(a) TEM bright field morphology of a Ag FTNW with diameter of 55 nm. (b) The reconstructed 3D intensity distribution of (331) and (331¯) reflections from the Ag FTNW with diameter of 55 nm as shown in panel (a). (c) The g₍₀₀₂₎ reciprocal vectors of five single crystalline segments (T1∼ T5) illustrated by black solid lines with arrows and their relative orientation relationship deducted from (b). In panel (c), the red dots represent the ending points of g₍₀₀₂₎ vectors projected on X–Y, X–Z, and Y–Z reciprocal planes, respectively. (d) The projections of the five g₍₀₀₂₎ vectors on the X–Y reciprocal plane which is perpendicular to the nanowire twinning axis, i.e., Z direction.