sensor
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Physics
Building a better infrared sensor: New photodiode design improves responsiveness
New, more sensitive infrared sensors can benefit a variety of technologies. Credit: Aalto University/Xiaolong Liu Infrared detection is important in a wide range of technologies, from remote controls to autofocus systems to self-driving cars and virtual reality headsets. This means there are significant benefits to be gained by improving the efficiency of infrared sensors such as photodiodes. Researchers at Aalto…
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Nanotechnology
New “all-optical” nanoscale force sensor accesses previously inaccessible environments
Illustration of atomic arrangement within a single lanthanide-doped nanocrystal. Each lanthanide ion can emit light. Credit: Andrew Mueller/Columbia Engineering Mechanical forces are an essential feature of many physical and biological processes. Telemetry of mechanical signals with high sensitivity and spatial resolution is required for a wide range of applications, from robotics to cell biophysics and medicine, and even space travel.…
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Chemistry
A small sensor that detects toxic gases shows promising results in the lab
a) Schematic diagram of the doping strategy utilizing N2H4 during the hydrothermal synthesis procedure. b) XRD patterns and c) Raman spectra of all three MoS2 showing crystal structures. Credit: Advanced Science (2024). DOI: 10.1002/advs.202410825 A team of scientists at UNSW Sydney has developed a small, highly sensitive sensor that can detect low concentrations of the toxic gas nitrogen dioxide (NO2).…
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Nanotechnology
Expanded color gamut with fast-response colorimetric sensor for real-time monitoring
The proposed sensor design incorporates a porous germanium layer (Pr-Ge) that significantly improves the color representation and a nanohole array that increases the responsiveness of the sensor. Credit: Busan University Associate Professor Gil Ju Lee Colorimetric sensors detect changes in the environment by intuitively changing colors, easily visible to the naked eye without the need for additional equipment. Moreover, it…
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Science
Paper-based sensor enables rapid cardiac diagnosis in 15 minutes
Deep learning-enhanced paper-based vertical flow assay for sensitive troponin detection using nanoparticle amplification. Credit: Ozcan Lab @UCLA In a significant advance in point-of-care medical diagnostics, a UCLA research team has introduced a deep learning-enhanced paper-based vertical flow assay (VFA) that can detect cardiac troponin I (cTnI) with high sensitivity. This innovative assay has the potential to democratize access to rapid…
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