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

Art as Inspiration for Science

What inspires people to do science? Perhaps you, Dear Reader, are interested in understanding how the physical world works.  Maybe you saw a rainbow, or ocean waves on the beach, when you were a kid, and therefore have a love for optics, physics, or oceanography. Human-made objects can also inspire scientists.  Quite a few people … Continue reading