黑料福利网

Spectrometers collect light, break it apart, and tease valuable information from it. Here, 鈥渓ight鈥� could be the visible light our eyes detect or invisible electromagnetic waves like infrared radiation, which is used in optical communications and also produced by chemical reactions in crops and in stars like our Sun.

黑料福利网 researchers , , and Andrea Fiore know a thing or two about collecting light and analyzing it with spectrometers. Back in 2017, they co-authored a that proposed a way to build a micro-spectrometer that could fit in a smartphone, research that caught the eye of the .

鈥淭he response to the micro-spectrometer work was extraordinary,鈥� recalls Andrea Fiore, professor in the Department of Applied Physics. 鈥淭o see it featured in de Volkskrant was a major vindication for our work to say the least!鈥�

Petruzzella 鈥� formerly a researcher in the department of Applied Physics and now CEO of MantiSpectra 鈥� also has fond memories of that paper: 鈥淲e saw the potential, and the wider public saw the potential. But we knew we needed to change the technological approach for it to be truly suitable for everyday application. We needed something that was much simpler and more robust.鈥�

And so, began the journey towards the 黑料福利网 spin-off company .

From postdoctoral beginnings

After completing his PhD cum laude in 2017, Petruzzella moved into the world of postdoctoral research with a focus on the design and fabrication of spectral sensors to analyze light from various sources.

鈥淲hat we have now with MantiSpectra comes from the efforts of our research team during my postdoctoral endeavors,鈥� says Petruzzella.

But while MantiSpectra has evolved from fundamental research, it still took some time before the research led to technologies that could be used in society. 鈥淚t wasn鈥檛 like we had picked out the company name before we started,鈥� explains Petruzzella. 鈥淚t鈥檚 been an organic process, and MantiSpectra has been an organic outcome.鈥�

MantiSpectra is seeking to advance technologies in the field of miniaturized and portable spectroscopy, in particular by advancing a spectral sensing chip inspired by research from Fiore鈥檚 group. 鈥淚t鈥檚 interesting when I think back to the start. We had this new technology, but we didn鈥檛 have a particular application in mind,鈥� notes Fiore. 鈥淲hen we started to better understand the potential applications in the agri-food and pharmaceutical industries, it became clear what was really needed to make a simple, yet useful sensor.鈥�

What鈥檚 in a name?

So where does the name MantiSpectra come from? Well, there鈥檚 an interesting animal kingdom link to the field of spectral sensing as Maurangelo Petruzzella explains.

鈥淭he retina of the human eye is home to photoreceptor cells that detect light. There are two types, rods for dim light conditions and cones for bright light. We have three different cone cells, each sensitive to different wavelengths of light 鈥� red, green, and blue. But the Mantis shrimp easily trumps the human eye as its eyes can have up to sixteen different photoreceptor cells, with each one sensitive to a different wavelength of light between ultraviolet and infrared.鈥�

It鈥檚 the replication of this 鈥榮uper-vision鈥� of the Mantis shrimp that forms the basis of MantiSpectra鈥檚 technologies, hence the name that honors the sea-dwelling creature. 鈥淥bviously we鈥檙e not trying to replicate the eye of the Mantis shrimp, but our sensors use a similar principle of measuring different parts of the spectrum using different receptors,鈥� says Petruzzella

Organic applications

MantiSpectra are specifically interested in the range of wavelengths in the near-infrared (IR) part of the electromagnetic spectrum, between 900 and 1,700 nm. 鈥淭his range of wavelengths is of particular interest for spectral sensing applications involving organic materials. This range of wavelengths is associated with absorption bands in chemical bonds like O-H (oxygen-hydrogen), C-H (carbon-hydrogen), and N-H (nitrogen-hydrogen),鈥� says Petruzzella.

鈥淭he visible spectrum provides some information but measuring at near-infrared wavelengths gives far more information for many important problems, and this can be used to better characterize organic and inorganic substances in agri-food and healthcare,鈥� adds Fiore.

MantiSpectra鈥檚 approximation of the Mantis shrimp鈥檚 eye is a chip, roughly 1 millimeter by 1 millimeter, that鈥檚 home to sixteen electronic photoreceptors or pixels, each sensitive to a different range of wavelengths in the near-IR. Despite its tiny size, the chip鈥檚 sensors open up a world of possibilities, particularly when it comes to monitoring the freshness of fruit and vegetables before harvesting.

When is the right time to harvest?

鈥淚dentifying the best time to harvest fruit and vegetables can be difficult for farmers. They can rely on years of experience and go with instinct, but things can go wrong. If picked too early, the produce may not have reached its maximum taste, if picked too late then the produce may be spoilt. Our sensor could really help farmers in the future,鈥� says Petruzzella.

Sometimes fruits or vegetables may not look like they are ready to be harvested, but a giveaway indicator of their ripeness can be found at near-IR wavelengths. 鈥淥ur eyes might not be able to see these wavelengths, but they can be measured with our pixel sensor,鈥� says Fiore.

It鈥檚 this hidden data that MantiSpectra鈥檚 chip exploits, but before the system can give a proper recommendation as to when is a good time to harvest, the system needs to be trained using machine learning approaches.

鈥淏efore using the chip in fields, it must be calibrated. The data collected by the chip is analyzed with an algorithm, but this algorithm needs to be trained, and that鈥檚 where machine learning comes into play,鈥� points out Petruzzella. 鈥淲e use a training data set that comes from a crop of interest. Different products, or in some cases different varieties of a product, may need separate training 鈥� this is what we are testing for the different application cases鈥�. The same approach can be used to train the sensor system to classify different types of plastics or fabrics, which has great potential applications for recycling.

Exciting adventures to come

It goes without saying that exciting times lie ahead for MantiSpectra, and 2021 promises to be an adventure for the startup, founded in October by Petruzzella, Fiore, their colleague Francesco Pagliano, and 黑料福利网 Holding. Things started fantastically in 2021 when MantiSpectra was mentioned by name in one of the year鈥檚 first .

In addition, MantiSpectra has received considerable support from PhotonDelta, as well as from Innovation Industries, NWO, and the Metropolitan Region Eindhoven. And the MantiSpectra team is growing, with several additions to the MantiSpectra team.

鈥淲e are only at the beginning, but we know that there is so much potential for this technology, whether it鈥檚 monitoring crops, classifying materials for recycling, or checking on the chemical composition of drugs. The future promises to be exciting,鈥� says Petruzzella.

Andrea Fiore also echoes the enthusiasm of Maurangelo Petruzzella: 鈥淚n the early phases of the technology, we were looking for an application. Now we are spoilt for choice, it鈥檚 hard not to be enthusiastic.鈥�

From initial research at 黑料福利网, MantiSpectra was born, and looks set to play a key role in the utilization of spectral sensing technologies in our daily lives. They are only at the start, but MantiSpectra鈥檚 super-vision technologies will help us to see things that we would otherwise miss completely.

The superpower of near-IR vision has arrived!

Find out more about MantiSpectra in .