Effect of synthesis time on plasmonic properties of Ag dendritic nanoforests

The effects of synthesis time on the plasmonic properties of Ag dendritic nanoforests on Si substrate (Ag-DNF/Si) samples synthesized through the fluoride-assisted galvanic replacement reaction were investigated. The Ag-DNF/Si samples were characterized using scanning electron microscopy, energy-dis...

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Bibliographic Details
Published in:IUCrJ 2022-05, Vol.9 (Pt 3), p.355-363
Main Authors: Huang, Hung Ji, Chang, Han-Wei, Lee, Chia-Yen, Shiao, Ming-Hua, Chiu, Yen-Ling, Lee, Pee-Yew, Lin, Yung-Sheng
Format: Article
Language:English
Subjects:
ag dendritic nanoforests
Analysis
Chemical engineering
crystal morphology
Diffraction
Efficiency
Energy
Energy conversion
Energy harvesting
fluoride-assisted galvanic replacement reaction
Fluorides
Fractal geometry
Fractals
Fuel cells
Light
Morphology
Plasmonics
Raman spectroscopy
Research Papers
Scanning electron microscopy
Silicon substrates
Spectrum analysis
surface plasmons
surface-enhanced raman scattering
X ray reflection
X-ray spectroscopy
X-rays
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Summary:The effects of synthesis time on the plasmonic properties of Ag dendritic nanoforests on Si substrate (Ag-DNF/Si) samples synthesized through the fluoride-assisted galvanic replacement reaction were investigated. The Ag-DNF/Si samples were characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, reflection spectroscopy, X-ray diffraction and surface-enhanced Raman spectroscopy (SERS). The prolonged reaction time led to the growth of an Ag-DNF layer and etched Si hole array. SEM images and variations in the fractal dimension index indicated that complex-structure, feather-like leaves became coral-like branches between 30 and 60 min of synthesis. The morphological variation during the growth of the Ag DNFs resulted in different optical responses to light illumination, especially those of light harvest and energy transformation. The sample achieved the most desirable light-to-heat conversion efficiency and SERS response with a 30 min growth time. A longer synthesis time or thicker Ag-DNF layer on the Si substrate did not have superior plasmonic properties.
ISSN:2052-2525
2052-2525
DOI:10.1107/S2052252522002901