Optical image of a 0.10 wt% SiNW-BBF on 150 mm Si wafer. Insets dark-field (DF) optical images showing aligned SiNWs at different locations. Scale bar: 10 mm.
(b) The NW spacing and density versus NW loading plot. Insets, two DF optical images taken from 0.03 and 0.15 wt% SiNW-BBFs. Scale bars: 20 mm (left), 10 mm (right).