Fabrication of Vertically Aligned Single‐Crystalline Boron Nanowire Arrays and Investigation of Their Field‐Emission Behavior

Aligned single crystalline boron nanowire arrays are formed by thermal carbon reduction. The SEM image shows an array of boron nanowires (ca. 5 µm long) vertically aligned in high density on a Si substrate. These nanowires have a high enhancement factor, good emission stability, and can endure high current, which suggest they are an excellent candidate for field-emission applications.