De Forest put a metal grid in the middle of the vacuum tube. By using a small input current to change the voltage on the grid, De Forest could control the flow of a second, more powerful current ...

US company Brick It sells the metal grids and thin bricks which fit onto the grids. They're available in different colours and styles. Watch the video to see how they are fitted. Produced by David ...

The novel manufacturing technique was discussed in the study “Enhanced near infrared light trapping in Si solar cells with metal nanowire grid front electrodes,” published in Solar Energy ...