The plasmon peak shifts of Janus particles will be measured. A comparison to theory would be good.
How are you shelling only half of the particles?
this might help but I think the LSPR requires a full structure to oscillate otherwise it broadens into discrete transitions.
Dowgiallo AM, Schwartzberg AM, Knappenberger KL. Structure-dependent coherent acoustic vibrations of hollow gold nanospheres. Nano Lett. 2011, Aug 10;11(8):3258-62
thank you, it is very interesting.
The particles form a self-assembled monolayer using dip coating. Thin gold layers are deposited on top and the particles are detached from the surface and diluted in solution.
The analytical solution to a sphere-shell system is available in bohren/huffman using Mie theory; however, for a half shell, you'd need to use FDTD or another brute-force maxwell equation solver to get an approximate solution to the optical responses. I recommend trying FDTD by Lumerical. The trial version is 30 days or so, and that may be all you need. The FDTD is straightforward, but setting up the geometry properly is where these industrial equation solvers really help out.
http://onlinelibrary.wiley.com/book/10.1002/9783527618156
http://www.lumerical.com/tcad-products/fdtd/
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