000125882 001__ 125882 000125882 005__ 20230427100918.0 000125882 037__ $$aTESIS-2023-085 000125882 041__ $$aeng 000125882 1001_ $$aDomínguez Celorrio, Amelia 000125882 24500 $$aOn-surface synthesis of functional organic nanostructures 000125882 260__ $$aZaragoza$$bUniversidad de Zaragoza, Prensas de la Universidad$$c2022 000125882 300__ $$a156 000125882 4900_ $$aTesis de la Universidad de Zaragoza$$v2023-85$$x2254-7606 000125882 500__ $$aPresentado: 11 02 2022 000125882 502__ $$aTesis-Univ. Zaragoza, , 2022$$bZaragoza, Universidad de Zaragoza$$c2022 000125882 506__ $$aby-nc-nd$$bCreative Commons$$c3.0$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es 000125882 520__ $$aThe improvement of electronic device efficiency is currently based on the miniaturization of existing electronic devices. The manufacturing costs of reducing the size of semiconductor based circuits below 10 nm is unfeasible for companies. To overcome this limitation, other materials are currently being developed to fabricate equivalent electronic circuits with smaller dimensions. In this context, on-surface synthesis (OSS) is a bottom-up manufacturing technique based on the reaction of molecules to achieve a well-defined organic structure. The atomic precision of OSS allows to create functional organic molecules for molecular electronic devices. Scanning probe microscopy techniques are the most common microscopy techniques used to analyze on-surface synthesized structures. In this thesis, we present the synthesis by OSS and characterization by scanning tunneling microscopy (STM) and spectroscopy (STS) techniques of functional nanostructures. The synthesized manganese phthalocyanine (MnPc) includes in the phthalocyanine ring four diarylethylene moieties (DAE). The DAE moiety is an optically active group. This organo-metallic complex with optically active groups and the Mn in its structure could work as a magneto-optical transducer. We have successfully induced reversible switches with the STM tip between the assigned open and closed configurations of the DAE moiety. The other organic structures synthesized by OSS studied in this thesis are chiral graphene nanoribbons (ch-GNRs) on Ag(001). Combining STM and STS techniques we have studied the evolution of the electronic structure of ch-GNRs depending on their width and length. Furthermore, when the ch-GNRs are relocated on top of MgO monoloayers grown on the same Ag(001) substrate by means of atomic manipulation, a combination of charge transfer and electronic localization gives rise to a critical discretization of the extended edge states. This causes unprecedented long life times of the ribbon’s electronic states and spin splitting of the frontier orbitals ascribed to electron-electron correlations. Finally, we have evaluated the suitability of the ch-GNR/MgO monolayer/Ag(001) system as a molecular spin polarized transistor.<br /> 000125882 520__ $$a<br /> 000125882 521__ $$97076$$aPrograma de Doctorado en Física 000125882 6531_ $$aespectroscopia molecular 000125882 6531_ $$asíntesis de macromoléculas 000125882 6531_ $$afísica molecular 000125882 700__ $$aSerrate Donoso, David$$edir. 000125882 700__ $$aLanglais, Véronique$$edir. 000125882 7102_ $$aUniversidad de Zaragoza$$b 000125882 830__ $$9488 000125882 8560_ $$fcdeurop@unizar.es 000125882 8564_ $$s72077971$$uhttps://zaguan.unizar.es/record/125882/files/TESIS-2023-085.pdf$$zTexto completo (eng) 000125882 909CO $$ooai:zaguan.unizar.es:125882$$pdriver 000125882 909co $$ptesis 000125882 9102_ $$a$$b 000125882 980__ $$aTESIS