20-Sim ANSI-C code on a 8051 target

In the forth-coming version of 20-sim the option code-generation for targets will be available. After selection of a template, it’s filled in with model specific information. Then this adapted template can be compiled and linked such that it can be run on the target. Theo Lammerink designed around the often-used 8051 microcontroller a target with 64-Kb data and code memory.\ud The goal of this project was to implement a template for this target such that 20-sim code can run on it. The implementation of simulation elements within 20-sim of the target functions is completed successfully. This is shown by several simulation tests. Also the realisation of the template is accomplished.\ud Although the correct working of the template could not yet been shown, it is very likely that it will work. However some strong comments have to be made considering the speed on which the code will run and the restricted complexity of the controller that can be designed.\ud Also this project was a practical evaluation of the code-generation option of 20-sim. And some recommendations to improve it have been made:\ud - Code generation not only with floats but also with integers.\ud - Better replacement of simulation code with target c-code concerning target elements (like ADC, DAC, etc).\ud - Point out which functions are used so that only the necessary functions are compiled

Electric field controlled nanoscale contactless deposition using a nanofluidic scanning probe

A technique for contactless liquid deposition on the nanoscale assisted by an electric field is presented. By the application of a voltage between the liquid inside a (FluidFM) nanofountain pen AFM probe and a substrate, accurate contactless deposition is achieved. This technique allows for the deposition of polar liquids on non-wetting substrates. Sodium sulfate dried deposits indicate that the spot size and height increases with t$^{0.33±0.04}$ and t$^{0.35±0.10}$ , respectively. The minimum observed diameter was 70 nm. By measuring the probe deflection and the electric deposition current, we confirm that deposition is truly non-contact. We propose a simple model based on a constant stream of liquid to the substrate, which explains our observations qualitatively

Electric field controlled nanoscale contactless deposition using a nanofluidic scanning probe

A technique for contactless liquid deposition on the nanoscale assisted by an electric field is presented. By the application of a voltage between the liquid inside a (FluidFM) nanofountain pen AFM probe and a substrate, accurate contactless deposition is achieved. This technique allows for the deposition of polar liquids on non-wetting substrates. Sodium sulfate dried deposits indicate that the spot size and height increases with t$^{0.33±0.04}$ and t$^{0.35±0.10}$ , respectively. The minimum observed diameter was 70 nm. By measuring the probe deflection and the electric deposition current, we confirm that deposition is truly non-contact. We propose a simple model based on a constant stream of liquid to the substrate, which explains our observations qualitatively

AFM cantilever with in situ renewable mercury microelectrode

We report here first results obtained on a novel, in situ renewable mercury microelectrode integrated into an atomic force microscopy (AFM) cantilever. Our approach is based on a fountain pen probe with appropriate dimensions enabling reversible filling with(nonwetting) mercury under changing the applied pressure at a connected mercury supply in a dedicated experimental setup. The fountain pen probe utilizes a special design with vertical pillars inside the channel to minimize mechanical perturbation. In proof of principle experiments, dropping and hanging mercury drop were observed as a function of the applied pressure at the external mercury supply. Electrical conductivity occurred only through the mercury after filling, and the empty fountain pen probe showed excellent electrical insulation. This was demonstrated by chronoamperometric measurements in the electrolyte and by mechanical and electrical contacting of an ITO substrate with a mercury-filled and empty probe in air. Finally, cyclic voltammetry and square wave voltammetry were done in a static mercury electrode fountain pen configuration, demonstrating the principle usability of the mercury probe for electrochemical studies. Our findings are of fundamental importance as they enable further integration of a renewable mercury electrode probe into an AFM setup, which is the subject of ongoing work