Study of Single and Multipass f-rGO Inkjet-Printed Structures with Various Concentrations: Electrical and Thermal...

Area of Science:

• Materials Science
• Nanotechnology
• Electrical Engineering

Background:

• Reduced graphene oxide (rGO) is a key graphene derivative for scalable, low-cost conductive inks.
• Inkjet printing offers a precise method for fabricating electronic components with rGO.

Purpose of the Study:

• To evaluate a custom functionalised reduced graphene oxide (f-rGO) ink for inkjet printing.
• To investigate the effect of printing parameters on electrical and thermal properties.

Main Methods:

• Inkjet printing of f-rGO ink on polyimide substrates.
• Electrical characterization using two-point (2P) and four-point (4P) probe measurements.
• Topography analysis via white-light interferometry and thermal characterization.

Main Results:

• The number of printed passes and ink concentration significantly affected electrical resistance.
• Multipass printing allowed for achieving similar resistance with fewer passes compared to higher concentrations.
• Ink properties directly influenced the performance of devices as temperature sensors and heaters.

Conclusions:

• Inkjet-printed f-rGO demonstrates tunable electrical resistance based on printing passes and concentration.
• The study provides guidance for achieving specific resistance values with precision.
• f-rGO inks are suitable for applications requiring integrated temperature sensing and heating functionalities.