Regenerative, highly-sensitive, non-enzymatic dopamine sensor and impact of different buffer systems in dopamine sensing
MetadataShow full item record
Carbon nanotube field-effect transistors are used extensively in ultra-sensitive biomolecule sensing applications. Along with high sensitivity, the possibility of regeneration is highly desired in bio-sensors. An important constituent of such bio-sensing systems is the buffer used to maintain pH and provide an ionic conducting medium, among its other properties. In this work, we demonstrate highly-sensitive regenerative dopamine sensors and the impact of varying buffer composition and type on the electrolyte gated field effect sensors. The role of the buffer system is an often ignored condition in the electrical characterization of sensors. Non-enzymatic dopamine sensors are fabricated and regenerated in hydrochloric acid (HCl) solution. The sensors are finally measured against four different buffer solutions. The impact of the nature and chemical structure of buffer molecules on the dopamine sensors is shown, and the appropriate buffer systems are demonstrated. © 2018 by the authors.
Showing items related by title, author, creator and subject.
Melzer K; Bhatt V; Schuster T; Jaworska E; Maksymiuk K; Michalska A; Scarpa G; Lugli P (IEEE, 2016)In this work ion-selective arrays based on spray-coated electrolyte-gated carbon-nanotube field-effect transistors will be used in an example application for water quality assessment. Several cations like Na+, K+, Ca2+ and ...
Cagatay E; Abdellah A; Lugli P; Mittendorfer P; Cheng G (IEEE, 2016)This paper presents the integration of a flexible capacitive force sensor based on carbon nanotube (CNT) thin-film with a multi-modal artificial skin cell, which is built on a hexagonal shaped, rigid, printed circuit board ...
El-Molla S; Albrecht A; Cagatay E; Mittendorfer P; Cheng G; Lugli P; Salmerón J; Rivadeneyra A (Hindawi Publishing Corporation, 2016)We present a capacitive force sensor based on a polydimethylsiloxane (PDMS) film integrated into a printed circuit board (PCB) on a flexible substrate whose layout is defined by inkjet printing. The influence of the ...