Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/62184
Título: | Neural electrode array based on aluminum: fabrication and characterization |
Autor(es): | Peixoto, Alexandre Coumiotis Moreira Gonçalves, Sandra Beatriz Tomé Ferreira da Silva, Alexandre Dias, Nuno Sérgio Mendes Correia, J. H. |
Palavras-chave: | Invasive electrode Recording Stimulation Iridium oxide Aluminum Electrode array Sharp tips |
Data: | 2013 |
Editora: | IEEE |
Revista: | IEEE Sensors Journal |
Resumo(s): | A unique neural electrode design is proposed with 3 mm long shafts made from an aluminum-based substrate. The electrode is composed by 100 individualized shafts in a 10 × 10 matrix, in which each aluminum shafts are precisely machined via dicing-saw cutting programs. The result is a bulk structure of aluminum with 65 ° angle sharp tips. Each electrode tip is covered by an iridium oxide thin film layer (ionic transducer) via pulsed sputtering, that provides a stable and a reversible behavior for recording/stimulation purposes, a 40 mC/cm 2 charge capacity and a 145 Ω impedance in a wide frequency range of interest (10 Hz-100 kHz). Because of the non-biocompatibility issue that characterizes aluminum, an anodization process is performed that forms an aluminum oxide layer around the aluminum substrate. The result is a passivation layer fully biocompatible that furthermore, enhances the mechanical properties by increasing the robustness of the electrode. For a successful electrode insertion, a 1.1 N load is required. The resultant electrode is a feasible alternative to silicon-based electrode solutions, avoiding the complexity of its fabrication methods and limitations, and increasing the electrode performance. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/62184 |
DOI: | 10.1109/JSEN.2013.2270034 |
ISSN: | 1530-437X |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | ICVS - Artigos em revistas internacionais / Papers in international journals |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Peixoto-2013-Neural-electrode-array-based-on-alu.pdf Acesso restrito! | 1,03 MB | Adobe PDF | Ver/Abrir |