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Scientists invent new color-changing wild sparklers


From weddings to Independence Day celebrations, sparklers are a hot choice for bringing light, fire and fun to a party. A team of researchers experimented with new recipes for sparklers and came up with some wild color-changing and branching pyrotechnic effects.

There are already candles on the market that change color as they burn, but these new formulations change mid-spark. The secret is in the materials that burn. The combination of ytterbium, a rare earth metal, with copper created a shower of long sparks that turned from gold to green.

The American Chemical Society (ACS) released a video on Wednesday showing the sparkler experiments in action.

The team published their findings in the American Chemical Society’s journal ACS Omega in August.

The researchers also experimented with creating eye-catching fountains. “A powdered version of neodymium magnets created the most attractive fountain with continuously branching sparks, with each initial ‘mother spark’ producing many more sparks in just a fraction of a second,” ACS said in a statement. .

Striking sparklers won’t be found at fireworks stands anytime soon. ACS noted that “researchers warn that recipes must undergo additional safety testing before they can be used in commercial products.”

CNET

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