- Understanding the physics of new multifunctional MO nanoparticles (ZnO, CuOx, TiOx) with exceptional performances at nanoscale, using low-cost fabrication technologies as DLW combined with self-heating combustion reactions for T<150C, In free semiconductors (n-type: ZTO (DOI: 10.1038/s41467-022-28459-6); p-type: SnO; CuAlO2; Halide Perovskites (DOI10.1021/acsnano.0c02862); conductors (AgNW/AlOx Nanocomposites (DOI10.1021/acsaelm.2c01007); ZnO:H; graphene and carbon nanotubes, dielectrics (ZrO; nanocellulose; AlOx; ZAO; Hybrid (Ag)ZnO/Cs/PMMA nanocomposite) and electrochromic (WO3; TiO2) materials compatible with flexible substrates. Processing inverters, dual gate transistors, amplifiers, and logic gates on flexible substrates all ink/screen printing based, DOI10.1002/admt.202100633.
Figure 1- ZTO multiple transistors from 6 fibres, showing uniform & reproducible process, DOI: 10.1038/s41467-022-28459-6
Figure 2. Evolution of ON and OFF currents and as a function of time and number of scans used, of p-type TFT, (DOI10.1021/acsnano.0c02862).
Figure 3. Flexible planar handwritten logic-gates on a single sheet office paper with driving printed ZnO EGTs gated by CICH and pencil-drawn resistances as the load (DOI10.1002/admt.202100633).
Figure 4. Images of the electrochromic samples produced through laser irradiation in air of ITO glass substrates with two and three layers of the precursor solution.
- Alternative conductors using DLW on silver and LIG (Fig5)
Figure 5 – a) Fabrication Methodology of silver electrodes by DLW; b) temperature sensor on both paper and PEN substrates; c) Flexible PCB based on a 555-timer fabricated through DLW.
Figure 6. Schematic representation of the w-cLIG-MSC fabrication (doi.org/10.1088/2058-8585/ac8e7).
- Sustainable carbon sources for green LIG electronics, sensors (DOI10.1063/5.0100785; ) and supercapacitor (DOI: 10.1007/s00604-022-05610-0)
- Solution based Non-Volatile Memories (NVM) using 2 different approaches: A) combustion synthesis combined with LDW an B) hydrothermal combined with LDW for nanoparticles. See DOI10.1039/d0tc05368f
Figure 7. IV sweep characteristic of Pt/ZTO/Ti/Au devices setting in the forward polarity for 100 switching cycles. Se doi.org/10.1002/aelm.201900958)
- Integration of Electrolyte-gated transistors (EGTs) with ECD, partially accomplished, due to termination of the project in month 48. The ZTO ECGT was processed by screen printing, using nanopaper composite gated transistors (NCGT), showing all the viability of the concept proposed. See doi.org/10.1002/adsu.202200177
Figure-8. Dynamic electrical characterization of the fabricated fully screen-printed ZnO NCGTs. Please see doi.org/10.1002/adsu.202200177.
Figure 9- Mechanical electrical stress measurements of the fully screen-printed ZnO NCGTs on the flat state after consecutive 100 outward folding/unfolding cycles. See doi.org/10.1002/adsu.202200177.
- Establishment of processes to fabricate electronics circuits via LIG, such as of electrodes, sensing resistive elements and the possibility to control the conductance of the material. That is, the possibility to establish a channel layer modulated via a gate electrode and so active devices such as transistors. Moreover, the control of the depth penetration allows us to change the material performances not only on the surface (2D) but along its bulk (3D). This is one of the most outstanding results achieved.
