Manuel Jahn, Georgii Gvindzhiliia, Thomas Klar,
"Electrically conductive, sub-micron sized organic wires made from Polypyrrole"
, in Johannes Kepler University Linz: 73rd Annual Meeting of the Austrian Physical Society (ÖPG), 9-2024
Original Titel:
Electrically conductive, sub-micron sized organic wires made from Polypyrrole
Sprache des Titels:
Englisch
Original Buchtitel:
73rd Annual Meeting of the Austrian Physical Society (ÖPG)
Original Kurzfassung:
Organic electronics represents a rapidly expanding field characterized by its unique
properties, including flexibility, low cost, biocompatibility and tunability. These offer
significant advantages over its well-established inorganic counterparts. This
versatility enables their excellence in applications such as wearable electronics,
sensors, particularly biosensors, and various other, especially low-power devices [1].
However, the micromanufacturing of organic electronics presents a challenge due to
limited compatibility with established patterning techniques designed for inorganic
materials, such as UV or e-beam lithography. Innovative approaches employing red
photons of low quantum energies are thus imperative to tailor manufacturing
processes to accommodate and utilize these distinctive properties for more efficient
patterning.
This study presents a novel method for producing sub-micron-sized organic wires. By
scanning a femtosecond laser over liquid pyrrole, we induce multiphoton absorption,
leading to polymerization and the formation of solid wires. This process enables rapid
production of miniature electronic structures in customizable patterns, facilitating
the development of fast and flexible electronics [2]. Additionally, the process can be
enhanced by incorporating photo starters like 7-diethylamino-3-thenoylcoumarin
(DETC) or dopants to optimize the results for specific applications, potentially
allowing the production of semiconductor structures such as diodes or transistors.
The produced wires exhibit widths of less than a micron and heights of less than 50
nanometers, maintaining consistency across lengths of at least 200 microns when
characterized with an AFM. They demonstrate a specific conductivity of 100 S/cm and
exhibit characteristics of an ohmic resistor in 4-probe measurements.
Forschungs-