Solution synthesis of conveyor-like MnSe nanostructured architectures with an unusual core/shell magnetic structure. Issue 24 (5th June 2017)

• Record Type: Journal Article
• Authors: Yang, Xinyi; Zhou, Bo; Wei, Yingjin; Zou, Bo
• Is Part Of: CrystEngComm. Volume 19:Issue 24(2017)
• Page Start: 3331
• Page End: 3337
• Publication Date: 2017-06-05
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c7ce00491e
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : 1D WZ-MnSe nanoconveyors with a single-crystalline configuration have been fabricated by a solution-processed colloidal method, which show an unusual core/shell magnetic structure and a large coercive field (300 Oe). Abstract : We report for the first time one-dimensional (1D) wurtzite (WZ) MnSe nanoconveyors with a single-crystalline configuration fabricated by a solution-processed colloidal method. High-resolution transmission electron microscopy (HRTEM) measurements show that the stem of MnSe nanoconveyors grows along the [11̄00] direction, while the teeth grow along the [0001] direction. We find that the initial WZ nanobelts with the [11̄00] growth direction are crucial to the formation of nanoconveyors, whereas the teeth are a result of a self-catalyzed growth process induced by the Mn-terminated (0001) surface. The magnetic measurements suggest that 1D WZ MnSe nanoconveyors consist of an antiferromagnetic core and a ferromagnetic shell below the blocking temperature. Furthermore, the hysteresis measurements indicate that these nanoconveyors have 300 Oe coercive fields, which is attributed to the high surface-to-volume ratio of the nanoconveyors. This facile solution-based strategy can be anticipated to synthesize WZ metal chalcogenide nanomaterials with 1D hierarchical structures, for potential applications from spintronics to photocatalysis.