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Characterization of Gold Thin Films Deposited by Centuries-old Fire-gilding Method

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Title Characterization of Gold Thin Films Deposited by Centuries-old Fire-gilding Method
 
Creator Joshi, Prakash
Maharjan, Nikesh
K C, Anupam
Nakarmi, Mim Lal
 
Subject Gold films
Fire-gilding method
Surface morphology
Reflectance
 
Description 117-125
We have explored the centuries-old fire-gilding method which is being practiced by craftsmen in Nepal. In this
technique, gold films are deposited on metal by heating the paste of gold amalgam layer coated on the metal surface.
Samples of gold thin films deposited on copper substrate by this traditional method were characterized by x-ray diffraction
(XRD) for structural properties, and atomic force microscopy (AFM) and scanning electron microscopy (SEM) for surface
morphology. The XRD pattern of the samples showed the formation of polycrystalline gold film on the copper substrate.
Microstructure characterization of the surface morphologies from the AFM and SEM images showed the gold films have
porous feature with submicron size pores. We also performed optical reflectance measurements of the gold films deposited
by this method to investigate the effects of double coating of gold amalgam layers, burnishing process and iron oxide
treatment on the gold film. We found that the optical reflectance is increased as the surface smoothness is increased by
double coating and burnishing. We also found that the vivid golden luster is enhanced by iron oxide treatment due to
increased reflectance in the red spectral region.
 
Date 2022-03-04T11:16:16Z
2022-03-04T11:16:16Z
2022-02
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscair.res.in/handle/123456789/59301
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJPAP Vol.60(02) [February 2022]