Fig. 3From: Spontaneous formation of boron nitride nanotube fibers by boron impurity reduction in laser ablation of ammonia boranea–d Form, (e–h) morphology and i–l structure images of reaction products at 2, 4, 8 and 12 bar when the chamber is full of N2. BNNTs were dominant product at 8 and 12 bar and h-BN was dominant product at 2 and 4 barBack to article page