3D-printed microfluidic components

Microfluidics enables precise control of minute fluid volumes and underpins applications in biomedical research, drug development, and materials science. In medical and biofabrication contexts, microfluidics is central to lab-on-a-chip and organ-on-a-chip platforms as well as point-of-care diagnostics, where precise control over fluid dynamics and cell-material interactions is critical. 

While many microfluidic devices are fabricated using planar or multilayer processes, advanced functionalities – such as 3D flow manipulation, in-channel mixing elements, integrated micro-optics, or engineered cell microenvironments – require complex 3D geometries with high surface quality and accurate spatial placement. Achieving this level of complexity using traditional methods can be technically demanding and restrictive.

Nanoscribe’s Two-Photon Polymerization (2PP) technology overcomes these limitations. With submicron precision, excellent surface quality, and aligned 3D printing directly inside microfluidic channels or on prefabricated substrates, 2PP enables the seamless integration of functional 3D microstructures, unlocking new design possibilities for next-generation microfluidic devices. 

3D microprinting beyond planar microfluidic designs

Nanoscribe’s Quantum X systems enable the fabrication of complex microfluidic components and systems with new functional 3D geometries. Leveraging Nanoscribe’s proprietary Dip-in Laser Lithography (DiLL) combined with automated alignment, functional 3D microstructures can be fabricated even inside deep and narrow microfluidic channels, including micronozzles, microvalves, micromixers, optofluidic elements, and extracellular microenvironments.

Using 3D printing by Two-Photon Grayscale Lithography (2GL®), microfluidic structures can be fabricated with precisely tailored surface properties, ranging from smooth topographies for precise flow control to defined roughness levels for enhanced cell adhesion.

The specific application advantages of Quantum X systems in detail:

• High throughput without compromising quality: 2GL® enables fast printing of 3D objects at high quality across scales from nano- to mesoscale, including high-aspect-ratio elements, micronozzles, microvalves, and filigree lattice structures.

• Automatic alignment: High-precision alignment enables direct printing onto prepatterned substrates relative to fiducials and within commercial or custom microfluidic chips and wells.

• Software-supported alignment workflow: nanoPrintX provides a tree-like organization of alignment routines and print objects. A graphical user interface (GUI) visualizes structure placement, enabling efficient preparation of even complex print projects.

• Wide mechanical property range: Nanoscribe’s photoresins span Young’s moduli from MPa to GPa, supporting both soft, elastic structures and stiff microfeatures.

• 3D printing inside deep channels: Dip-in Laser Lithography enables complex 3D geometries inside deep and narrow microfluidic channels, with working distances exceeding 300 µm at submicron precision and over 2 mm at micrometer precision.

• Tailored surface topographies: Nanoscribe’s patented 2GL® technology enables direct surface structuring during printing, ranging from ultra-smooth finishes to functional textures using more than 4,000 gray levels.

• Microfluidic template fabrication: 3D-printed polymer structures can serve as masters for PDMS molding or electroplating, supporting rapid prototyping, functional validation, and scalable replication of microfluidic devices.