blog post

How can you calculate how many atoms are in a nanoparticle?

Two years ago, I wrote a blog post called Two Ways to Make Nanoparticles, describing the difference between top-down and bottom-up methods for making nanoparticles. In the post I commented, “we can estimate, knowing how gold atoms pack into crystals, that there are about 2000 gold atoms in one 4 nm diameter gold nanoparticle.” Recently, a Sustainable Nano reader wrote in to ask about … Continue reading

blog post

The Science of Snow

In the CSN, we like to study and understand small things. Everyone knows the adage “no two snowflakes are alike,” but what actually goes into creating this variety of shapes at a molecular level? It seems fitting, as we’re experiencing the end of snowy weather here in the Midwestern U.S., to dig into the science … Continue reading