Researchers at the California Institute of Nanotechnology said on January 4 that they have successfully developed a biosensor that measures blood sugar levels with a single tear. This technology is achieved by applying an equal area of ​​ink to a 3 nm ultrathin thin film semiconductor. The results of this study were published last month as a globally recognized journal of nanotechnology science papers, ACS NANO.
Since semiconductor-based biosensors have high sensitivity and can be miniaturized, they are considered as next-generation sensors for wearable devices. In order to achieve high sensitivity and fast response, the development of 1D or 2D nanostructures used in research has been actively carried out. However, there are still some technical problems, such as large-scale production of sensors in equipment, as well as simple and fast large-area process technology.
Using the sensor, the team successfully detected changes in blood glucose levels in tears that were more than 10 times lower in blood levels. The structure of this biosensor remains constant after continuous wrinkling and curling and can be attached to the skin and contact lenses.
Researchers say that improving the performance of this biosensor and applying it to wearable devices will greatly facilitate the commercialization of low-cost biosensors. (Text / Yalin translation)
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