Fig. 3: Confocal Raman microscopy of a flat punch residual imprint on ZIF-8 monolith.
From: Stress–strain relationships and yielding of metal-organic framework monoliths
a Representative Raman spectra taken outside and inside the residual indent. The insets show details of the stress-induced blue-shift of the 686 cm-1 band (Im ring puckering) and red-shift of the 3114 cm-1 and 3135 cm-1 bands (C−H stretching in the Im ring). b Optical micrograph of the indent. c, d Contour maps indicating the spectral shift of some of the characteristic phonon bands of ZIF-8, i.e., 686 cm-1 and 3135 cm-1, respectively.
