Fig. 5: HRTEM and iDPC-STEM characterizations of CNS.
From: Synthesis of a magnetic π-extended carbon nanosolenoid with Riemann surfaces
a (I) A HRTEM image showing the 2D helical self-assembled CNS. The experiment was carried out on JEM ARM-200F microscope operated at 200 kV. (II) An enlarged area HRTEM image of the white rectangle in (I). (III) The FFT pattern from the white rectangle in (I). b (I) Low-dose iDPC-STEM image showing the single-strand CNS. (II) Simulated projected potential (amorphous carbon substrate) of the CNS. A specific point-spread-function (PSF) width of 1.5 Å was used for CNS. Statistical analysis of CNS samples shows that measured helical pitch (p′) and width (D′) values are mainly distributed at 0.40 ± 0.03 nm and 2.7 ± 0.2 nm, respectively. (III) structural model of the CNS. Statistical analysis shows that the helical pitch (p) and width (D) calculated by DFT are ~0.41 nm and ~2.88 nm, respectively (with alkyl sidechains).
