Start-up uses 3D printing to bring quantum sensor to market maturity

SpinMagIC, a spin-off from the University of Stuttgart, has set itself the goal of revolutionizing the measurement of the shelf life of substances using a portable quantum sensor. Supported by EXIST funding from the Federal Ministry of Economics and Climate Protection, four founders are working on the miniaturization of a system based on electron spin resonance (ESR). The technology, which was previously only available in bulky and expensive devices, is to be reduced to a handy format using a lightweight 3D-printed magnet and a microchip.

The quantum sensor enables the measurement of reactive molecules, so-called free radicals, which influence the shelf life of food, for example. In contrast to conventional ESR devices, which weigh several hundred kilograms and are very expensive, SpinMagIC uses an efficient and cost-effective approach. The 3D-printed magnet weighs just 40 grams and consists of specially simulated ring structures that generate a homogeneous magnetic field. “This approach of 3D-printed structures made of lightweight filament provides a cost-effective way to realize powerful resonant magnets,” emphasizes physicist Belal Alnajjar. “The quantum sensor is already within reach. Now we need to bring it to the market with some serious horsepower,” says Prof. Jens Anders.

The system works by transporting a sample to the sensor via a micropump or by immersing the sensor directly in the substance. An integrated circuit records the quantum signals of the free electrons and outputs the results. The technology has potential for applications in the food industry, pharmaceuticals and environmental monitoring. For example, it could analyze the condition of batteries or measure contamination in water and air.

According to the plan, the sensor is to be made ready for the market within the next two years and pilot customers are to be acquired. “We have a fixed budget from the BMWK for the next two years,” says Chu. Funding for the spin-off is therefore secured for this period. “But after that, we are open to venture capitalists or private investors.” The combination of 3D printing and quantum technology paves the way for innovative applications in a wide range of industries.