‘Blinking’ titanium dioxide crystals may prove useful

(Credit: PNNL/Flickr)

Researchers have created ultra-small titanium dioxide crystals that exhibit unusual “blinking” behavior.

The crystals may help to produce methane and other fuels, according to a study in the journal Angewandte Chemie.

The crystals, also known as nanoparticles, stay charged for a long time and could benefit efforts to develop quantum computers.

“Our findings are quite important and intriguing in a number of ways, and more research is needed to understand how these exotic crystals work and to fulfill their potential,” says senior author Tewodros (Teddy) Asefa, a professor in the department of chemistry and chemical biology at Rutgers University-New Brunswick. He’s also a professor in the department of chemical and biochemical engineering in the School of Engineering.

More than 10 million metric tons of titanium dioxide are produced annually, making it one of the most widely used materials, the study notes. It is used in sunscreens, paints, cosmetics, and varnishes, for example. It’s also used in the paper and pulp, plastic, fiber, rubber, food, glass, and ceramic industries.

The team of scientists and engineers discovered a new way to make extremely small titanium dioxide crystals. While it’s still unclear why the engineered crystals blink and research is ongoing, the “blinking” is believed to arise from single electrons trapped on titanium dioxide nanoparticles. At room temperature, electrons—surprisingly—stay trapped on nanoparticles for tens of seconds before escaping and then become trapped again and again in a continuous cycle.

The crystals, which blink when exposed to a beam of electrons, could be useful for environmental cleanups, sensors, electronic devices, and solar cells, and the research team will further explore their capabilities.

Coauthors of the study are from Rutgers, Wuhan University of Technology, and Czech Academy of Sciences. The research had funding from the US National Science Foundation.

Source: Rutgers University