title: Single-crystalline α-Fe2O3 oblique nanoparallelepipeds: high-yield synthesis, growth mechanism and structure enhanced gas-sensing properties.
abstract: In this paper, single-crystalline α-Fe2O3 oblique nanoparallelepipeds are fabricated in high yield via a facile surfactant-free hydrothermal method, which involves oriented aggregation and Ostwald ripening. The obtained nanocrystals have exposed facets of {012}, {01-4} and {-210} with a rhombohedral α-Fe2O3 structure. The gas sensors based on the as-synthesized α-Fe2O3 nanostructures exhibit high sensitivity, short recovery time, and good reproducibility in ethanol and acetone. The superiority of the gas-sensing properties of the obtained nanostructures should be attributed to the surface structure of the nanocrystals. The as-prepared α-Fe2O3 nanocrystals are significant for exploiting their other applications in the future.
authors.affiliation: College of Chemistry and Materials Science, Anhui Key Laboratory of Functional Molecular Solids, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu, 241000, PR China.
authors.forename: Xuelian
authors.initials: X
authors.lastname: Li
authors.forename: Wenjing
authors.initials: W
authors.lastname: Wei
authors.forename: Shaozhen
authors.initials: S
authors.lastname: Wang
authors.forename: Long
authors.initials: L
authors.lastname: Kuai
authors.forename: Baoyou
authors.initials: B
authors.lastname: Geng
mesh_terms: D003460:Crystallization; D005290:Ferric Compounds / Q000737:chemistry*; D005740:Gases / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D056951:Photoelectron Spectroscopy
chemical_list: D005290:Ferric Compounds; D005740:Gases; C000499:ferric oxide