163863 20251107115329.0 doi 10.1021/acsaelm.5c01566 sideral 146054 ART-2025-146054 eng García-Serrano, Aitor Molecular Electronics Meets Direct-Write Carbon Nanofabrication via Focused Electron-Beam-Induced Deposition (FEBID): A Platform for Junction Architecture Design 2025 The electrical characteristics of a molecular junction are highly sensitive to the nature and uniformity of the molecule|electrode contacts. This gives rise to significant interest in the development of not only the active molecular structures that modulate charge transport and the anchor groups that contact them to the electrodes, but also methods for assembling uniform molecular monolayers on a substrate electrode and subsequent fabrication of a “top electrode” to achieve the reliable fabrication of viable molecular electronic devices. In this contribution, 4-(4-(4-(trimethylsilylethynyl)phenylethynyl)phenylethynyl)aniline was converted to the corresponding diazonium salt and electrografted onto highly oriented pyrolytic graphite (HOPG), resulting in an organized monolayer covalently bonded to the HOPG “substrate” electrode. Subsequently, focused electron-beam-induced deposition was used to form an amorphous carbon top electrode (C-FEBID) onto the monolayer from a naphthalene precursor. By guiding the raster scanning of the electron beam, the position, shape, and thickness of the carbon electrode “written” onto the monolayer can be controlled with nanometer precision. In addition, as a proof-of-principle demonstration of the construction of the interconnects necessary for integration of molecular devices, platinum was deposited precisely on top of the C-FEBID electrodes, using focused-ion-beam-induced deposition of PtMe3CpMe (CpMe = η5-C5H4Me) (Pt-FIBID). The HOPG|molecule|C-FEBID|Pt-FIBID “large area” junctions produced in this manner exhibited excellent reproducibility and were free of short circuits for top-electrode dimensions ranging from 4 × 4 to 8 × 8 μm2. The electrical characteristics of these devices were measured and modeled by using quantum chemical approaches. These results illustrate alternative routes toward the fabrication of planar 2D devices based on molecular monolayers and carbon electrodes. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S info:eu-repo/grantAgreement/ES/AEI/PDC2023-145810-I00 info:eu-repo/grantAgreement/ES/AEI/PID2022-141433OB-I00 info:eu-repo/grantAgreement/ES/AEI/PID2023-146451OB-I00 info:eu-repo/grantAgreement/ES/AEI/TED2021-131318B-I00 info:eu-repo/grantAgreement/ES/DGA/E31-23R info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Sangtarash, Sara González-Orive, Alejandro Sadeghi, Hatef Martín, Santiago Universidad de Zaragoza (orcid)0000-0001-9193-3874 Herrer, Lucía Universidad de Zaragoza (orcid)0000-0002-3576-5156 Nichols, Richard J. Low, Paul J. Lambert, Colin J. de Teresa, José María (orcid)0000-0001-9566-0738 Sangiao, Soraya Universidad de Zaragoza (orcid)0000-0002-4123-487X Cea, Pilar 2012 755 Universidad de Zaragoza Dpto. Química Física Área Química Física 2003 395 Universidad de Zaragoza Dpto. Física Materia Condensa. Área Física Materia Condensada 7, 20 (2025), 9470-9479 ACS applied electronic materials 2637-6113 4087950 http://zaguan.unizar.es/record/163863/files/texto_completo.pdf Versión publicada 3196413 http://zaguan.unizar.es/record/163863/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:163863 articulos driver 2025-11-07-10:26:14 ARTICLE