作者: Pontus Linderholm , Arnaud Bertsch , Philippe Renaud
DOI: 10.1088/0967-3334/25/3/005
关键词: Methacrylate 、 Polymer 、 Microelectrode 、 Biomedical engineering 、 Electrical impedance tomography 、 Materials science 、 Electrode 、 Self-healing hydrogels 、 Electrical resistivity and conductivity 、 Ionic strength
摘要: We present the use of an array rectangular microelectrodes to discriminate between different resistivities in a thin, layered sample. Each electrode was 8 mm long and 200 nm thick. The widths ranged from 20 500 µm. electrodes were designed such that all pairs consecutive had same relative geometry, therefore identical cell constants. A hydrogel-based tissue phantom, made by photopolymerization 2-hydroxyethyl methacrylate (HEMA), developed. By changing hydrogel composition ionic strength storage medium, resistivity hydrogels could be tuned 100 Ωm kΩm. Using bipolar measurements, phantoms characterized frequency range Hz 30 MHz. distribution three-layered structure composed 120 µm sheets calculated shown agree within 7% bulk measurements. Potential clinical applications for this technique include probing epithelial skin cancer screening.