Cong-Ying Wen, Yuzhu Chen, Rong-sheng Liu, Jiankun Huang, Dawei Wang*, Zejun Cao, Benjamin Meteku, Jingbin Zeng*. Matrix colorimetry for high-resolution visual detection of free cyanide with Au@Au–Ag yolk–shell nanoparticles. Journal of Materials Chemistry C, 2021,9, 4661-4669.