Aluminum-catalyzed growth of silicon nanowires on metal substrate by thermal CVD systhesis
摘要
Metal-mediated vapor-liquid-solid (VLS) growth represents a highly promising approach for the fabrication of silicon nanowires [1–4]. Gold is widely employed as the metallic catalyst in such processes, yet its high cost and the adverse impacts on the electronic properties of silicon nanowires associated with gold incorporation pose significant limitations [1, 4, 5]. As a shallow acceptor in silicon, aluminum (Al) has emerged as a critical research candidate for the growth of silicon nanowires [1, 6]. This paper investigates the fabrication of silicon nanowires catalyzed by metallic aluminum under low-cost laboratory conditions, along with the performance characteristics of the nanowires and their availability in lithium-ion batteries [1]. The first section focuses on aluminum-catalyzed nanowire growth techniques, with emphasis on the influences of growth parameters including temperature and pressure on the morphology and crystallinity of the nanowires [1, 6, 7], and validates the catalytic role of aluminum [2]. Finally, the applications of aluminum-catalyzed VLS-grown silicon nanowires in lithium-ion batteries are summarized [2, 3, 8, 9].