Nanocomposite materials obtained by laser techniques for flexible electronic devices



The main objective of the project is the development of conducting rGO-based materials using laser techniques. GO has several advantages, it can be produced using inexpensive graphite as raw material by cost-effective chemical methods with a high yield, and owing to its highly hydrophilic character is can form stable aqueous colloids. However, GO typically shows poor electrical conductivity which restricts its application fields. As a consequence, a key research topic is the development of new reduction techniques, to produce graphene-like materials, which partly reproduce the structure and electrical properties of graphene. In order to further enhance the electrical conductivity or rGO, the addition of other highly conductive nanomaterials, single and multiwall CNTs, and noble metal nanoparticles is foreseen in the frame of this project. The developed laser-based methods are versatile, eco-friendly and easy to be implemented in industrial processes.


Laser processing:

- Nd:YAG solid state laser source Brilliant B from Quantel, France, with 1064 nm, 532 nm, and 266 nm emission wavelengths
- Laser pulse energy control and measurement system from Gentec Electro-Optics, Canada
- CCD camera and optical elements from Melles Griot and Thorlabs
- laser beam homogenizer from Bayerisches Laserzentrum GmbH, Germany
- micrometric XYZ positioning table with control unit
- computers and software for automated processing

-Sample characterization techniques:

- UV-Vis spectrophotometer from Shimadzu, Japan
- high sensitive DC and pulsed electrical measurements: two- and four-probe micro-electrical measurements probe station from Everbeing, equipped with 4 tip micro-positioners, stereomicroscope, sample holder with vacuum chunk, and Keithley 2612A double source-meter system
- photoreactor from LuzChem, Canada, equipped with lamps emitting in the UV and visible spectral ranges, simulating the solar radiation
- Computing workstation for numerical simulations of laser-material interaction processes

Results dissemination

Publications in ISI quoted journals:

A. Querlato, A. Datcu, A. Perez del Pino, C. Logofatu, E. Gyorgy : "Reduced Graphene Oxide / Iron Oxide Nanocomposite Films grown by Matrix Assisted Pulsed Laser Evaporation", Submitted for publication, RSC Advanced, IF=3.108

Book chapter:

E. Gyorgy, A. Perez del Pino, A. Datcu, L. Duta, C. Logofatu, A. Duta : "Wetting and photoactive properties of graphene oxide / titanium oxide / noble metal nanocomposite coatings obtained by laser techniques" in "Graphene Oxide: Advances in Research and Application", Nova Science Publishers, Inc., Ed. A. K. Mishra