title: Large and fast single-crystal resistive humidity sensitivity of metal pnictide halides containing van der Waals host-guest interactions.
abstract: Two new metal pnictide halides, (Hg(9.75)As(5.5))(GaCl4)3 and (Hg13Sb8)(ZnBr4)4, have been prepared by solid-state reactions. Their structures feature 3D cationic host frameworks built of mercury pnictide polyhedra and form 1D tunnels filled with discrete guest halide polyanions; the guests and hosts are assembled by van der Waals interactions. Both complexes exhibit good single-crystal humidity sensitivity, with a humidity sensitivity factor as big as three orders of magnitude, a quick resistance response, fast recovery, and good reproducibility. This study provide a new way to design promising resistive humidity detectors by introducing van der Waals host-guest interactions into their structures.
authors.affiliation: Institute for Quantum Materials and School of Chemical and Materials Engineering, Hubei Polytechnic University, Huangshi 435003 (P.R. China); Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (P.R. China). casjxm@gmail.com.
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Jiang
authors.forename: Zhi-Bo
authors.initials: ZB
authors.lastname: Yan
authors.forename: Dan
authors.initials: D
authors.lastname: Liu
authors.forename: Ke-Feng
authors.initials: KF
authors.lastname: Wang
authors.forename: Guo-Cong
authors.initials: GC
authors.lastname: Guo
authors.forename: Shao-Zhen
authors.initials: SZ
authors.lastname: Li
authors.forename: Jun-Ming
authors.initials: JM
authors.lastname: Liu
keywords: halides; host-guest interactions; humidity sensitivity; pnictides; solid-state reactions