Inkjet Printing of Conductive Nanoparticle Inks for Flexible Electronics
Summary
Inkjet printing of conductive nanoparticle inks has emerged as a cornerstone technology for manufacturing lightweight, low-cost and large-area flexible electronic devices. By ejecting ultrafine droplets of metal nanoparticle dispersions onto polymeric or paper substrates, complex conductive patterns can be realised without masks or etching. Key advantages include minimal material waste, direct digital patterning and compatibility with roll-to-roll processing. Challenges centre on formulation of stable, high-metal-loading inks; control of droplet rheology and wetting on diverse substrates; and post-deposition sintering to achieve metallic conductivity at temperatures compatible with temperature-sensitive supports. Recent advances in ligand chemistry, photonic and laser-induced sintering, and hybrid ink designs have addressed oxidation of copper and gold nanoparticles, reduced sintering energy requirements and improved adhesion and mechanical durability under bending. These developments have paved the way for flexible sensors, wearable health monitors, radio frequency identification tags and deformable display backplanes. Continued progress in understanding the interplay among ink composition, printing parameters and sintering modalities is driving the global adoption of inkjet-printed conductive networks in consumer electronics, biomedical devices and the Internet of Things.
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Inkjet Printing of Conductive Nanoparticle Inks for Flexible Electronics publication trend
The graph below shows the total number of articles in inkjet printing of conductive nanoparticle inks for flexible electronics across all publications each year (not limited to Nature Index journals).
Technical terms
Nanoparticle ink: A colloidal dispersion of metallic nanoparticles in a solvent, stabilised by surface ligands for inkjet deposition.
Sintering: A post-printing process, often thermal or photonic, that coalesces nanoparticles into continuous conductive films.
Ligand: An organic molecule attached to nanoparticle surfaces to prevent aggregation and control ink stability and sintering behaviour.
Photonic sintering: Rapid consolidation of printed nanoparticles using intense light pulses or lasers to achieve conductivity at low substrate temperatures.
References
- Laser sintering of Cu particle-free inks for high-performance printed electronics. npj Flexible Electronics (2025).
- On‐Demand Sintering of Gold Nanoparticles via Controlled Removal of o‐Nitrobenzyl Thiol Ligands Under Record‐Low Power for Conductive Patterns. Advanced Science (2025).
- Surface and Interface Designs in Copper-Based Conductive Inks for Printed/Flexible Electronics. Nanomaterials (2020).
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