Masoud Mahjouri-Samani | NanoPrintek: What are the exact physics behind dry, maskless nanoparticle generation and material isolation?

Why are we still spending years formulating colloidal inks when we can print directly from solid metals?

Traditional printed electronics relies on complex chemical inks containing polymers and additives that cause trace contamination, limiting performance in sensitive applications like batteries, sensors, and semiconductors. NanoPrintek bypasses this bottleneck entirely through an in-situ gas-phase synthesis approach, starting from a pure bulk solid target instead of wet chemicals.

The system uses a primary laser to ablate the solid target, generating ultra-pure, dry nanoparticles (3 to 30 nm) in real time inside a carrier gas. These pristine nanoparticles are jetted through a nozzle, while a secondary, co-axial centering laser instantly fuses them onto the substrate at the point of deposition.

This single-step, dry additive process collapses the complex ink supply chain—from powder synthesis to dispersing agents and post-deposition thermal ovens—into a unified, real-time, on-demand printing cycle. By executing synthesis, deposition, and sintering simultaneously, it delivers high-purity functional traces with zero liquid phase hazards.

In this short video, you can learn:
* How laser ablation replaces wet chemical ink formulation for printed electronics
* The dual-laser system mechanism that synthesizes and sinters nanoparticles in real-time
* How removing polymers and additives yields ultra-pure metallic traces on demand

📋 **Clip Abstract** This video details a novel dual-laser printing technology that eliminates the need for colloidal inks by generating nanoparticles directly from solid targets in real-time. By combining in-situ ablation and laser sintering, this process prints highly pure electronic traces without the chemical additives that typically degrade device performance.

How can you sinter highly conductive copper onto paper and heat-sensitive FR4 without burning the substrate?

Sintering copper typically requires high thermal budgets that easily destroy low-cost substrates like paper, polymers, or standard FR4. By shifting to dry, ultra-pure nanoparticles in the 3 to 5 nanometer range, the melting point of the metal is drastically depressed due to thermodynamic scale effects.

This thermodynamic behavior allows a localized laser to sinter the pure copper nanoparticles directly on the surface of FR4 or raw notebook paper without transferring damaging heat to the underlying substrate. This dry deposition system completely eliminates the liquid interface, preventing the swelling or degradation associated with solvent-based inks.

As a result, highly conductive metallic traces can be cleanly deposited onto highly sensitive, biodegradable, or water-soluble substrates. This capability opens up new avenues for transient electronics, green sensors, and flexible devices that must be easily dissolved or recycled after their operational lifecycle.

In this short video, you can learn:
* How nanoparticle size effects lower the sintering temperature of copper for sensitive substrates
* The thermal management strategy for printing conductive metals on FR4 and paper without damage
* The potential of dry printing for fabricating transient, biodegradable, and water-soluble electronics

📋 **Clip Abstract** This video demonstrates how thermodynamic size effects of 3-5 nm copper nanoparticles enable low-temperature laser sintering on delicate materials like FR4 and paper. By removing solvent interfaces, this dry printing method permits the direct deposition of high-conductivity circuits on biodegradable and flexible substrates.

Is the $200,000 per liter cost of specialized functional inks killing your hardware R&D cycle?

Wet-chemical ink synthesis for exotic materials like platinum or palladium presents a massive commercial barrier, often requiring years of R&D and costing hundreds of thousands of dollars per liter. In contrast, utilizing solid targets directly allows researchers to use standard bulk materials, bringing material costs down to a fraction of traditional liquid ink formulations.

Because the process relies on laser-driven physical vapor generation from solid precursors, the machine can host up to six targets simultaneously. This enables immediate switching between different elements or the creation of customized, in-situ alloys, composites, and hybrid structures directly during the deposition process.

This approach effectively makes the entire periodic table printable on demand without modifying the carrier gas or fluid dynamics of the system. Scientists can transition from printing pure transition metals to complex oxides simply by changing the target material, completely bypassing shelf-life and nozzle-clogging limitations.

In this short video, you can learn:
* The dramatic cost and time differences between using bulk target materials and proprietary chemical inks
* How to print custom alloys and multi-material composites in real-time using a multi-target setup
* How this dry physical deposition approach makes the entire periodic table printable on demand

📋 **Clip Abstract** This segment examines the massive economic advantages of using bulk solid targets rather than expensive, low-shelf-life chemical inks. It showcases how a multi-target laser printer can seamlessly transition between different metals and ceramics, offering unprecedented material flexibility for device fabrication.