https://chemistry.osu.edu/~coe/research/documents/Coe_NiSPS_jp034934w.pdf
look at figure 1 as a comparison of the optical properties of these metals. For nickel in the infrared, the real and imaginary components of the dielectric are almost identical promoting resonances. "The condition for narrow resonances is satisfied by silver and gold throughout the visible and infrared regions; therefore, these are the metals of choice for work in the visible region. Chemically interesting metals such as nickel (as shown in Figure 1) chromium, palladium, platinum, and tungsten satisfy narrow resonance conditions only in the infrared" Note that chromium, palladium, platinum, and tungsten are all used in LENR because of their superior Plasmon friendly characteristics in the infrared. On Wed, May 28, 2014 at 11:56 PM, <[email protected]> wrote: > In reply to Axil Axil's message of Wed, 28 May 2014 22:16:29 -0400: > Hi, > > >"Heat based technologies have the added requirement to maximize > temperature > >rise, which implies minimizing radiation in the thermal infrared band. > Thus > >there are conflicting requirements of strong absorption in the visible, > >with minimum emission in the far infrared range; the figure of merit > >for this is termed selectivity. " > > > >The requirement called for here is for minimum emission in the far > infrared > >range. Minimum emission means refection. > > Actually the called for requirement is for maximum absorption in the > visible > range *combined* with minimal emission in the far infrared. > > http://arxiv.org/ftp/arxiv/papers/1202/1202.6603.pdf appears to > concentrate > primarily on the properties in the visible range. I don't see any mention > of the > properties of Nickel in the far infrared. > Perhaps you could point it out? > > > > > > >Nickel meets the requirement because it has minimum emission in the far > >infrared range. > > > >"This paper has studied absorption in ultra-thin layers of nickel, gold > and > >silver. It is shown that nickel possesses optical properties that make it > >ideal for use in solar thermal and solar thermionic applications and that > >there is an optimum thickness for maximising absorption across the solar > ^^^^^^^^^^ > >spectrum of ~10-13nm." > [snip] > Regards, > > Robin van Spaandonk > > http://rvanspaa.freehostia.com/project.html > >
