Inkjet-Printed Flexible Gold Electrode Arrays for Bioelectronic Interfaces

Autor(es)

Khan, Yasser ^[1] ; Pavinatto, Felippe J. ^{[2, 1]} ; Lin, Monica C. ^[3] ; Liao, Amy ^[3] ; Swisher, Sarah L. ^{[1, 4]} ; Mann, Kaylee ^[1] ; Subramanian, Vivek ^[1] ; Maharbiz, Michel M. ^[1] ; Arias, Ana C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 - USA

^[2] Univ Sao Paulo, Phys Inst Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

^[3] Univ Calif Berkeley, Joint Grad Program Bioengn, Berkeley, CA 94720 - USA

^[4] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 - USA

• Tipo de documento: Artigo Científico
• Fonte: ADVANCED FUNCTIONAL MATERIALS; v. 26, n. 7, p. 1004-1013, FEB 16 2016.
• Citações Web of Science: 36

Resumo

Bioelectronic interfaces require electrodes that are mechanically flexible and chemically inert. Flexibility allows pristine electrode contact to skin and tissue, and chemical inertness prevents electrodes from reacting with biological fluids and living tissues. Therefore, flexible gold electrodes are ideal for bioimpedance and biopotential measurements such as bioimpedance tomography, electrocardiography (ECG), electroencephalography (EEG), and electromyography (EMG). However, a manufacturing process to fabricate gold electrode arrays on plastic substrates is still elusive. In this work, a fabrication and low-temperature sintering (similar to 200 degrees C) technique is demonstrated to fabricate gold electrodes. At low-temperature sintering conditions, lines of different widths demonstrate different sintering speeds. Therefore, the sintering condition is targeted toward the widest feature in the design layout. Manufactured electrodes show minimum feature size of 62 mu m and conductivity values of 5 x 10(6) S m(-1). Utilizing the versatility of printing and plastic electronic processes, electrode arrays consisting of 31 electrodes with electrode-to-electrode spacing ranging from 2 to 7 mm are fabricated and used for impedance mapping of conformal surfaces at 15 kHz. Overall, the fabrication process of an inkjet-printed gold electrode array that is electrically reproducible, mechanically robust, and promising for bioimpedance and biopotential measurements is demonstrated. (AU)

• Processo FAPESP: 11/05742-0 - Fabricação de biossensores usando técnicas de impressão
• Beneficiário: Felippe José Pavinatto
• Modalidade de apoio: Bolsas no Exterior - Pesquisa