The new sensor's "secret weapon" is that it can detect three types of data at the same time. Dr. Hoxham Hoke, the leader of the research team, said that the current electronic skin can only detect the touch, but their new invention is "the same as the real skin, can simultaneously detect the touch, humidity and temperature," the other , "The sensitivity of the new system is at least 10 times that of the current tactile electronic skin."
Flexible sensor has become a scientific research "incense", but in fact the road is unusually rough. To be widely accepted, flexible sensors must operate at low voltages (so that they can use the batteries in today's portable devices), to measure a wide range of pressures and to make multiple measurements at a time, including humidity, temperature, pressure, and Whether or not there is a chemical substance, etc., and also, it is required that the manufacturing process be fast, convenient and inexpensive.
The latest development of the sensor to meet all the above requirements. The secret is that scientists use gold nanoparticles that are only 5 to 8 nanometers in diameter, surrounded by a linker called a ligand.
The researchers found that when these nanoparticles were placed on top of a pedestal made of flexible polyethylene terephthalate (PET), a material used to make soda bottles, the conductivity of the resulting compound was reduced as the pedestal was bent Changes in the degree of - bending movement will make some particles closer, so that electrons can quickly pass these particles. This electrical nature means that this sensor can detect a wide range of pressures, ranging from tens of milligrams to tens of grams. Neil Peleid, head of the Thoracic Cancer Research and Test Center at the Shiba Medical Center in Israel, did not participate in the study, but said: "The sensor is very stable and can be attached to any surface."
In addition, scientists can change the sensitivity of a sensor by changing the base's thickness and making the material. More importantly, these sensors can be "adapted to the needs of the field," so many different tasks can be performed in the future, including detecting bridge tension and detecting bursts.
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