Hi everyone, I have a question about surface plasmons that I hope someone can clear up. I have been told that the plasmon resonance of a particular particle is based on the material and also the shape. I know that in the case for a round particle, smaller particles will resonate further toward the UV. If I have the desire to have the particle to resonate as far in the UV as I could get, say 266 nm as a worst case scenario, are there any metals/configurations that could do that? I think that as you make the particle smaller, it approaches its native plasmon resonance and then you can't go any further. I think silver is about 400 nm, but I was curious if there were other metals that could go further. (I know that its resonance won't be as sustained as silver) Ideally the formulas required for determining this kind of stuff would be ideal. I think there is this one where you can calculate the native plasmon resonance from data gained from properties of that metal, but I wasn't given the full story. Thank you so much for your help!