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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 41: Organic Thin Films, Organic-Inorganic Interfaces I (joint session DS/CPP)

CPP 41.3: Vortrag

Dienstag, 17. März 2020, 10:00–10:15, CHE 91

Exploring Electron Beam Induced Processing on Porphyrin Multilayers for the Fabrication of Nanostructured Ultrathin Membranes — •Christian Preischl, Elif Bilgilisoy, and Hubertus Marbach — Lehrstuhl für Physikalische Chemie II Friedrich-Alexander Universität Erlangen-Nürnberg

We investigate two gas-assisted electron beam lithography methods, i.e. Electron-Beam-Induced-Deposition and Electron-Beam-Induced-Surface-Activation (EBISA) on porphyrin multilayers. In EBISA, a surface is irradiated by a focused electron beam, resulting in an activation of the exposed area. The activated areas can then lead to the decomposition of suitable precursor gases.^[1] Here we show that EBISA on thin layers of a free-base porphyrin (2HTPP) is compatible with the precursors Fe(CO)₅ and Co(CO)₃NO^[2]. Remarkably, the latter exhibited no EBISA-reactivity on other activated organic substrates like Self-Assembled-Monolayers or Surface-Anchored Metal-Organic Frameworks^[3]. We also demonstrate that thin layers of 2HTPP can be cross-linked to form a 2D carbon membrane via low energetic electron irradiation. This membrane is stable enough to transfer the metallic nanostructures onto any desirable substrate.

^[1] H. Marbach, Appl.Phys. A 117 (2014) 987 ^[2] M. Drost et al., Small Methods 1 (2017) 1700095 ^[3] M. Drost et al., ACS Nano 12 (2018) 3825