Field emission from ordered carbon nanotube-ZnO heterojunction arrays

Abstract. Low operating electric field and stable emission current have been achieved on ordered carbon nanotube (CNT)-ZnO heterojunction arrays. Pyramid-like micropatterns were firstly prepared via capillarity-driven self-assembly from aligned CNTarrays, ZnO nanowires were subsequently grown via vapor-phase transport (VPT) method. Based on the effect of geometrical structure, low turn-on and …