Silver nanoparticles（Ag NPs） were successfully assembled in porous anodic alumina（AAO） templates via a green silver mirror reaction.The Ag NPs/AAO composite templates then were characterized by field emission scan...Silver nanoparticles（Ag NPs） were successfully assembled in porous anodic alumina（AAO） templates via a green silver mirror reaction.The Ag NPs/AAO composite templates then were characterized by field emission scanning electron microscopy（FESEM）,energy-dispersive X-ray microanalysis（EDX）,and X-ray diffraction（XRD）.Furthermore,the photoluminescence（PL） properties were also investigated.Compared with the blank AAO,the PL intensity of Ag NPs/AAO templates are enhanced and the maximum enhancement is 2.58 times.Based on the local electric field enhancement effect,the theoretical values were also deduced,which are basically coincident with the experimental.展开更多
Ag island films with different sizes are deposited on hydrogenated amorphous silicon carbide （a-SiC：H） films, and the influences of Ag island films on the optical properties of the tx-SiC：H films are investigated....Ag island films with different sizes are deposited on hydrogenated amorphous silicon carbide （a-SiC：H） films, and the influences of Ag island films on the optical properties of the tx-SiC：H films are investigated. Atomic force microscope images show that Ag nanoislands are formed after Ag coating, and the size of the Ag islands increases with increasing Ag deposition time. The extinction spectra indicate that two resonance absorption peaks which correspond to out-of-plane and in-plane surface plasmon modes of the Ag island films are obtained, and the resonance peak shifts toward longer wavelength with increasing Ag island size. The photoluminescence （PL） enhancement or quenching depends on the size of Ag islands, and PL enhancement by 1.6 times on the main PL band is obtained when the sputtering time is 10 min. Analyses show that the influence of surface plasmons on the PL of a-SiC：H is determined by the competition between the scattering and absorption of Ag islands, and PL enhancement is obtained when scattering is the main interaction between the Ag islands and incident light.展开更多
基金the National Natural Science Foundation of China (Grand Nos.60878031,J0830308)the National Basic Research Programme of China (Grant No.2006CB302902)the Natural Science Foundation of Chaohu College (Grant No.XLY-200813)
文摘Silver nanoparticles（Ag NPs） were successfully assembled in porous anodic alumina（AAO） templates via a green silver mirror reaction.The Ag NPs/AAO composite templates then were characterized by field emission scanning electron microscopy（FESEM）,energy-dispersive X-ray microanalysis（EDX）,and X-ray diffraction（XRD）.Furthermore,the photoluminescence（PL） properties were also investigated.Compared with the blank AAO,the PL intensity of Ag NPs/AAO templates are enhanced and the maximum enhancement is 2.58 times.Based on the local electric field enhancement effect,the theoretical values were also deduced,which are basically coincident with the experimental.
基金Project supported by the Key Basic Research Project of Hebei Province, China (Grant No. 12963929D)the Natural Science Foundation of Hebei Province,China (Grant Nos. F2012201007 and F2012201042)
文摘Ag island films with different sizes are deposited on hydrogenated amorphous silicon carbide （a-SiC：H） films, and the influences of Ag island films on the optical properties of the tx-SiC：H films are investigated. Atomic force microscope images show that Ag nanoislands are formed after Ag coating, and the size of the Ag islands increases with increasing Ag deposition time. The extinction spectra indicate that two resonance absorption peaks which correspond to out-of-plane and in-plane surface plasmon modes of the Ag island films are obtained, and the resonance peak shifts toward longer wavelength with increasing Ag island size. The photoluminescence （PL） enhancement or quenching depends on the size of Ag islands, and PL enhancement by 1.6 times on the main PL band is obtained when the sputtering time is 10 min. Analyses show that the influence of surface plasmons on the PL of a-SiC：H is determined by the competition between the scattering and absorption of Ag islands, and PL enhancement is obtained when scattering is the main interaction between the Ag islands and incident light.
基金supported by the National Natural Science Foundation of China(62375079,52072117,62375081,52221001,51972105,62090035,U19A2090,and 61905071)the National Key R&D Program of China(2022YFA1204300)+4 种基金the Key Program of Science and Technology Department of Hunan Province(2019XK2001 and 2020XK2001)the Key Research and Development Plan of Hunan Province(2023GK2012)the Open Project Program of Key Laboratory of Nanodevices and Applications,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences(22ZS01)the Hunan Provincial Natural Science Foundation of China(2021JJ30132)the China Scholarship Council.
