As someone wearing the glove formed different letters and phrases in American Sign Language, the hand gestures generated electricity. We would like to harvest energy from every available source,” said Baughman, the corresponding author of the latest article. “We start by pulling a sheet of carbon nanotubes from a vertically aligned array of nanotubes, called a forest,” Wang said. This dramatically improved the capacitance change and the amount of electricity we can harvest from the resulting twistrons.”An improved annealing process also helped boost the output of the twistrons, Wang said. The maximum energy conversion efficiency obtained with the latest twistron version was 7.2 times that of previous twistrons, Baughman said.