They might come up with $6M for thermal control inside satellites.
On 5/30/23, MSF wrote:
> We're digressing from the subject at hand, but it allows me some
> self-indulgent nostalgia.
>
> As you are no doubt aware, even black paint made to coat the interior of
> optical instruments has the
We're digressing from the subject at hand, but it allows me some self-indulgent
nostalgia.
As you are no doubt aware, even black paint made to coat the interior of
optical instruments has the problem of a quite high glancing angle reflectance.
My nanoporous aluminum film has a very low
I no longer have the instruments to measure the absorptance and
reflectance of materials; but, most optical instruments have black
paint on the inside walls. A new source of very black films or sheets
could be a useful addition because, over the years, the paint turns
grey.
On 5/30/23, MSF
I haven't the equipment or the time to measure the degree and spectrum of the
"blackness". Suffice it to say, you can still see a very dim spot if you shine
a variety of lasers of different wavelengths onto the surface. Naturally, the
substrate, PET film, heats up and burns when you do this.
I
depending on its degree and spectrum of "blackness" (and cost?), it
could have many applications. Did it retain its properties as the
oxide grew?
On 5/29/23, MSF wrote:
> Thanks. That's an informative analysis
>
> The nanoporous aluminum layer I made was approx. 400 nm thick. It could be
> made
Thanks. That's an informative analysis
The nanoporous aluminum layer I made was approx. 400 nm thick. It could be made
thicker or thinner as required. I haven't had the setup to make this stuff for
quite some time, but I'm tempted to do it again. I was making it in 600 mm
square sheets, but it
Speaking of Randell, has he yet produced a product for the millions
invested?
On Mon, May 29, 2023, 4:25 PM Robin
wrote:
> In reply to MSF's message of Mon, 29 May 2023 18:48:52 +:
> Hi,
>
> If you follow the link to the original article, then download the
> supporting materials pdf, the
In reply to MSF's message of Mon, 29 May 2023 18:48:52 +:
Hi,
If you follow the link to the original article, then download the supporting
materials pdf, the original experiment
reported at best about 250 nW / cm^2. This may not seem like much, but the
layer could be made very thin,
https://www.umass.edu/news/article/engineers-umass-amherst-harvest-abundant-clean-energy-thin-air-247
No energy density is given. So it might just be an interesting curiosity.
This whole concept is of particular interest to me because of the nanoporous
metals I was making several years ago. The
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