However , many solvents that can be used to exfoliate boron nitride are fairly toxic and expensive .
Combinations of different solvents also exfoliate boron nitride better than when the solvents were used individually .
Many solvents that can be used to exfoliate boron nitride are fairly toxic and expensive .
Combinations of different solvents also exfoliate boron nitride better than when the solvents were used individually .