Researchers discovered a tiny droplet of acid could do the job of large amounts of harmful chemicals usually used for turning aluminum transparent. (fotaro100/Shutterstock) =================================================================== In a nutshell * Scientists have developed a technique to transform aluminum into transparent aluminum oxide using just a droplet of acid and low voltage (2V), dramatically reducing chemical waste compared to traditional methods that require full immersion in acid baths. * The transparent material allows more than 70% of visible light to pass through while blocking some near-infrared light, making it potentially valuable for applications in electronics, solar panels, optical sensors, and energy-efficient windows....