Toward understanding the interactions between liposomes and graphene for the application of lipidic structures on graphene
- Date
- Thursday 24 October 2024
- Time
- Address
-
Gorlaeus Building
Einsteinweg 55
2333 CC Leiden - Room
- BM.1.23
N. Ghanadana,b, V. Reina, M. Jankowskia, O.V. Konovalova, G. Renaudc, I.M.N. Grootb
aEuropean Synchrotron Radiation Facility – ESRF, bLeiden University,cUniversité Grenoble Alpes/CEA IRIG/MEM/NRS
Abstract
Two-dimensional materials (2DMs), such as graphene and hexagonal boron nitride (h-BN), are a promising class of materials for the advancement of nanoelectronics. Nearly two decades following their discovery however, the production of defect-free 2DMs remains a challenge. The most common synthesis method, chemical vapor deposition (CVD), involves the dissociative adsorption of gas-phase precursors on solid substrates. However, polycrystalline substrates’ surfaces exhibit mosaicity, grain boundaries, anisotropy, and lattice mismatch, which negatively impact 2DM quality thus compromising their unique physicochemical properties [1]. Recent research has shown that liquid metal catalysts (LMCats) provide an efficient alternative, as they offer an atomically flat and isotropic molten surface with low surface roughness [2]. The difficulty of monitoring 2DM growth on LMCat substrates, however, has resulted in limited research focus in this area. Addressing this challenge, our team developed a dedicated reactor [3] combining synchrotron X-ray methods and radiation-mode optical microscopy to monitor, regulate, and characterize 2DM growth on LMCats in situ and in real time. This has led to significant advancements, particularly in the theoretical and experimental validation of LMCats' benefits for graphene growth [4,5]. We now extend this methodology to achieve in situ X-ray characterization of single-layer 2D h-BN growth LMCats using synchrotron X-ray Reflectometry (XRR) and Grazing Incidence Diffraction (GID). The measurements made possible through our unique experimental setup enabled the extraction of unprecedentedly sensitive information regarding our samples’ crystallinity, strain, unit cell parameters, as well as the bonding strength between h-BN and the LMCat substrate. The insights gained here offer a deeper understanding of the CVD growth process for h-BN on LMCats, guiding future advancements in the synthesis and application of 2D materials.
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