Pulsed electropolymerization of PEDOT enabling controlled branching

by:INDUSTRIAL-MAN     2019-09-28
The growth of conductive polymers can be controlled by electrolysis to achieve defined surface modifications and can be used as a rapid prototyping process.
In this study, poly (3,4-
Ethyl dithiated)in a two-
Electrode setup was studied with pulse voltage
The driving electric polymerization of the precursor EDOT and the low concentration of tetryl over-ammonium chloride dissolved in acetone.
By changing the reduction voltage and duty cycle, the rapid growth of different polymer shapes is reliably realized.
The obtained structure is detected and quantified by using the fractal dimension.
Their shapes range from solid coatings on the branch fractal to straight fibers that do not require any templates.
These fast and controllable electrical polymerization processes are further combined to increase the complexity of conductors.
Organic conductors are considered the next generation of electronic and optical devices.
Their adjustable mechanical and electrical properties (e. g.
, Their flexibility and solid large active surface)
Compared with mature electronic products, it has unique functions.
Especially poly (3,4-
Ethyl dithiated)(PEDOT)
As π-
It is widely used in many fields of neuroscience. ,,]
Surface Modification]
Solar technology]].
While material properties and surfaces are defined primarily by supporting salts or antiions, the external shape is difficult to control if the template is not used.
Recently, it has been shown that pulsed electrical polymerization is a possible candidate for the realization of another degree of freedom [, ]. A low-frequency zero-
An average voltage was applied to the gold wire and strong directional growth was observed.
The use of different antiions [also achieved a change in growth to a stronger branch]]
Or space restrictions []
Based on these studies, we investigate the effects of voltage amplitude other than zero
Average waveform and duty cycle (DF)of low-
Frequency 5Hz electropolyization.
We assume that the one-way strength of the electric field is not only critical to the electrical polymerization process, for example, known from the insulation failure that forms the electrical tree.
We also believe that pure diffusion is not the only factor in forming a fractal structure, as is known from crystal formation,, the alternating depletion and accumulation of free radical ions that cause the electrode interface PEDOT also ultimately controls the final structure.
Based on the bipolar electric polymerization experiment, the electrolytic reaction system is simplified, and the metal conductor directly provides the charge of pure oxidation of EDOT.
Due to the migration of live species, a very low support salt concentration is also selected for high quality transport.
This is predicted by the theoretical description reported elsewhere, which uses a nerster-mapo-Poisson model without electrical neutrality, which well describes the system\'s, ].
Therefore, the anode voltage of the EDOT oxidation is fixed to provide free radical cation near the electrode, which is subsequently converted into dication and further aggregated into a conductive PEDOT structure.
In the case of a fixed frequency of 5 hz, different negative voltages are used to change the duration of the anode phase and the staggered cathode phase.
To the author\'s knowledge, this work is the first report of pulse and asymmetric electrical polymerization.
The branch and growth dynamics were evaluated and classified and the results were given using a vivid model.
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