1. The problem statement, all variables and given/known data I have a simple writing assignment where my professor has asked us to write a couple pages about: - What a nano particle is, and the physics of how it's structure remains stable. The first part I've got covered. It's the structure part that's throwing me off. This is a very basic physics course so nothing outrageous is required, but after many searches through my school library database and through google, every resource I find is either way too complicated for me to understand or off-topic. Also, every source that I'm finding seems to be chemistry related so I'm not sure why he gave us this assignment. Anyway, if anyone could provide some simple resources - or maybe hint at what's he getting at with the structure that would be greatly appreciated. So far in class he has covered (very lightly) some topics like quantum energy states of electrons and gave us this equation: 2. h x nu = E2-E1 and also talked a bit about how states can be super positioned? or something. I'm not sure that's even related though, so it's entirely possible he has never covered anything that I would need. but we don't need any math for the course as that is not the focus. It is just about understanding concepts at a basic level. 3. The attempt at a solution So far I have found mentions of multivalent bonding causing nanoparticles to be more stable on wikipedia but that is all. Unfortunately, I cannot simply write about what I believe to be the answer without providing sources. Thank you for any assistance.