A research team from the Swiss Federal Laboratories for Materials Science and Technology (Empa) and the federal technology institute ETH Zurich has now applied for a patent for the process, Empa said on Tuesday.
In principle, soldering wounds using the new method works in the same way as soldering two metals: a solder is required which melts at a low temperature and can be used to bond the two parts together.
In the case of metals, a metal mixture with copper is usually used. In this case, the researchers developed a protein gelatine paste that serves as a solder for soldering fabrics.
The paste contains two types of nanoparticles: firstly, so-called titanium nitride nanoparticles, which convert light into heat – when the paste is irradiated with a laser, it heats up. Secondly, bismuth vanadate particles, which act as a kind of thermometer; according to Empa, they emit light of a specific wavelength depending on the temperature and thus enable precise temperature control in real time.
In laboratory tests with various tissue samples – for example, on organs such as the pancreas or liver – the researchers achieved rapid, stable bonding of wounds. The sealing of tissue on the urethra, fallopian tube or intestine was equally successful. The results of the study were published in the journal Small Methods.
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