Boron nitride nanoribbons ( BNNR ) are boron nitride nanosheets with significant edge effects .
Boron nitride nanoribbons ( BNNR ) have widths that are smaller than 50 nanometers .
Boron nitride nanoribbons ( BNNR ) are boron nitride nanosheets with significant edge effects and have widths that are smaller than 50 nanometers .