Phase control and formation mechanism of new-phase layer-structured rhombohedral In3Se4 hierarchical nanostructures

Han, Guang and Chen, Zhi-Gang and Yang, Lei and Cheng, Lina and Drennan, John and Zou, Jin (2013) Phase control and formation mechanism of new-phase layer-structured rhombohedral In3Se4 hierarchical nanostructures. Crystal Growth and Design, 13 (11). pp. 5092-5099. ISSN 1528-7483


New layer-structured rhombohedral In3Se4 hierarchical nanostructures, assembled by thin nanosheets with a thickness of ∼20 nm, are controllably synthesized by an ethylenediaminetetraacetic acid (EDTA) and ascorbic acid (AA) assisted solvothermal method in a solvent of deionized water (DIW) and ethylene glycol (EG). Detailed structural and chemical characterizations, using transmission electron microscopy and X-ray diffraction with Rietveld refinement, reveal that the new In3Se4 phase crystallizes in a layered rhombohedral structure (space group: R3̄m) with lattice parameters of a = 3.962 ± 0.001 Å and c = 39.59 ± 0.01 Å and with layers consisting of Se-In-Se-In-Se-In-Se. Through systematic investigation, the key synthesis parameters, namely, the EDTA/In mole ratio, DIW/EG volume ratio, AA dosage, and reaction temperature, are found to play vital roles in the formation of such rhombohedral hierarchical nanostructures. The investigation of intermediate products shows that the In3Se4 hierarchical nanostructures are formed by the reaction between Se microspheres and In precursors. This study provides a key method to large-scale fabrication of such a new In3Se4 phase for potential applications.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 19 Jun 2017 23:38
Last Modified: 19 Jun 2017 23:38
Uncontrolled Keywords: chemical characterization; formation mechanism; hierarchical nanostructures; intermediate product; large-scale fabrication; reaction temperature; rhombohedral structures; synthesis parameters; crystal lattice; solid state physics; organic compounds; chemical products generally; chemical reactions; chemistry; nanotechnology; optical devices and systems; water treatment techniques
Fields of Research : 03 Chemical Sciences > 0306 Physical Chemistry (incl. Structural) > 030606 Structural Chemistry and Spectroscopy
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030302 Nanochemistry and Supramolecular Chemistry
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Identification Number or DOI: 10.1021/cg401269p

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