Detection of bacteria using inkjet-printed enzymatic test strips

Area of Science:

• Nanotechnology
• Analytical Chemistry
• Environmental Science

Background:

• Drinking water contamination poses a significant global health risk, necessitating accessible and affordable diagnostic tools.
• Current detection methods often require expensive instrumentation, limiting their widespread use in resource-limited settings.

Purpose of the Study:

• To develop a low-cost, paper-based diagnostic method for the rapid detection of bacteria in drinking water.
• To demonstrate the efficacy of inkjet printing for fabricating integrated enzyme-nanoparticle sensors on paper substrates.

Main Methods:

• Utilized inkjet printing technology to precisely copattern an enzyme-nanoparticle sensor and a colorimetric substrate onto a paper test strip.
• Developed a visual detection system based on a colorimetric response generated directly on the paper substrate.

Main Results:

• Successfully fabricated integrated enzyme-nanoparticle sensors and substrates on paper test strips using inkjet printing.
• Achieved rapid, visual detection of bacterial contamination through a colorimetric response, eliminating the need for specialized equipment.

Conclusions:

• Inkjet printing offers a viable nanomanufacturing strategy for producing low-cost bacterial detection strips.
• This paper-based sensor technology has the potential to significantly improve access to safe drinking water diagnostics globally.