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A group of scientists at the Israel Institute of Technology recently developed a new type of flexible sensor using tiny gold particles, which is expected to be integrated into electronic skin. They say that this electronic skin will be more than 10 times more sensitive than the prior art. So what can this skin do? Compared to previous sensors, the sensitivity of the new sensor is greatly increased because it can simultaneously sense three kinds of environmental data.
The existing electronic skin can only perceive the sense of touch - that is, stress, and the technical achievements of this group of scientists can simultaneously sense the touch, humidity and temperature like the real skin. Hossam Haick, the head of the study, said the new electronic skin will be more than 10 times more sensitive than existing technologies.
Hossam Haick said that they have been studying flexible sensors for a long time, but have been suffering from no suitable applications. Flexible sensors, if they are to be widely used, address low-voltage operation (matching the battery in current mobile devices), breadth of pressure measurement, and multi-dimensional measurement problems. In addition, the sensor itself should also have the characteristics of being able to produce quickly and cheaply.
The technology of the Israeli Polytechnic has exactly these qualities. The secret is that they lay a layer of 5-8 nanometer particles on top of the sensor. This layer of particles consists of gold nanoparticles and a peripheral molecule called a "ligand". Haick explains that they are structured like gold nanoparticles or other metal particles as the flower, and "ligand" as the petals.
The team found that when you lay the granules on a layer of PET, the resulting product undergoes a change in conductivity when folded (folding or bending causes some of the nanoparticles to approach, speeding up electrons between them) Pass). This property means that the sensor can detect a wide range of pressures. Dr. Nir Peled of the Israel Medical Center said, "This sensor is very stable and can be mounted on any surface."
By adjusting the thickness and composition of the bottom matrix, scientists can change the sensitivity of the sensor. As a result, the sensor itself can be customized; future possible applications can be used both as a skin on the prosthesis and as a crack in a project such as a bridge.
Dr. Peled said "the biosensing skin developed by Haick and his team will be a breakthrough in bringing nanotechnology to the market."