2 - 10.1007/s00339-020-03586-3
DO - 10.1007/s00339-020-03586-3
M3 - Artículo
SN - 0947-8396
VL - 126
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 5
M1 - 392
ER -