Unknown

Dataset Information

0

Crystal growth control of rod-shaped ε-Fe2O3 nanocrystals.

ABSTRACT: Herein we report crystal growth control of rod-shaped ε-Fe2O3 nanocrystals by developing a synthesis based on the sol-gel technique using β-FeO(OH) as a seed in the presence of a barium cation. ε-Fe2O3 nanocrystals are obtained over a wide calcination temperature range between 800 °C and 1000 °C. A low calcination temperature (800 °C) provides an almost cubic rectangular-shaped ε-Fe2O3 nanocrystal with an aspect ratio of 1.4, whereas a high calcination temperature (1000 °C) provides an elongated rod-shaped ε-Fe2O3 nanocrystal with an aspect ratio of 3.3. Such systematic anisotropic growth of ε-Fe2O3 is achieved due to the wide calcination temperature in the presence of barium cations. The surface energy and the anisotropic adsorption of barium on the surface of ε-Fe2O3 can explain the anisotropic crystal growth of rod-shaped ε-Fe2O3 along the crystallographic a-axis. The present work may provide important knowledge about how to control the anisotropic crystal shape of nanomaterials.

SUBMITTER: Tokoro H 

PROVIDER: S-EPMC9057426 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

Json Xml
altmetric image

Publications

Crystal growth control of rod-shaped ε-Fe<sub>2</sub>O<sub>3</sub> nanocrystals.

Tokoro Hiroko H   Fukui Junpei J   Watanabe Koki K   Yoshikiyo Marie M   Namai Asuka A   Ohkoshi Shin-Ichi SI  

RSC advances 20201029 65

Herein we report crystal growth control of rod-shaped ε-Fe<sub>2</sub>O<sub>3</sub> nanocrystals by developing a synthesis based on the sol-gel technique using β-FeO(OH) as a seed in the presence of a barium cation. ε-Fe<sub>2</sub>O<sub>3</sub> nanocrystals are obtained over a wide calcination temperature range between 800 °C and 1000 °C. A low calcination temperature (800 °C) provides an almost cubic rectangular-shaped ε-Fe<sub>2</sub>O<sub>3</sub> nanocrystal with an aspect ratio of 1.4, wher  ...[more]

Similar Datasets

Unknown Structural behavior of laser-irradiated γ-Fe<sub>2</sub>O<sub>3</sub> nanocrystals dispersed in porous silica matrix : γ-Fe<sub>2</sub>O<sub>3</sub> to α-Fe<sub>2</sub>O<sub>3</sub> phase transition and formation of ε-Fe<sub>2</sub>O<sub>3</sub>.
| S-EPMC5101921 | biostudies-literature
Unknown Correlation between crystal structure and magnetism in PLD grown epitaxial films of ε-Fe<sub>2</sub>O<sub>3</sub> on GaN.
| S-EPMC8856044 | biostudies-literature
Unknown Systematic control of α-Fe<sub>2</sub>O<sub>3</sub> crystal growth direction for improved electrochemical performance of lithium-ion battery anodes.
| S-EPMC5629383 | biostudies-literature
Unknown Magnetic hyperthermia with ε-Fe<sub>2</sub>O<sub>3</sub> nanoparticles.
| S-EPMC9055867 | biostudies-literature
Unknown Contrasting mechanisms of growth in two model rod-shaped bacteria.
| S-EPMC5467245 | biostudies-literature
Unknown Epitaxial Growth of Diamond-Shaped Au1/2Ag1/2CN Nanocrystals on Graphene.
| S-EPMC8706316 | biostudies-literature
Unknown Diffusion doping of cobalt in rod-shape anatase TiO<sub>2</sub> nanocrystals leads to antiferromagnetism.
| S-EPMC9417846 | biostudies-literature
Unknown Flexible ε-Fe<sub>2</sub>O<sub>3</sub>-Terephthalate Thin-Film Magnets through ALD/MLD.
| S-EPMC7685534 | biostudies-literature
Unknown A Wire-Shaped Supercapacitor in Micrometer Size Based on Fe<sub>3</sub>O<sub>4</sub> Nanosheet Arrays on Fe Wire.
| S-EPMC6199038 | biostudies-literature
Unknown A reexamination of active and passive tumor targeting by using rod-shaped gold nanocrystals and covalently conjugated peptide ligands.
| S-EPMC2964428 | biostudies-literature