Fig. 3: Proposed structure of the Cu(Cys)2 system.
From: Insulator-to-metal-like transition in thin films of a biological metal-organic framework

a Structural view from the a-axis (left panel), b-axis (middle panel), and c-axis (right panel) where carbon, hydrogen, nitrogen, oxygen, sulfur, and copper atoms are represented by gray, white, blue, red, dark cyan and orange colors, respectively. b HRTEM image of the Cu(Cys)2 sample (inset: corresponding fast-Fourier transform (FFT) image). c Inverse fast-Fourier transform (IFFT) pattern extracted from the HRTEM image showing a good overlap with the crystal structure along (100) direction.