title: Pure &crystallized 2D Boron Nitride sheets synthesized via a novel process coupling both PDCs and SPS methods.
abstract: Within the context of emergent researches linked to graphene, it is well known that h-BN nanosheets (BNNSs), also referred as 2D BN, are considered as the best candidate for replacing SiO2 as dielectric support or capping layers for graphene. As a consequence, the development of a novel alternative source for highly crystallized h-BN crystals, suitable for a further exfoliation, is a prime scientific issue. This paper proposes a promising approach to synthesize pure and well-crystallized h-BN flakes, which can be easily exfoliated into BNNSs. This new accessible production process represents a relevant alternative source of supply in response to the increasing need of high quality BNNSs. The synthesis strategy to prepare pure h-BN is based on a unique combination of the Polymer Derived Ceramics (PDCs) route with the Spark Plasma Sintering (SPS) process. Through a multi-scale chemical and structural investigation, it is clearly shown that obtained flakes are large (up to 30 μm), defect-free and well crystallized, which are key-characteristics for a subsequent exfoliation into relevant BNNSs.
authors: Laboratoire des Multimatériaux et Interfaces, CNRS, UMR 5615, Université Lyon 1, Université de Lyon, F-69622, Villeurbanne, France.|Matériaux Ingénierie et Science, UMR CNRS 5510, INSA de Lyon, Université de Lyon, F- 69621, Villeurbanne, France.
authors: Sheng
authors: S
authors: Yuan
authors: Laboratoire des Multimatériaux et Interfaces, CNRS, UMR 5615, Université Lyon 1, Université de Lyon, F-69622, Villeurbanne, France.
authors: Sébastien
authors: S
authors: Linas
authors: Laboratoire des Multimatériaux et Interfaces, CNRS, UMR 5615, Université Lyon 1, Université de Lyon, F-69622, Villeurbanne, France.
authors: Catherine
authors: C
authors: Journet
authors: Matériaux Ingénierie et Science, UMR CNRS 5510, INSA de Lyon, Université de Lyon, F- 69621, Villeurbanne, France.
authors: Philippe
authors: P
authors: Steyer
authors: Matériaux Ingénierie et Science, UMR CNRS 5510, INSA de Lyon, Université de Lyon, F- 69621, Villeurbanne, France.
authors: Vincent
authors: V
authors: Garnier
authors: Matériaux Ingénierie et Science, UMR CNRS 5510, INSA de Lyon, Université de Lyon, F- 69621, Villeurbanne, France.
authors: Guillaume
authors: G
authors: Bonnefont
authors: Laboratoire des Multimatériaux et Interfaces, CNRS, UMR 5615, Université Lyon 1, Université de Lyon, F-69622, Villeurbanne, France.
authors: Arnaud
authors: A
authors: Brioude
authors: Laboratoire des Multimatériaux et Interfaces, CNRS, UMR 5615, Université Lyon 1, Université de Lyon, F-69622, Villeurbanne, France.
authors: Bérangère
authors: B
authors: Toury