Au–Ag nanoalloy molecule-like clusters for enhanced quantum efficiency emission of Er3+ ions in silica. Cesca, T., Kalinic, B., Michieli, N. T., Maurizio, C., Angela, T., Scian, C., Giancarlo, B., Mazzoldi, P., & Mattei, G. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 17:28262–28269, 2015. doi abstract bibtex The occurrence of a very efficient non-resonant energy transfer process forming ultrasmall Au–Ag nanoalloy clusters and Er3+ ions is investigated in silica. The enhancement of the room temperature Er3+ emission efficiency by an order of magnitude is achieved by coupling rare-earth ions to molecule-like (AuxAg1x)N alloy nanoclusters with N = 10–15 atoms and x = 0.6 obtained by optimized sequential ion implantation on Er-implanted silica. For comparison, AuN nanoclusters obtained by the same approach and with the same size and numerical density showed an enhancement by only a factor of 2 with respect to pure Er emission, demonstrating the beneficial effect of using nanoalloyed clusters. The temperature evolution of the energy transfer process is investigated by photoluminescence and exhibits a maximum efficiency at about 600 °C, where the clusters reach the optimal size and the silica matrix completely recovers the implantation damage. The nanoalloy cluster composition and size have been studied by EXAFS analysis, which indicated a stronger Ag–O interaction with respect to the Au–O one and a preferential location of the Ag atoms at the nanoalloy cluster surface.
@article{
11577_3156459,
author = {Cesca, Tiziana and Kalinic, Boris and Michieli, Niccolo' Tomaso and Maurizio, Chiara and Angela, Trapananti and Scian, Carlo and Giancarlo, Battaglin and Mazzoldi, Paolo and Mattei, Giovanni},
title = {Au–Ag nanoalloy molecule-like clusters for enhanced quantum efficiency emission of Er3+ ions in silica},
year = {2015},
journal = {PHYSICAL CHEMISTRY CHEMICAL PHYSICS},
volume = {17},
abstract = {The occurrence of a very efficient non-resonant energy transfer process forming ultrasmall Au–Ag nanoalloy clusters and Er3+ ions is investigated in silica. The enhancement of the room temperature Er3+ emission efficiency by an order of magnitude is achieved by coupling rare-earth ions to molecule-like (AuxAg1x)N alloy nanoclusters with N = 10–15 atoms and x = 0.6 obtained by optimized sequential ion implantation on Er-implanted silica. For comparison, AuN nanoclusters obtained by the same approach and with the same size and numerical density showed an enhancement by only a factor of 2 with respect to pure Er emission, demonstrating the beneficial effect of using nanoalloyed clusters. The temperature evolution of the energy transfer process is investigated by photoluminescence and exhibits a maximum efficiency at about 600 °C, where the clusters reach the optimal size and the silica matrix completely recovers the implantation damage. The nanoalloy cluster composition and size have been studied by EXAFS analysis, which indicated a stronger Ag–O interaction with respect to the Au–O one and a preferential location of the Ag atoms at the nanoalloy cluster surface.},
doi = {10.1039/C5CP01084E},
pages = {28262--28269}
}
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T.","Maurizio, C.","Angela, T.","Scian, C.","Giancarlo, B.","Mazzoldi, P.","Mattei, G."],"bibdata":{"bibtype":"article","type":"article","author":[{"propositions":[],"lastnames":["Cesca"],"firstnames":["Tiziana"],"suffixes":[]},{"propositions":[],"lastnames":["Kalinic"],"firstnames":["Boris"],"suffixes":[]},{"propositions":[],"lastnames":["Michieli"],"firstnames":["Niccolo'","Tomaso"],"suffixes":[]},{"propositions":[],"lastnames":["Maurizio"],"firstnames":["Chiara"],"suffixes":[]},{"propositions":[],"lastnames":["Angela"],"firstnames":["Trapananti"],"suffixes":[]},{"propositions":[],"lastnames":["Scian"],"firstnames":["Carlo"],"suffixes":[]},{"propositions":[],"lastnames":["Giancarlo"],"firstnames":["Battaglin"],"suffixes":[]},{"propositions":[],"lastnames":["Mazzoldi"],"firstnames":["Paolo"],"suffixes":[]},{"propositions":[],"lastnames":["Mattei"],"firstnames":["Giovanni"],"suffixes":[]}],"title":"Au–Ag nanoalloy molecule-like clusters for enhanced quantum efficiency emission of Er3+ ions in silica","year":"2015","journal":"PHYSICAL CHEMISTRY CHEMICAL PHYSICS","volume":"17","abstract":"The occurrence of a very efficient non-resonant energy transfer process forming ultrasmall Au–Ag nanoalloy clusters and Er3+ ions is investigated in silica. The enhancement of the room temperature Er3+ emission efficiency by an order of magnitude is achieved by coupling rare-earth ions to molecule-like (AuxAg1x)N alloy nanoclusters with N = 10–15 atoms and x = 0.6 obtained by optimized sequential ion implantation on Er-implanted silica. For comparison, AuN nanoclusters obtained by the same approach and with the same size and numerical density showed an enhancement by only a factor of 2 with respect to pure Er emission, demonstrating the beneficial effect of using nanoalloyed clusters. The temperature evolution of the energy transfer process is investigated by photoluminescence and exhibits a maximum efficiency at about 600 °C, where the clusters reach the optimal size and the silica matrix completely recovers the implantation damage. The nanoalloy cluster composition and size have been studied by EXAFS analysis, which indicated a stronger Ag–O interaction with respect to the Au–O one and a preferential location of the Ag atoms at the nanoalloy cluster surface.","doi":"10.1039/C5CP01084E","pages":"28262–28269","bibtex":"@article{\n\t11577_3156459,\n\tauthor = {Cesca, Tiziana and Kalinic, Boris and Michieli, Niccolo' Tomaso and Maurizio, Chiara and Angela, Trapananti and Scian, Carlo and Giancarlo, Battaglin and Mazzoldi, Paolo and Mattei, Giovanni},\n\ttitle = {Au–Ag nanoalloy molecule-like clusters for enhanced quantum efficiency emission of Er3+ ions in silica},\n\tyear = {2015},\n\tjournal = {PHYSICAL CHEMISTRY CHEMICAL PHYSICS},\n\tvolume = {17},\n\tabstract = {The occurrence of a very efficient non-resonant energy transfer process forming ultrasmall Au–Ag nanoalloy clusters and Er3+ ions is investigated in silica. The enhancement of the room temperature Er3+ emission efficiency by an order of magnitude is achieved by coupling rare-earth ions to molecule-like (AuxAg1x)N alloy nanoclusters with N = 10–15 atoms and x = 0.6 obtained by optimized sequential ion implantation on Er-implanted silica. For comparison, AuN nanoclusters obtained by the same approach and with the same size and numerical density showed an enhancement by only a factor of 2 with respect to pure Er emission, demonstrating the beneficial effect of using nanoalloyed clusters. The temperature evolution of the energy transfer process is investigated by photoluminescence and exhibits a maximum efficiency at about 600 °C, where the clusters reach the optimal size and the silica matrix completely recovers the implantation damage. The nanoalloy cluster composition and size have been studied by EXAFS analysis, which indicated a stronger Ag–O interaction with respect to the Au–O one and a preferential location of the Ag atoms at the nanoalloy cluster surface.},\n\tdoi = {10.1039/C5CP01084E},\n\tpages = {28262--28269}\n}\n","author_short":["Cesca, T.","Kalinic, B.","Michieli, N. 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