title: Hybrid N-Butylamine-Based Ligands for Switching the Colloidal Solubility and Regimentation of Inorganic-Capped Nanocrystals.
abstract: We report on a simple and effective technique of tuning the colloidal solubility of inorganic-capped CdSe and CdSe/CdS core/shell nanocrystals (NCs) from highly polar to nonpolar media using n-butylamine molecules. The introduction of the short and volatile organic amine mainly results in a modification of the labile diffusion region of the inorganic-capped NCs, enabling a significant extension of their dispersibility and improving the ability to form long-range assemblies. Moreover, the hybrid n-butylamine/inorganic capping can be thermally decomposed under mild heat treatment, making this approach of surface functionalization well-compatible with a low-temperature, solution-processed device fabrication. Particularly, a field-effect transistor-based on n-butylamine/Ga-I-complex-capped 4.5 nm CdSe NC solids shows excellent transport characteristics with electron mobilities up to 2 cm2/(V·s) and a high current modulation value (>104) at a low operation voltage (<2 V).
authors.affiliation: Physical Chemistry and Center for Advancing Electronics Dresden (cfAED), TU Dresden , Bergstr. 66b, Dresden 01062, Germany.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Sayevich
authors.affiliation: Physical Chemistry and Center for Advancing Electronics Dresden (cfAED), TU Dresden , Bergstr. 66b, Dresden 01062, Germany.
authors.forename: Chris
authors.initials: C
authors.lastname: Guhrenz
authors.affiliation: Semiconductor Physics, TU Chemnitz , Chemnitz D-09107, Germany.
authors.forename: Volodymyr M
authors.initials: VM
authors.lastname: Dzhagan
authors.affiliation: Department of Chemistry and Food Chemistry, Bioanalytical Chemistry, TU Dresden , Bergstr. 66, Dresden 01069, Germany.
authors.forename: Maria
authors.initials: M
authors.lastname: Sin
authors.affiliation: Physical Chemistry and Center for Advancing Electronics Dresden (cfAED), TU Dresden , Bergstr. 66b, Dresden 01062, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Werheid
authors.affiliation: Physical Chemistry and Center for Advancing Electronics Dresden (cfAED), TU Dresden , Bergstr. 66b, Dresden 01062, Germany.
authors.forename: Bin
authors.initials: B
authors.lastname: Cai
authors.affiliation: Department of Inorganic Chemistry, TU Dresden , Bergstr. 66, Dresden 01062, Germany.
authors.forename: Lars
authors.initials: L
authors.lastname: Borchardt
authors.affiliation: Institut für Angewandte Photophysik, TU Dresden , George-Bähr-Str. 1, Dresden 01069, Germany.
authors.forename: Johannes
authors.initials: J
authors.lastname: Widmer
authors.affiliation: Semiconductor Physics, TU Chemnitz , Chemnitz D-09107, Germany.
authors.forename: Dietrich R T
authors.initials: DR
authors.lastname: Zahn
authors.affiliation: Department of Chemistry and Food Chemistry, Bioanalytical Chemistry, TU Dresden , Bergstr. 66, Dresden 01069, Germany.
authors.forename: Eike
authors.identifier: 0000-0003-3511-9899
authors.initials: E
authors.lastname: Brunner
authors.affiliation: Physical Chemistry and Center for Advancing Electronics Dresden (cfAED), TU Dresden , Bergstr. 66b, Dresden 01062, Germany.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Lesnyak
authors.affiliation: Physical Chemistry and Center for Advancing Electronics Dresden (cfAED), TU Dresden , Bergstr. 66b, Dresden 01062, Germany.
authors.forename: Nikolai
authors.identifier: 0000-0002-8827-2881
authors.initials: N
authors.lastname: Gaponik
authors.affiliation: Physical Chemistry and Center for Advancing Electronics Dresden (cfAED), TU Dresden , Bergstr. 66b, Dresden 01062, Germany.
authors.forename: Alexander
authors.initials: A
authors.lastname: Eychmüller
keywords: colloidal CdSe nanocrystals; field-effect transistor; hybrid organic−inorganic ligands; ligand exchange; long-range assembly