Tech
Sleep-friendlier lighting is on the way
Chemists have created a new glowing material for LEDs. It should lessen how much near-bedtime lighting impairs your ability to nod off.
By Manasee Wagh
Chemistry
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Materials ScienceCopper ‘foam’ could be used as filters for COVID-19 masks
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ChemistryScientists Say: Alkaline
Alkaline chemicals are basic — substances that produce hydroxide ions in solution.
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ChemistryNew recycling technologies could keep more plastic out of landfills
Recycling plastics is really hard — especially into useful materials. But new chemical tricks could make recycling easier.
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ChemistryExplainer: What are chemical bonds?
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ChemistryLevel up your demonstration: Make it an experiment
What’s the difference between a demonstration and an experiment? Questions, measurements and many, many replications.
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ChemistryLet’s learn about acids and bases
Acids give away particles with positive charge. Bases accept positively charged particles. They are both critical for chemical reactions.
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ChemistryExtreme pressure? Diamonds can take it
Diamond retains its structure even at extreme pressures, which could reveal how carbon behaves in the cores of some exoplanets.
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PhysicsScientists Say: Piezoelectric
Piezoelectric materials produce an electric voltage when they are bent or squished. This can let us harvest electricity from movement.