The goal of our project is to pattern well-defined electrodes from single-layer graphene for use in electrochemistry investigations. We have fabricated devices using both mechanically exfoliated graphene and chemical vapor deposition (CVD) graphene. Preliminary experimental data show that the graphene is chemically clean, based on measurements that the effective area of the electrodes determine...

Electrode contact impedance is a crucial factor in physiological measurements and can be an accuracy-limiting factor when performing electroencephalography and electrical impedance tomography. In this work, standard flat electrodes and micromachined multipoint spiked electrodes are characterized with a finite-element method electromagnetic solver and the dependence of the contact impedance on g...

Complete List of Authors: Kaisarlis, George; National Technical University of Athens (NTUA), School of Mechanical Engineering, Dept. of Mechanical Design & Control Systems Diplaris, Stefanos; National Technical University of Athens (NTUA), School of Mechanical Engineering, Dept. of Mechanical Design & Control Systems Sfantsikopoulos, Michael; National Technical University of Athens (NTUA), Scho...

We investigate the use of nanopatterned metallic films as transparent conductive electrodes in optoelectronic devices. We find that the physics of nanopatterned electrodes, which are often optically thin metallic films, differs from that of optically thick metallic films. We analyze the optical properties when performing a geometrical transformation that maintains the electrical properties. For...

A method to produce metal electrodes with a gap of a few nanometers with a highly focused electron beam in a transmission electron microscope (TEM) is described. With this method the electrical and geometrical characterization of the same particle is possible. The I-V characteristics of a gold particle trapped between such electrodes showed the expected single-electron tunneling behavior, with ...

A retrospective review of post-op cone beam CT (CBCT) of 8 adult patients and 14 fresh temporal bones that underwent cochlear implantation with straight flexible electrodes array was performed to determine if the position of a long and flexible electrodes array within the cochlear scalae could be reliably assessed with CBCT. An oto-radiologist and two otologists examined the images and assessed...