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Title: Toward the controlled synthesis of hexagonal boron nitride films. Author: Ismach A, Chou H, Ferrer DA, Wu Y, McDonnell S, Floresca HC, Covacevich A, Pope C, Piner R, Kim MJ, Wallace RM, Colombo L, Ruoff RS. Journal: ACS Nano; 2012 Jul 24; 6(7):6378-85. PubMed ID: 22702240. Abstract: Atomically smooth hexagonal boron nitride (h-BN) layers have very useful properties and thus potential applications for protective coatings, deep ultraviolet (DUV) emitters, and as a dielectric for nanoelectronics devices. In this paper, we report on the growth of h-BN by a low-pressure chemical vapor deposition (LPCVD) process using diborane and ammonia as the gas precursors. The use of LPCVD allows synthesis of h-BN with a controlled number of layers defined by the growth conditions, temperature, time, and gas partial pressure. Furthermore, few-layer h-BN was also grown by a sequential growth method, and insights into the growth mechanism are described, thus forming the basis of future growth of h-BN by atomic layer epitaxy.[Abstract] [Full Text] [Related] [New Search]