WEB Nano Saclay
• Flagship 2020-2024 : BOGART (Bottom-up Synthesis of Graphene Related Materials )

The project BOGART aims to achieve a breakthrough in terms of synthesis and exploitation of the optical and electronic properties of graphene related materials.

The outstanding electronic, optical and mechanical properties of graphene have inspired the scientific community at both the fundamental and application levels. However, along the way several key scientific issues have to be addressed and one of the main challenges is the control and modification of graphene electronic properties; this concerns notably the controlled opening of a sizable bandgap. It is well known that when a material is reduced to nanoscale dimensions, the electronic confinement induces original size-dependent properties. The reduction of one dimension of graphene down to the nanoscale leads to graphene nanoribbons (GNRs) while the reduction of the two dimensions leads to graphene quantum dots (GQDs). Size reduction is not the only way to open a gap in graphene. A very appealing alternative to the reduction of graphene dimensionality consists in forming an ordered array of holes in a graphene sheet. This 2D-material theoretically proposed in 2008 was called a Graphene Nanomesh (GNM).

Over the last decade, great attention has been paid to the size reduction of graphene using conventional top-down approaches (lithography and etching, thermal treatments and oxidation of bulk materials) to fabricate GQDs, GNRs and GNMs. However, the top-down approaches are not suitable for the manipulation of the structure of the material at the atomic scale. In particular, they do not allow sufficient control of the morphology and oxidation state of the edges, which drastically affect the properties. To achieve atomically precise materials, the bottom-up approach must be considered.

In this context, the objectives of the project BOGART are to synthesize original and controlled graphene nanostructures and to study their optical and electronic properties. To this end the project brings together five partners with complementary skills: chemistry, STM/STS, optical spectroscopy, theory and numerical simulations to achieve an ambitious program to engineer graphene materials exhibiting tailor-made optical and electronic properties.

Contact : , NIMBE




#205 - Last update : 02/20 2020


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