Salicylaldehyde is a key player in making medicines and scents. But, it's not so great for the environment or our health. So, finding a way to spot it is important. That's where a new tool comes in. It's called HNU-90-Tb. This tool is made by combining terbium and another chemical called 4-carboxytriphenylamine. The cool thing about HNU-90-Tb is that it can handle w...

Imagine a material that changes color when it comes into contact with water. Sounds like magic, right? It's actually the work of hydrochromic materials, which are hot topics in sensing and security. Perovskite materials are known for their water-induced color changes, but making this happen in perovskite-polymer composites has been tough because water can't get throu...