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| Source - phys.org |
Transparent aluminum - famously from Star Trek IV and about which I have posted previously - is fairly well bunk. It's just a version of alumina.
Transparent wood, on the other hand, is a bit closer to being what its name purports to be.
It's wood from which one polymer - lignin - has been removed and replaced with another polymer. Depending on the replacing polymer, the final product 'wood' can have very different properties even becoming fairly transparent.
Original research publication - https://onlinelibrary.wiley.com/doi/10.1002/advs.202100559
More populist article - https://phys.org/news/2019-11-transparent-wood-material-future.html
A skilled amateur tries to recreate the experiment in his lab...
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