With this advancement, hydrogen annealing could pave the way for more efficient, sustainable solar energy solutions, bringing affordable green energy closer to reality.

The annealing process reshapes the Cu NWs ... As a result of these improvements, the sensor can detect hydrogen concentrations as low as 5 parts per billion (ppb), much lower than previous CuO ...

The annealing process reshaped the nanowires ... the sensor demonstrated remarkable sensitivity, detecting hydrogen concentrations as low as 5 parts per billion (ppb)—a substantial improvement ...