Topic: Materials Science

Researchers at NYU have developed a way to use light to control how tiny particles arrange themselves into crystals. This breakthrough could lead to new materials that can be programmed and reconfigured using light.

Crystals are all around us, from snowflakes to diamonds. But scientists have struggled to control exactly how they form. Now, researchers at NYU have found a way to use light to guide the process. They added special molecules called photoacids to a liquid containing tiny particles that can stick together and form crystals. When they shone light on the mixture, the photoacids became more acidic, changing how the particles interacted with each other. This allowed them to control whether the particles stuck together or pushed apart.

The scientists used this technique to create crystals in real-time, growing or dissolving them as needed. They could even reshape and 'sculpt' the structures using light. This breakthrough has the potential to lead to new materials that can be programmed and reconfigured using light.

One of the advantages of this approach is that it's a simple and straightforward process. The researchers didn't need to redesign the particles or adjust salt concentrations in separate trials. They could simply change the level of illumination to prompt the particles to assemble into crystals or break apart again.

Why It Matters

This breakthrough has the potential to lead to new materials that can be programmed and reconfigured using light. This could have important implications for fields like optics, photonics, and advanced materials science.

Key Facts

• Researchers at NYU have developed a way to use light to control how tiny particles arrange themselves into crystals.
• The technique uses special molecules called photoacids that become more acidic when exposed to light.
• This allows scientists to control whether the particles stick together or push apart, enabling real-time crystal growth and melting.

Key Terms

Photoacids

Special molecules that change their properties when exposed to light

Implications

This breakthrough has the potential to lead to new materials that can be programmed and reconfigured using light. This could have important implications for fields like optics, photonics, and advanced materials science.