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Bottom-Up Fabrication of Semiconductive Metal-Organic Framework Ultrathin Films

Year: 2018

Journal: Adv. Mater., Volume 30, Nov-08

Authors: Rubio-Gimenez, Victor; Galbiati, Marta; Castells-Gil, Javier; Almora-Barrios, Neyvis; Navarro-Sanchez, Jose; Escorcia-Ariza, Garin; Mattera, Michele; Arnold, Thomas; Rawle, Jonathan; Tatay, Sergio; Coronado, Eugenio; Marti-Gastaldo, Carlos

Organizations: EU (ERC Stg) [Chem-fs-MOF 714122]; Spanish MINECO (Unit of Excellence Maria de Maeztu) [MDM-2015-0538]; Generalitat Valenciana [GV/2016/137]; Spanish MECD; European Union Horizon Marie Curie Actions under the project SPIN2D [H2020/2014-659378]; Generalitat Valenciana; Spanish MINECO for a Ramon y Cajal Fellowship; FPI PhD grant [CTQ2014-59209-P]

Keywords: electrical conductivity; metal-organic frameworks; self-assembled monolayers; ultrathin films

Though generally considered insulating, recent progress on the discovery of conductive porous metal-organic frameworks (MOFs) offers new opportunities for their integration as electroactive components in electronic devices. Compared to classical semiconductors, these metal-organic hybrids combine the crystallinity of inorganic materials with easier chemical functionalization and processability. Still, future development depends on the ability to produce high-quality films with fine control over their orientation, crystallinity, homogeneity, and thickness. Here self-assembled monolayer substrate modification and bottom-up techniques are used to produce preferentially oriented, ultrathin, conductive films of Cu-CAT-1. The approach permits to fabricate and study the electrical response of MOF-based devices incorporating the thinnest MOF film reported thus far (10 nm thick).