BY STEPHANIE LIOU
Several companies have successfully created partially transparent gadgets such as digital photo frames and cell phones with see-through keyboards. However, fully transparent e-book readers or cell phones have remained largely in the realm of conceptual art due to one last missing puzzle piece.
"If something is smaller than 50 microns, your eyes will feel like it is transparent," said Yang, because the maximum resolving power of the human eye is somewhere between 50 to 100 microns.
This was easier said than done. The pair finally came up with an ingenious three-step process that utilized low-cost, commonly available substances.
The researchers then dropped a liquid slurry solution containing minuscule, nano-sized active electrode materials into the trenches.
Perhaps best of all, the transparent battery is less expensive than one might expect.
"It's very exciting for doing fundamental scientific research," said Cui. "You can study what is happening inside batteries since they are transparent now."