Cytosurge’s FluidFM µ3Dprinter: Revolutionizing Direct Metal Printing with Submicron Precision

In the rapidly evolving landscape of advanced manufacturing, the direct 3D printing of metals with submicron resolution stands out as a truly groundbreaking additive manufacturing technique. This innovative approach holds immense promise across an extensive range of industrial and scientific sectors, offering unparalleled precision for creating microscopic metallic structures. Leading this technological charge is Cytosurge AG, a high-tech pioneer that has introduced the world to the FluidFM µ3Dprinter. This remarkable system is not only the first of its kind to achieve such extraordinary resolution in direct metal printing, but it also delivers impressive scalability, presenting compelling prospects for both reduced production costs and increased operational speed. Operating a new dedicated business unit for 3D printing at ETH Zurich, Cytosurge is at the forefront of this revolution. To delve deeper into the capabilities of Cytosurge and their transformative FluidFM technology, we recently sat down with Edgar Hepp, Cytosurge’s insightful Business Developer.

Cytosurge: Pioneering Nanotechnology and Micro-Manufacturing

Cytosurge emerged several years ago as an ambitious high-tech spin-off from ETH Zurich, a globally renowned university celebrated for its excellence in science, technology, engineering, and mathematics (STEM). Our core team comprises a diverse and passionate group of specialists, whose expertise spans a broad spectrum of disciplines, including business strategy, advanced engineering, intricate biology, and complex computer science. Together, we have successfully developed, refined, and commercialized the groundbreaking FluidFM technology.

This versatile technology unlocks an immense array of applications across various scientific domains, from fundamental biological research and cutting-edge medical diagnostics to complex physics experiments and material science breakthroughs. At Cytosurge, our unwavering mission is to equip researchers and industries with state-of-the-art tools that enable entirely new possibilities and applications, pushing the boundaries at the very forefront of nanotechnology. Our primary focus areas for impact include precision medicine, advanced life sciences, and innovative material science, where the ability to manipulate and create structures at the nanoscale is paramount.

The FluidFM µ3Dprinter represents a significant and exciting new development, building upon the robust foundation of our proprietary FluidFM core technology. However, it ventures into a completely distinct and highly specialized application space: the direct printing of metals on a micrometer and even sub-micrometer scale. This innovative step broadens the horizons of what is achievable in additive manufacturing, moving beyond conventional limitations to offer unprecedented control and precision.

The FluidFM µ3Dprinter: Unveiling Submicron Precision

How FluidFM µ3Dprinter Technology Works

The advanced FluidFM µ3Dprinter ingeniously integrates two sophisticated techniques: fluidic scanning probe microscopy and cutting-edge 3D printing methodologies. At its heart, the system employs highly sensitive pipettes, meticulously engineered and branded as FluidFM iontips. These specialized iontips feature intricate, closed microscopic channels designed for the extraordinarily precise dispensing of femtoliters of liquid into a three-dimensional space. This level of volumetric control, reaching femtoliters (quadrillionths of a liter), is critical for achieving the printer’s unprecedented submicron resolution.

As visually depicted in Figure 1, the micropipette meticulously delivers a liquid solution containing metal ions to the precise printing location. Once dispensed, these metal ions undergo an extremely rapid electrolytic process, which facilitates their swift deposition as solid atoms. This electrochemical reaction is the core mechanism enabling the direct formation of metallic structures layer by layer, with exceptional material integrity and minimal thermal stress, a common challenge in other metal additive manufacturing techniques.

The FluidFM iontips are distinguished by their incredibly small aperture size, which measures merely a few hundreds of a nanometer. To put this into perspective, this opening is approximately 200 times smaller than the average diameter of a human hair. This dramatically reduced size is what enables the system to achieve astonishingly low flow rates, reaching femtoliters per second. Such minute flow rates are a million times smaller than what even the most sensitive conventional flow sensors are capable of detecting, underscoring the revolutionary precision embedded within FluidFM technology.

Furthermore, the printing process benefits from highly sophisticated real-time monitoring. A precisely calibrated laser beam continuously tracks the motion of the cantilevered micropipette, as illustrated in Figure 2. This cantilever is so exquisitely sensitive that it can be triggered by forces as minute as piconewtons. This extraordinary level of sensitivity allows for constant force feedback monitoring during the 3D printing process, enabling truly in situ adjustments and ensuring unparalleled accuracy and reliability in layer deposition and structural integrity. This closed-loop control system is vital for fabricating complex geometries with high fidelity.

Currently, the FluidFM µ3Dprinter offers the capability to print with a selection of crucial metals, including highly conductive copper, lustrous silver, and precious gold. These materials are chosen for their excellent electrical and thermal properties, making them ideal for a variety of high-performance applications in microelectronics and beyond.

What Makes the FluidFM µ3Dprinter Special?

The FluidFM technology is not just an incremental improvement; it fundamentally redefines the possibilities of metal object manufacturing. It ushers in a new era, opening doors to unprecedented research and development opportunities across a multitude of critical fields. These include the intricate realm of microelectronics, the high-demand sector of semiconductors, innovative surface modification techniques, the burgeoning field of microbots, advanced sensor development, and foundational material science, among many others. The ability to directly print intricate metallic structures at the micro- and submicron scale provides researchers and engineers with a tool previously unimaginable, enabling the creation of novel designs and functionalities.

Ease of use and operational efficiency are hallmarks of the FluidFM µ3Dprinter. It features a remarkably simple and intuitive operating interface, designed to make sophisticated micro-3D printing accessible to a broad user base. This user-friendly software, coupled with our thoughtfully designed functional instrument (as showcased in Figure 3), ensures that the FluidFM technology is not only powerful but also easy to integrate into existing workflows and ready for immediate application in diverse research and production scenarios. The combination of high performance and ease of operation significantly reduces the barrier to entry for advanced microfabrication.

The FluidFM µ3Dprinter empowers direct printing of highly complex 3D metal objects, not merely simple geometries, at the micrometer scale with exceptional fidelity. Utilizing a sophisticated voxel-based printing process, the system can accept and accurately reproduce virtually any design, no matter how intricate. This includes challenging architectural features such as overhanging structures and precise 90° angles, which are often problematic for other additive manufacturing methods. Furthermore, the µ3Dprinter’s high-precision surface modification and deposition capabilities allow for the creation of ultra-thin layers or complex structured objects by precisely depositing various metals onto a target surface. This opens avenues for custom circuit integration, enhanced sensor surfaces, and advanced metamaterials.

The Future of 3D Metal Printing: A Vision from Cytosurge

Looking ahead, we observe a pervasive and accelerating trend towards the miniaturization of components across nearly every industry. Concurrently, there is a growing demand for highly customized mass production, alongside an urgent need to drastically reduce development and production cycles to meet rapid market demands. These powerful forces collectively create an exceptionally favorable environment for our cutting-edge 3D micro-printing technology to thrive and expand.

Our new and innovative technology offers a multitude of possibilities that span the entire spectrum from initial concept to large-scale production. It empowers the creation of bespoke custom designs with unprecedented detail, facilitates rapid prototyping for quick iteration and validation, and scales efficiently for both batch production and high-volume manufacturing. The arrival of our newly developed micro metal 3D printing technology is perfectly timed, aligning precisely with the current landscape of an accelerated, technology-driven marketplace. In such an environment, possessing the right tools—tools that offer precision, speed, and versatility—is not merely advantageous, but absolutely essential to maintain momentum, drive innovation, and continue moving forward at the pace demanded by modern industry.

Cytosurge’s Future Innovations and Expanding Material Palette

One of the most significant advantages of our FluidFM µ3Dprinter is its ability to directly print the smallest objects from a solution, entirely eliminating the need for a pre-designed template. This free printing process means designers and engineers are unbound by traditional constraints, able to innovate with unprecedented freedom. Furthermore, the technology uniquely does not require any post-treatment or curing steps, which drastically simplifies the manufacturing workflow, reduces processing time, and lowers overall production costs. This streamlined approach delivers finished, functional metal parts directly from the printer bed.

As highlighted earlier, the FluidFM µ3Dprinter is already proficient in printing with essential metals such as copper, silver, and gold. These materials are crucial for a variety of existing and emerging applications due to their conductivity and chemical properties. For the foreseeable future, our research and development teams are actively investigating the exciting possibilities of expanding our material palette. We are currently exploring the printing capabilities with various aqueous ions, including Cadmium (Cd), Chromium (Cr), Iron (Fe), Indium (In), Zinc (Zn), and Platinum (Pt). Successfully integrating these metals would unlock a vast new range of applications, from advanced catalysis and corrosion-resistant coatings to specialized biomedical implants and high-performance electronic components.

We confidently assert that there is currently no other technology available that is capable of printing metal in such a direct, precise, and efficient manner. The FluidFM µ3Dprinter truly sets a new benchmark for additive manufacturing at the micro- and nanoscale, delivering finished metallic structures with minimal fuss and maximum accuracy.

Concluding Thoughts: Stepping into a New Era of Manufacturing

The FluidFM µ3Dprinter offers a compelling gateway into an entirely new and exciting field of technology, characterized by unparalleled precision and the inherent scalability of its process. Through our machines’ excellent prospects regarding both production costs and operational speed, this technology is poised to enable the emergence and expansion of entirely new application fields that were previously unattainable. The ability to create complex metallic micro-structures efficiently and affordably will undoubtedly foster innovation across multiple industries, from personalized medicine to next-generation electronics.

It is therefore crucial to closely monitor the advancements of this groundbreaking technology. To stay informed and witness the remarkable innovations we continue to create, we encourage everyone to follow Cytosurge on our social media channels, specifically Twitter and LinkedIn! Join us on this journey as we push the boundaries of what’s possible in additive manufacturing.

For more comprehensive information about Cytosurge and their transformative FluidFM technology, we invite you to explore their official website, accessible here. Discover the full range of their innovations and how they are shaping the future of micro- and nano-scale fabrication.

Do you believe that Cytosurge’s FluidFM µ3Dprinter will fundamentally revolutionize the manufacturing of microscopic metal parts and pave the way for entirely new applications? We encourage you to share your valuable opinions and insights below in a comment or join the discussion on our Facebook and Twitter pages! Your feedback helps drive the conversation forward in this exciting field.