In this reaction, we are going to use sulfuric acid and copper(II) oxide. This time there will be no gas produced. However, there will be other evidence that a chemical reaction is taking place.

In air, oxygen molecules attach to the surface of the CuO NWs, forming oxygen ions (O 2 ⁻, O ... the fabricated copper (Cu) NWs have low crystallinity and form a Cu oxide layer on the ...