You can focus X-rays, although I don't think nanometer resolution was achieved yet. For example: https://www.nature.com/articles/s41598-021-98888-8 https://www.

You can focus X-rays, although I don't think nanometer resolution was achieved yet. For example: https://www.nature.com/articles/s41598-021-98888-8 https://www.nature.com/articles/s41598-021-98888-8