Printed electronics are attracting a great deal of attention in both research and commercialisation as they enable the fabrication of large-scale, low-cost electronic devices on flexible substrates. Printed electronics play a critical role in facilitating widespread flexible electronics and, more recently, stretchable electronics.

Conductive nanomaterials, such as metal nanoparticles and nanowires, carbon nanotubes, and graphene, are promising building blocks for printed electronics. Nanomaterial-based printing technologies, formulation of printable inks, post-printing treatment, and integration of functional devices have progressed substantially in recent years.

This aim of this Special Issue is to collate research on the basic principles of and recent developments in common printing technologies, formulation of printable inks based on conductive nanomaterials, deposition of conductive inks via different printing techniques, and performance enhancement by using various sintering methods. Review articles are also welcomed, including conductive nanomaterials, printing techniques and ink formulations applied to other materials such as semiconducting and insulating nanomaterials. Moreover, printed flexible and stretchable electronic devices are highly encouraged to illustrate the potential of their applications.

Potential topics include but are not limited to the following:

• Inkjet printing, printing technologies, formulation of printable inks, post-printing and integration techniques
• Printable metal nanoparticles and nanowires, carbon nanotubes, graphene, and other 2D materials
• Flexographic printing, roll-to-roll printing, electrohydrodynamic printing, screen printing and gravure printing
• Photonic sintering, plasma sintering, electrical sintering, microwave sintering, chemically sintering
• Printed electrodes, printed solar cells, transparent film heaters, printed thin-film transistors, radio-frequency identification (RFID) and sensors
• Nano-printing and packaging, flexible substrates, conductive and nonconductive adhesives, printed antennas for wireless power and communications
• Printed triboelectric nanogenerators, printed LEDs and QLEDs, wearable health monitoring: electrocardiogram (ECG), and photoplethysmogram (PPG) sensors