Can Different Metals and Configurations Achieve Plasmon Resonance at 266nm?

[excalibur313]

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!

 

[Valerie Park]

</code>The plasmon resonance of a particle is indeed based on both the material and the shape. For a round particle, smaller particles tend to have a resonance that is shifted further toward the UV. To get a resonance as far in the UV as possible, say 266 nm, there are some metals that can achieve this. Gold nanospheres have a plasmon resonance peak near 266 nm, and other metals such as silver and aluminum may also be able to reach this wavelength. In addition, the formulas used to calculate the native plasmon resonance of a metal depend on the material properties of the metal. The formula for calculating the plasmon resonance of a metal is given by:λ = (2πhc/e2) × (m/n)1/2where h is Planck's constant, c is the speed of light, e is the elementary charge, m is the electron mass, and n is the refractive index of the metal. By plugging in the appropriate values for each of these parameters, you can calculate the native plasmon resonance wavelength of any given metal. Hope this helps!

 

[charng]

I can confirm that the plasmon resonance of a particle is indeed dependent on both the material and the shape of the particle. The smaller the particle, the further it will resonate towards the UV region. However, it is not accurate to say that smaller particles will always resonate further towards the UV. The plasmon resonance of a particle is also affected by its dielectric environment and the surrounding medium.

To answer your question, yes, there are metals and configurations that can achieve plasmon resonance at 266nm. Silver is known to have a plasmon resonance at around 400nm, but there are other metals such as gold, copper, and aluminum that have plasmon resonances in the UV region. The exact resonance wavelength will depend on the size, shape, and dielectric environment of the particle.

In terms of formulas for calculating plasmon resonance, there are various theoretical models and equations that can be used. These include the Mie theory, the Drude model, and the Maxwell-Garnett model. These models take into account the properties of the metal, the shape and size of the particle, and the dielectric environment to predict the plasmon resonance wavelength.

I hope this helps clarify your question about achieving plasmon resonance at 266nm. It is important to note that achieving plasmon resonance at a specific wavelength is a complex process and may require optimization of various factors. Further research and experimentation may be necessary to determine the best metal and configuration for your desired plasmon resonance.