ACS Omega ACS Omega Single-Molecule and π–π-Stacked Dimer Electron Transport in Carbazole and Folded Bicarbazole Derivatives in Molecular Junctions Alrehaili Adel Amer Davidson Ross J. Hurtado-Gallego Juan Alajmi Asma Alwhaibi Noorah Batsanov Andrei S. Martin Santiago Universidad de Zaragoza Cea Pilar Universidad de Zaragoza Bryce Martin R. Agraït Nicolás Ismael Ali K. Lambert Colin J. 2025 research-article