Laser-induced forward transfer of single-walled carbon nanotubes
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The objective of this work is the application of laser-induced forward transfer (LIFT) for the fabrication of chemiresistor sensors. The receiver substrate is an array with metal electrodes and the active materials placed by LIFT are single-walled carbon nanotubes (SWCNT). The functionality of such sensors depends on the geometry of the active material onto the metallic electrodes. First the best geometry for the sensing materials and electrodes was determined, including the optimization of the process parameters for printing uniform pixels of SWCNT onto the sensor electrodes. The sensors were characterized in terms of their sensing characteristics, i.e., upon exposure to ammonia, proving the feasibility of LIFT.
Financial support from the Scientific Exchange Programme between Switzerland and the New Member States of the European Union (Sciex-NMS), through the Rectors Conference of the Swiss Universities (CRUS) project ALECSA “Application of laser-induced forward transfer for the fabrication of a flexible carbon nanotube sensor array” is gratefully acknowledged.