Three‐dimensional Electrical Property Mapping with Nanometer Resolution

Abstract

The conductivity behavior of MWCNT networks within the volume of polymer nanocomposite samples is analyzed with nanometer resolution in all three dimensions. It is demonstrated that close to but above the percolation threshold for electrical conduction most of the MWCNTs do not contribute to the conductive network within the nanocomposite.

Graphene Network Organisation in Conductive Polymer Composites

“…Unfortunately, we had not access to composite samples with higher GR loadings; however, from Figure 5b, we can see that the conductivity did not reach its plateau level so that we assume substantial higher maximum conductivity for higher GR loadings. The broad transition range might be caused by the existence of conductive sub‐networks inside the anisotropic network in a not fully percolated system 26. Only for high GR loadings, all sub‐networks together create a single conductive network in the bulk of the PP matrix.…”

Optically and Electrically Controlled Circularly Polarized Emission from Cholesteric Liquid Crystal Materials Doped with Semiconductor Quantum Dots

“…In order to analyze the spatial distribution of QDs within the CLCM samples and to evaluate their influence on the orderliness of the bulk planar texture, we have employed a combined AFM–ultramicrotome approach using a unique NTEGRA‐Tomo device (NT‐MDT, Russia) 34, 35. This approach permits the reconstruction of the 3D structure of specimens by microtoming them along the Z axis and sequentially recording the AFM images of the block face of each section in the XY plane.…”

Nanoscaled Electrical Characterization

“…To overcome this problem a dedicated liquid cell for in-situ etching and sensing has been developed to enable the inlet and outlet of the etching solution without moving the sample [57]. Alekseev et al [58] have proposed to combine C-AFM with a microtome to cut extremely thin slices of the sample (Fig. 3.22b).…”