Anisotropic growth of gas–liquid precipitated ceria mesocrystals to wires several micrometers in length. Issue 43 (6th July 2018)

• Record Type: Journal Article
• Authors: Kubota, Yuta; Kishi, Tetsuo; Yano, Tetsuji; Matsushita, Nobuhiro
• Is Part Of: RSC advances. Volume 8:Issue 43(2018)
• Page Start: 24370
• Page End: 24375
• Publication Date: 2018-07-06
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra05362f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : CeO2 wires several micrometers in length were formed through anisotropic growth of mesocrystals by oriented attachment on {111} surfaces. Abstract : Ceria (CeO2 ) wires with lengths of 6 μm and diameters of tens of nanometers are fabricated through the anisotropic growth of mesocrystals. In the gas–liquid precipitation process, an aqueous Ce(NO3 )3 solution is used as a starting material and NH3 gas is used to induce CeO2 precipitation at the gas–liquid interface. CeO2 mesocrystals, formed by this process at 60 °C, grow in the direction of 〈011〉 into micrometer length wires exposing {001} and {011} on their side walls. It is shown that the initial pH of the starting material solution is a key parameter to attain anisotropic growth of the CeO2 mesocrystals. We thus propose the formation mechanism of micrometer length-CeO2 wires from mesocrystals.