ナノ結晶 けっしょうじゃなかったです
nanokesshōjanakattadesu

Noun
Desu Copula
no-Adjective

The polite, past negative form of ナノ結晶

1. Wasn't nanocrystals.; Wasn't a nanocrystal.

Past/Perfective
Negative
Polite
Casual Register