Scientists 'draw' crystals with gold and laser for better solar panels

Researchers at Michigan State University have developed a groundbreaking technique to precisely control the growth of crystals by using a single laser pulse targeted at gold nanoparticles. This method enables crystals to form at exact locations and times, overcoming the traditional unpredictability of crystal nucleation and growth. The team focused on lead halide perovskites—materials integral to solar cells, LEDs, and medical imaging—and discovered that laser-induced heating of gold nanoparticles initiates crystallization. Their use of high-speed microscopy allowed real-time observation and steering of crystal formation. This innovative approach effectively allows scientists to "draw" crystals with laser precision, potentially revolutionizing the fabrication of high-quality materials for advanced technologies such as clean energy and quantum devices. The technique not only advances material design but also sheds new light on the fundamental chemistry of crystal formation. Future research aims to employ multiple lasers of different colors to create complex crystal patterns and synthesize novel materials unattainable by conventional methods, with plans to integrate these crystals into practical devices. The study was