Surface potential images

The information obtained from the simultaneously acquired topographic and surface potential images allows us to propose a model for the structure of 8CB in various wetting... 

Keywords Atomic force microscopy Charge dissipation Charge domains Electric charges on polymer surfaces Electric field imaging mode Surface potential imaging mode... 

Fig. 21. Dependence of DFM-AFM lithography on the pulse bias voltage and the application time of pulse bias (a) illustration of the pulse bias voltage and application time of pulse bias used, (b) topographic image and (c) surface potential image.

Fig. 24. Surface potential images for the ODS-SAM surfaces after DFM-AFM lithography (a) in vacuum (3.5 x 10 4Pa, 24 °C) and (b) in dry nitrogen (relative humidity <1%,24°C).

Fig. 27. Selective immobilization of the FAS17-SAM on the nanopatterned ODS-SAM substrate (a) surface potential image, (b) topographic one and (c) illustration of the nanopatterned ODS-SAM, and (d) surface potential image, (e) topographic one and (f) illustration of the ODS-SAM/FAS17 SAM.

Fig. 2. Surface potential image and horizontal relief of a vertical line written on the ferroelectric LB film in a contact mode with Udc= -15V applied to the bottom electrode with respect to the grounded cantilever. Reading in a non-contact mode.

Fig. 2 Topography (a) and the surface potential image (b) observed from the test sample by the SMM.

A marked difference in spatial resolution between the surface potential and topography images is also quite obvious. In the topography image the roughness on the silicon surface, which was presumably caused by the RIE process, is visible just as revealed by the SEM picture. In the surface potential image, on the other hand, although the periodic modulation of potential is... 

Figure 5. A) Surface potential image of a microarray of buffer, neutravidin, biotinylated-BSA and neutravidin- biotinylated-BSA complex. B) Array map showing the exact position of duplicates B represents buffer without protein, N represents neutravidin, B-BSA represents biotinylated-BSA, C represents the neutravidin -biotinylated-BSA complex.

Saito, N., Hayashi, K., Sugimura, H., Takai, O., and Nakagiri, N. (2002) Surface potential images of self-assembled monolayers patterned by organosilanes ab initio molecular orbital calculations. Surf. Interface Anal, 34, 601-605. 

---