Plural of epitaxy; multiple instances or types of the crystallographic process of growing ordered crystal layers on a substrate.
Regular plural of 'epitaxy,' from Greek 'epi' (upon) and 'taxis' (order/arrangement). The plural form acknowledges different methods or applications of the epitaxy process.
There are actually multiple types of epitaxy—molecular beam epitaxy, chemical vapor epitaxy, liquid phase epitaxy—each a different 'language' for atoms to learn how to arrange themselves perfectly, and this variety is why the plural matters to materials scientists.
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