21. We also work closely with the universities, especially on basic research like new active materials from plant extracts. 22. In 2014 networks of purified semiconducting carbon nanotubes were used as the active material in p-type thin film transistors. 23. This corrugates the sides of the pockets to provide a spring contact of the pocket with the active material . 24. Secondary batteries are not indefinitely rechargeable due to dissipation of the active materials , loss of electrolyte and internal corrosion. 25. The nanowires were incorporated through a solution-based method that allows the active material to be printed on a substrate. 26. Conventional lithium-ion cells use binders to hold together the active material and keep it in contact with the current collectors. 27. Once the active material has fallen out of the plates, it cannot be restored into position by any chemical treatment. 28. A ring can be constructed with other optically active materials that are able to conduct a beam with low losses. 29. And, less active material at the electrode also means they have less material available to shed before the cell becomes unusable. 30. Holloway studied the safety of the Little Boy bomb, particularly what would happen if the active material became immersed in water.
