When it comes to testing for cancer, environmental pollution and food contaminants, traditional sensors can help. The challenges are that they often are bulky, expensive, non-intuitive and complicated. Now, one team reports in ACS Sensors that portable pressure-based detectors coupled with smartphone software could provide a simpler, more affordable alternative while still maintaining sensitivity.
Current disease and contamination sensors require expensive readout equipment or trained personnel. Yuehe Lin, Yong Tang and colleagues propose a new detection system based on pressure changes. For example, when a disease biomarker is present, it causes a chain reaction in the device that results in oxygen being released and pressure building. The pressure changes are measured by a portable barometer, and smartphone software provides an easy readout of the results.
To show the versatility of the pressure sensor, the team tested a variety of applications. Prototypes could detect carcinoembryonic antigen, a protein present in high levels in patients with colon or rectal cancer; ractopamine, which is an animal-feed additive banned in many countries; and thrombin, a cardiovascular disease marker. In addition, a mercury-ion sensor was developed for environmental pollution monitoring. The researchers say that because the results are immediately available with a smartphone, the method could enable real-time monitoring of environmental pollution, disease outbreaks and food safety.
The Latest on: Portable pressure-based detectors
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on June 21, 2017 at 7:51 am
environmental pollution and food contaminants, traditional sensors can help. The challenges are that they often are bulky, expensive, non-intuitive and complicated. Now, one team reports in ACS Sensors that portable pressure-based detectors coupled with ... […]
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On the other hand, what users actually get is a simpler, somewhat limited virtual reality experience called mobile VR, albeit in a easily portable device ... collected blood samples using a similar pressure-based technology. At Columbia University in ... […]
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The touchpad company has been in business for a long time, and survived the transition from cruder, simpler pressure-based input mechanisms to the ... offering that incorporates per-finger pressure detection into the mix for even greater sensitivity. […]
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including portable devices and large home appliances (refrigerators, washing machines, etc.) that require high-resolution pressure detection. Note 1 Absolute pressure detection: Detects barometric and other types of pressure based on a vacuum state (zero ... […]
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