The article says they worked around the copper impurities, but I wonder if they overcame the silicon impurity issues that cause low performance and "disappointi

The article says they worked around the copper impurities, but I wonder if they overcame the silicon impurity issues that cause low performance and "disappointing results" in most applications.[1] Summary[2][3] [1] https://www.nature.com/articles/s41467-018-07396-3 https://www.nature.com/articles/s41467-018-07396-3 [2] https://phys.org/news/2018-11-full-potential-supermaterial-graphene.html https://phys.org/news/2018-11-full-potential-supermaterial-g... [3] https://www.createdigital.org.au/graphene-performance-revealed-silicon/ https://www.createdigital.org.au/graphene-performance-reveal...