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Instruments / Technical Area	Publication Details	Published	Actions
E02-JEM ARM 300CF I09-Surface and Interface Structural Analysis	One-step synthesis of graphene containing topological defects Benedikt P. Klein , Matthew A. Stoodley , Joel Deyerling , Luke A. Rochford , Dylan B. Morgan , David G. Hopkinson , Sam Sullivan-Allsop , Henry Thake , Fulden Eratam , Lars Sattler , Sebastian M. Weber , Gerhard Hilt , Alexander Generalov , Alexei Preobrajenski , Thomas Liddy , Leon B. S. Williams , Mhairi A. Buchan , Graham A Rance , Tien-Lin Lee , Alex Saywell , Roman Gorbachev , Sarah J. Haigh , Christopher S. Allen , Willi Auwärter , Reinhard Maurer , David A. Duncan Chemical Science DOI: 10.1039/D5SC03699B Diamond Proposal Number(s): [25379, 30875, 31695, 31165, 33709] Open Access Show Abstract ▼ Abstract: Chemical vapour deposition enables large-domain growth of ideal graphene, yet many applications of graphene require the controlled inclusion of specific defects. We present a one-step chemical vapour deposition procedure aimed at retaining the precursor topology when incorporated into the grown carbonaceous film. When azupyrene, the molecular analogue of the Stone–Wales defect in graphene, is used as a precursor, carbonaceous monolayers with a range of morphologies are produced as a function of the copper substrate growth temperature. The higher the substrate temperature during deposition, the closer the resulting monolayer is to ideal graphene. Analysis, with a set of complementary materials characterisation techniques, reveals morphological changes closely correlated with changes in the atomic adsorption heights, network topology, and concentration of 5-/7-membered carbon rings. The engineered defective carbon monolayers can be transferred to different substrates, potentially enabling applications in nanoelectronics, sensorics, and catalysis.	Sep 2025
I09-Surface and Interface Structural Analysis	Boron-induced transformation of ultrathin Au films into two-dimensional metallic nanostructures Alexei Preobrajenski , Nikolay Vinogradov , David A. Duncan , Tien-Lin Lee , Mikhail Tsitsvero , Tetsuya Taketsugu , Andrey Lyalin Nature Communications 15 DOI: 10.1038/s41467-024-54464-y Open Access Show Abstract ▼ Abstract: The synthesis of large, freestanding, single-atom-thick two-dimensional (2D) metallic materials remains challenging due to the isotropic nature of metallic bonding. Here, we present a bottom-up approach for fabricating macroscopically large, nearly freestanding 2D gold (Au) monolayers, consisting of nanostructured patches. By forming Au monolayers on an Ir(111) substrate and embedding boron (B) atoms at the Au/Ir interface, we achieve suspended monoatomic Au sheets with hexagonal structures and triangular nanoscale patterns. Alternative patterns of periodic nanodots are observed in Au bilayers on the B/Ir(111) substrate. Using scanning tunneling microscopy, X-ray spectroscopies, and theoretical calculations, we reveal the role of buried B species in forming the nanostructured Au layers. Changes in the Au monolayer’s band structure upon substrate decoupling indicate a transition from 3D to 2D metal bonding. The resulting Au films exhibit remarkable thermal stability, making them practical for studying the catalytic activity of 2D gold.	Dec 2024

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