New sensors could enable more affordable detection of pollution, diseases
- Date:
- June 21, 2017
- Source:
- American Chemical Society
- Summary:
- 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 that portable pressure-based detectors coupled with smartphone software could provide a simpler, more affordable alternative while still maintaining sensitivity.
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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.
Story Source:
Materials provided by American Chemical Society. Note: Content may be edited for style and length.
Journal Reference:
- Qiangqiang Fu, Ze Wu, Dan Du, Chengzhou Zhu, Yuehe Lin, Yong Tang. Versatile Barometer Biosensor Based on Au@Pt Core/Shell Nanoparticle Probe. ACS Sensors, 2017; DOI: 10.1021/acssensors.7b00156
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