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DTSTAMP:20260424T163644Z
UID:1685955600@ist.ac.at
DTSTART:20230605T110000
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DESCRIPTION:Speaker: Jani Kotakoski\nhosted by Maria Ibáñez\nAbstract: Gr
 aphene—the one-atom-thick sheet of carbon—is the most famous of 2D mat
 erials due to its unique electronic properties and mechanical strength. Ho
 wever\, its chemical inertness makes graphene also an excellent nearly ele
 ctron-transparent support for other materials and nanostructures. In this 
 presentation\, I will give an overview of our recent work enabled by a uni
 que interconnected vacuum system containing an aberration-corrected scanni
 ng transmission electron microscope Nion UltraSTEM 100 with a unique objec
 tive area that allows sample cleaning via laser\, in situ chemical experim
 ents\, and direct vacuum transfer to an atomic force microscope (AFSEM by 
 GeTEC Microscopy)\, to-and-from an argon glove box\, target chamber with a
  plasma ion source and evaporators\, and long term vacuum sample storage. 
 In brief\, I will demonstrate that defect-engineering of graphene [1] enab
 les its substitutional heteroatom doping [2] and growth of nanoclusters wi
 th a well-defined concentration and a narrow size distribution\, as well a
 s the direct correlation of its atomic structure and mechanical properties
 . I will further show that graphene can be used as a support for the growt
 h of 2D CuAu [3] and describe the first steps of the growth of Ti on graph
 ene [4]. Finally\, I will provide examples of otherwise unstable structure
 s being stabilized in the van der Waals gap between two graphene sheets\, 
 including a mono-layer of fullerenes [5]\, 2D CuI [6] and small noble gas 
 clusters [7].References [1] Trentino et al.\, Nano Lett. 21\, 5179-5185 (2
 021)[2] Inani et al.\, J. Phys. Chem. C 123\, 13136-13140 (2019)\; Zagler 
 et al.\, 2D Mater. 9\, 035009 (2022)\; Trentino et al.\, 2D Mater. 9\, 025
 011 (2022)[3] Zagler et al.\, 2D Mater. 7\, 045017 (2020)[4] Zagler et al.
 \, ArXiv: 2204.09669 (2022)[5] Mirzayev et al.\, Sci. Adv. 3\, e1700176 (2
 017)[6] Mustonen et al.\, Adv. Mater.\, 202106922 (2022) [7] Längle et al
 .\, Microsc. Microanal. 26 S2\, 1086-1089 (2020)
LOCATION:Sunstone Bldg / Ground floor / Lab Meeting room I23.EG.005\, ISTA
ORGANIZER:
SUMMARY:Jani Kotakoski: New materials and nanostructures in and in-between 
 graphene monolayers
URL:https://talks-calendar.ista.ac.at/events/4155
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