DigiElch 4.0 - Overview
DigiElch is a Win32 program that computes the
electrical current and the concentration profiles for any user-defined mechanism
comprising an arbitrary number of charge-transfer steps and first- or
second-order chemical reactions. The program works for the most common electrode
geometries including the simulation of thin layer cell experiments and the exact
(two-dimensional) simulation of the electrical current response at band and disk
microelectrodes. Effects such as IR-drop and/or double layer charging can be
included in all simulations.
The basic module of the program includes only a simulator for cyclic
voltammetry. However, the functionality can be extended by purchasing
licenses for extension modules, for instance, those for chrono-amperometry or
square-wave voltammetry. Real experimental current curves (stored as U/I- or
t/I-couples in ASCII-files) can be imported into DigiElch and compared with
simulated ones. The determination of thermodynamic and kinetic parameters
involved in the underlying reaction scheme can be accomplished in this way
either by "trial and error" (DigiElch
- Standard) or by making use of the non-linear fitting procedure
implemented into DigiElch -
Watchh moviessto see program features in
DigiElch - Standard
- very fast and accurate
simulation of the current response for any user-defined mechanism that can be
compose of charge-transfer steps and first- or second-order chemical reactions.
- 1D simulation of
finite and semi-infinite diffusion processes for the most common regular
- real 2D-simulations
of such user-defined mechanisms for the band and disk electrode.
- inclusion of
IR-drop and double layer charging.
- Two different
- a very fast Fixed Grid Simulator providing
extremely high exponential converegence towards zero for the simulated flux
- a relatively slow Adaptive Grid Simulator.
The latter may be useful for simulating accurate concentration profiles and/or
for checking the accuracy of the Fixed Grid Simulator
by an independent method.
- Simulation modules are available for
- cyclic voltammetry
- square-wave voltammetry
- multi-sine impedance spectromenty
- Options for
customizing colors and style of the screen display.
- Export of the
screen display in Windows meta file format.
- Export of simulated
current curves and concentration profiles in the form of ASCII-files. Several
formatting options which enable the exported data to be imported into
third-party presentation software.
- Import of
experimental (or re-import of simulated) current curves. In this way (and
by using the Copy/Paste command) any number of such curves can be simultaneously
displayed on the screen for studying the effect of parameter variations on
simulated curves or for determining parameters yielding the "best fit" between
experimental and simulated curves using a "trial and error" strategy.
DigiElch - Professional
as reported above for DigiElch-Standard. Additionally, a non-linear regression
procedure can be used for determining the thermodynamic- and kinetic parameters
yielding the smallest possible standard deviation between simulated and
DigiElch 4.0 - Trial version
Public download of DigiElch 4.x is no longer
provided. A trial version of DigiElch 7.0 is available from
Gamry Instruments who has become a partner of ElchSoft in