Enhanced second harmonic generation by double plasmon resonances in mesoscale flower-like silver particles

Abstract

We investigate second harmonic generation (SHG) response of mesoscale silver (Ag) particles. The flower-like Ag mesoparticles and Ag micro-hemispheres on an indium tin oxide coated glass substrate were prepared by a simple electrochemical deposition method. We find that the mesoscale Ag particles show a strong SHG response associated with their geometries. The dependence of the SHG on the excitation wavelength reveals that the multi-resonant response occurring at the emission wavelengths plays an important role in SHG enhancement.

Morphology-Controlled Fabrication of Large-Scale Dendritic Silver Nanostructures for Catalysis and SERS Applications

“…Therefore, it is necessary to develop a simple and efficient synthesis route of large-area and shape-controlled metal micro/nanostructures. Electrochemical deposition is a simple, powerful, and convenient technique to one-step synthesize and immobilize large-area metal micro/nanostructures onto substrates simultaneously [ 7 , 18 – 26 ]. The morphology and size of the electrodeposited metal products can be controlled by tuning the deposition conditions, such as the concentration and proportion of electrolyte solution, electrodeposition current density, and electrodeposition time.…”

“…The morphology and size of the electrodeposited metal products can be controlled by tuning the deposition conditions, such as the concentration and proportion of electrolyte solution, electrodeposition current density, and electrodeposition time. Generally, in the growth process of nanocrystals, the final morphology depends on the formation conditions departing from thermodynamic equilibrium [ 18 , 25 – 29 ]. Electrochemistry is widely used to study morphological transitions of nanocrystals in non-equilibrium growth processes.…”

“…Electrochemistry is widely used to study morphological transitions of nanocrystals in non-equilibrium growth processes. Due to the fast nucleation and growth of nanocrystals, non-equilibrium processes are important for synthesizing interesting structures with hierarchical morphologies [ 18 , 22 – 25 ]. Recently, electrochemical deposition methods have been used to fabricate various metal structures, including pyramids [ 7 ], flower-like mesoparticles [ 18 ], nanosheets [ 19 ], nanorods [ 20 , 21 ], dendrites [ 22 – 25 ], and concave hexoctahedral nanocrystals [ 26 ].…”

Spontaneous Growth of 3D Silver Mesoflowers on Poly(4‐vinylpyridine) Brushes‐Grafted‐Graphene Oxide Films and Facile Creation of Nanoporosities over their Surface

“…The morphology and structures of the obtained3 DA gN MFs are significantly different to other reported flower-like Ag particles. [22][23][24] To the best of our knowledge, no similar noble-metalm icro/nanostructures have been reportedy et. The TEM image of an individual Ag petal is showni nF igure 1(D).…”

“…When the P4VP‐g‐GO/Ag MFs film was taken out of the Ag(NH 3 ) 2 OH solution and immediately re‐immersed in NaBH 4 solution, the original smooth‐faced petals on the Ag MFs were converted into nanoporous petals, that is, Ag NMFs were obtained. The morphology and structures of the obtained 3D Ag NMFs are significantly different to other reported flower‐like Ag particles . To the best of our knowledge, no similar noble‐metal micro/nanostructures have been reported yet.…”