Laser induced forward transfer for design of electronic noses.

LASSERRE FEDERICO; MUCKLICH F ; E RAMOS-MOORE; PABLO CAVALLO; ACEVEDO DIEGO F; CESAR BARBERO

Darmstadt

Congreso; Materials Science Engineering; 2014

Commonly referred to as electronic noses, electronic sensor arrays can detect odours using electronic response and pattern recognition systems. The detection and recognition process is similar to human olfaction and is performed for identification, comparison and quantification of volatile substances. For this, it is necessary to produce arrays of chemically diverse materials in a simple manner. Laser induced forward transfer (LIFT) is a contactless deposition process that allows, by means of a laser pulse, the transfer of a thin film from a previously deposited transparent carrier (donor) to a final substrate (acceptor). Both single and multi-material arrays are feasible, an important factor when designing more sensitive and selective gas sensors. In this work we present results concerning the transfer of two materials employed for gas sensing purposes: polyaniline and carbon nanotubes. We use a ns- Nd-YAG laser and a fs- Ti-Saphire laser to perform the transfer. The different laser configurations together with other parameters, such as the initial film thickness, the donor-acceptor gap, etc, determine the final morphology of the transferred film.