Medieval nanotechnology: Thickness determination of Zwischgold samples
نویسندگان
چکیده
• Focused study aiming at technological parameters of corroded Mediaeval Zwischgold. Gold layer in a nanoscale thickness range 20–50 nm, with the peak 30 nm. Full foil (50–260 nm) obtained from EDX derived Ag/Au weight ratio. Ultra-high-resolution SEM measurements, supported by STEM and RBS. Scientific evidence for paleness A special gilding material called Zwischgold has been frequently observed medieval gilded artefacts. As bilayer metal leaf made gold silver, it exhibits similar but slightly paler golden colour tone compared to pure gold. surface can be darkened quickly due corrosion its silver base. Despite frequent mentions guild statutes, production important have under veil secrecy since Middle Ages. Here, we examine thicknesses materials proportions Zwischgold, through high-resolution scanning electron microscopy coupled energy dispersive X-ray analysis (SEM-EDX) on large number samples taken late sculptures. We observe that contains ultra-thin layers ca. indicating employment high-precision technologies manufacturing delicate art period. It further clarifies some ambiguity history, regarding appearance supportive data, Rutherford backscattering spectrometry (RBS) transmission (STEM) were applied, order confirm precision accuracy sample preparation analysis.
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ژورنال
عنوان ژورنال: Journal of Cultural Heritage
سال: 2021
ISSN: ['1296-2074', '1778-3674']
DOI: https://doi.org/10.1016/j.culher.2021.01.010