Fig. 3: sSNOM phase imaging of a C. reinhardtii cell.
From: Infrared nanoscopy and tomography of intracellular structures

A single cellular cross section was visualized by AFM topography (a) and sSNOM phase imaging at several wavenumbers (b–f), with red indicating high and blue indicating low absorption of each respective wavenumber. Scale bar equals 1 µm.