This was from July of 2020 so forgive if it’s already made it here. I was researching some other nano companies to invest in and found this.

5. Nanotechnology uses: Energy

Nanotechnology applications in the energy sector include uses in both energy storage and in the recovery of oil and gas. For example, PyroGenesis Canada (TSXV:PYR,OTCQB:PYRNF) uses its plasma-based tools and processes to help oil and gas companies advance greener and more efficient recovery operations. Its plasma processes are also used by the US Department of Defense and by the additive manufacturing/3D printing industries.

Nanotechnology is also used in the renewable energy sector, which includes enhancing solar cells. Oak Ridge National Laboratory has created microscopic zinc oxide cones, known as nanocones, that can increase energy efficiency in each solar cell.

https://investingnews.com/daily/tech-investing/nanoscience-investing/nanotech-investing/nanotechnology-uses/