Red shift of plasmon resonance frequency due to the interacting Ag nanoparticles embedded in single crystal SiO2 by implantation

1998 ◽  
Vol 72 (15) ◽  
pp. 1823-1825 ◽  
Author(s):  
Zhengxin Liu ◽  
Honghong Wang ◽  
Hao Li ◽  
Xuemei Wang
Keyword(s):  
Single Crystal ◽  
Resonance Frequency ◽  
Plasmon Resonance ◽  
Ag Nanoparticles ◽  
Red Shift ◽  
Plasmon Resonance Frequency

Electrically controlled surface plasmon resonance frequency of gold nanorods

2006 ◽  
Vol 89 (10) ◽  
pp. 103107 ◽  
Author(s):  
K. C. Chu ◽  
C. Y. Chao ◽  
Y. F. Chen ◽  
Y. C. Wu ◽  
C. C. Chen
Keyword(s):  
Surface Plasmon Resonance ◽  
Resonance Frequency ◽  
Surface Plasmon ◽  
Gold Nanorods ◽  
Plasmon Resonance ◽  
Plasmon Resonance Frequency

Composite nanosilver structures suitable for plasmonic biosensors

2012 ◽  
Vol 1416 ◽  
Author(s):  
Georgios A. Sotiriou ◽  
Christoph O. Blattmann ◽  
Sotiris E. Pratsinis
Keyword(s):  
Particle Size ◽  
Amorphous Silica ◽  
Plasmon Resonance ◽  
Ag Nanoparticles ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
The Core ◽  
Coated Nanoparticles ◽  
Ag Particle ◽  
Plasmon Resonance Frequency

ABSTRACTSilver (Ag) nanoparticles dispersed in an amorphous silica (SiO2) matrix or coated by a SiO2 layer were synthesized by flame spray pyrolysis (FSP). The coated nanoparticles were produced by using a modified enclosed FSP setup, in which the SiO2 precursor was injected through a ring above the FSP nozzle at various burner-ring-distances (BRDs), after the core Ag nanoparticles had been formed. The produced nanoparticles were characterized by XRD, BET, TEM and UV/vis analysis. The Ag particle size was possible to be controlled by tuning the FSP parameters. For the SiO2 coated nanoparticles, larger Ag core sizes were obtained for higher BRDs. All the produced nanoparticles exhibited the characteristic plasmon resonance frequency of Ag nanoparticles.

Surface Plasmon Resonance of Ag Nanoparticles Embedded in Partially Oxidized Amorphous Si Matrix

2008 ◽  
Vol 8 (8) ◽  
pp. 4285-4289 ◽  
Author(s):  
S. Mohapatra ◽  
Y. K. Mishra ◽  
J. Ghatak ◽  
D. Kabiraj ◽  
D. K. Avasthi
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Ag Nanoparticles ◽  
Rutherford Backscattering Spectrometry ◽  
Resonant Absorption ◽  
Red Shift ◽  
Nanocomposite Films ◽  
Tem Analysis ◽  
Amorphous Si

Nanocomposite films containing Ag nanoparticles embedded in partially oxidized amorphous Si matrix were deposited on silica glass substrates by co-sputtering of Ag and Si with 1.5 keV neutral Ar atoms. The Ag content and thickness of the nanocomposite films was determined by Rutherford backscattering spectrometry. Optical absorption studies revealed the presence of surface plasmon resonance (SPR) indicating the formation of Ag nanoparticles in the as-deposited films. The position, width and strength of SPR have been found to be strongly dependent on the Ag content of the films. For annealing in oxidizing atmosphere, a significant red shift in the SPR along with a drastic reduction in the resonant absorption has been observed. The amount of red shift has been found to be dependent on the Ag content of the films. Transmission electron microscopy was used to study the size distribution, shape and crystal structure of Ag nanoparticles in the nanocomposite films. TEM analysis of annealed sample revealed the formation of silver oxide nanoshells surrounding Ag nanoparticles.

scholarly journals One-Pot Synthesis of Multi-Branch Gold Nanoparticles and Investigation of Their SERS Performance

Biosensors ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 113 ◽  
Author(s):  
Weifeng Lv ◽  
Chenjie Gu ◽  
Shuwen Zeng ◽  
Jiaguang Han ◽  
Tao Jiang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Surface Plasmon Resonance ◽  
Resonance Frequency ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
One Pot ◽  
Plasmon Resonance Frequency

Gold nanoparticles with multiple branches have attracted intensive studies for their application in sensing of low trace molecules. A large number of the merits found on the gold nanoparticles for the above applications are attributed to the strong localized surface plasmon resonance excited by the incident radiation. However, a facile and flexible way of synthesizing the multi-branch gold nanoparticles with tunable localized surface plasmon resonance frequency is still a challenge for the plasmonic research field. Herein, we report an efficient one-pot synthesis of multi-branch gold nanoparticles method that resembles a seed-medicated approach while using no further chemicals except chloroauric acid, ascorbic acid and 4-(2-Hydroxyethyl)-1-piperazinyl]-ethanesulfonic acid. By controlling the amounts of ascorbic acid volumes in the reaction mixture, the morphology and the localized surface plasmon resonance frequency of the synthesized multi-branch gold nanoparticles can be manipulated conveniently. Moreover, using the 4-Mercaptobenzoic acid as the Raman reporter, the multi-branch gold nanoparticles show superior surface-enhanced Raman spectroscopy characteristics that can be potentially used in chemical and biological sensing.

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