کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7835977 1503536 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
X-ray photoelectron spectroscopy on 1-peso and 2-pesos of the Argentine Republic
ترجمه فارسی عنوان
طیف سنجی فوتوالکتریک اشعه ایکس در 1 پزو و 2 پزو جمهوری آرژانتین
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
Relative concentrations of nickel and copper at the surface of the ring and centre parts of 1-peso and 2-pesos Argentine coins have been studied by means of X-ray photoemission spectroscopy (XPS). It has been observed Ni-enrichment at the surface of the ring (silvery) part of a 1-peso, minted in 1994, whereas the XPS data reveals lack of nickel at the surface of the centre (silvery) part of a 2-pesos, minted in 2016. This discrepancy is explained by analyzing the XPS peaks of oxygen and carbon, and is suggested to be related to the contamination layer on the surface of the coins. The XPS analysis of the golden parts of the coins, namely the centre part of the 1-peso and the ring part of the 2-pesos coins were inconclusive, due to the small amount of the Ni (nominally %2) used in those parts. The possible oxidations states of the metals at the surface of the untreated and treated coins with the artificial human sweat were also identified.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 436, 1 April 2018, Pages 720-731
نویسندگان
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