I found the original article: https://www.nature.com/articles/s41560-023-01226-7 https://www.nature.com/articles/s41560-023-01226-7 They achieved r-values of 5-

I found the original article: https://www.nature.com/articles/s41560-023-01226-7 https://www.nature.com/articles/s41560-023-01226-7 They achieved r-values of 5-9 per inch, if I read the graph right.