Direct Fast Patterning of Conductive Polymers Using Agarose Stamping

Abstract

A simple and versatile new method for fast micropatterning of conductive polymers has been demonstrated. Features sizes down to 2 μm have been realized in a conductive polymer (PEDOT) using a gel stamp impregnated with hypochlorite. The stamp is molded in bas‐relief which enables spatially selective transfer of a chemical deactivation agent from the stamp to the conductive polymer in areas of contact.

Flexible, all-polymer microelectrode arrays for the capture of cardiac and neuronal signals

“…However, while all-polymer electrochemical sensors [42] and PEDOT:PSS-based ion-pumps for ion homeostasis control in neurons [30] have already been described, a stand-alone polymer macroelectrode made of polypyrrole-polystyrenesulfonate has been tested for tissue integration [43], and diffuse electrical stimulation through polyaniline-based nanofibrous scaffolds has been reported to have a beneficial effect on cell proliferation and nerve outgrowth [44], there is currently no account on all-polymeric, tissue-like electrode arrays featuring conductive polymers as the only transduction element for the recording of bioelectrical signals in neuroprosthetics. Yet, recent advances in polymer material development and processing technologies propose a variety of new design and fabrication possibilities for generating stiff or flexible, all-polymeric MEAs [42,45,46]. In this context, PEDOT:PSS is a favorite candidate due to its chemical and electrical long-term stability, its relatively low interfacial impedance and its high charge storage capacity for stimulation purposes [47] even under constant polarization conditions [48].…”

Agarose‐Assisted Micro‐Contact Printing for High‐Quality Biomolecular Micro‐Patterns

“…In other applications, agarose stamps were used as a reservoir of etchant for fabricating a topographical surface of metal . Conductive polymer or nanoparticles was also capable of being patterned with agarose stamps. The advanced method that used an agarose stamp combined with electrodes was demonstrated the ability of addressable patterning .…”

Light‐Triggered Thermoelectric Conversion Based on a Carbon Nanotube–Polymer Hybrid Gel

“…The nanotube-gel hybrid can be closely glued to the smooth surface of the ceramic substrate probably because of van der Waals interactions. [17,34,35] Figure 4 a shows that the p-n junctions at the lefthand side are heated by the photoinduced nanotube-gel hybrid, while those at the right-hand side are cooled by thermal diffusion through the aluminum substrate. The flow of heat across the p-n junctions generates an electric current through the Seebeck effect.…”