Nanosensors — small, but mighty.

Importance of Nanosensors

A graphene-based nanosensor detects unhealthy pollutants in the air. The sensor detects changes in electrical resistance which identified that pollutants were present. Credit: University of Southampton

FUN FACT! Nanosensors have been found useful during the 2008 Beijing Summer Olympic Games for assessing air pollution.

Air pollution can be measured with the help of nanosensors. Credit: Nanowerk
Illustration of the Au-TA-DNS being aggravated by lead and copper ions, demonstrating how the paper will change colour if it detects those ions. Credit: Royal Society of Chemistry
Potential uses of nanotechnology and nanosensors in agriculture include A) increasing productivity using nanopesticides and nanofertilizers, B) improving the quality of soil with hydrogels and nanozeolites, C) stimulating plant growth with nanomaterials, and D) efficiently monitoring plants using nanosensors. Credit: Frontiers in Environmental Science

How do nanosensors work?

How are nanosensors built?

Top-Down

Michelangelo sculpted his sculptures using the top-down approach.

Bottom-Up

This animation shows how a ‘nanofactory’ would look like. It uses the bottom-up approach by assembling and sorting certain molecules together to create a computer like none other. This factory could create virtually anything in the world! But, it doesn’t exist yet 😞 Credit: Nanorex Inc.

Nanofabrication isn’t perfect.

Improving Nanofabrication

Why can’t we use regular-sized sensors instead?

Quick Recap

Further Reading + Sources

--

--

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store