Komal, N;
Malik, Z;
Ali, NZ;
Chaudhary, AJ;
(2019)
Synthesis, characterization and properties of hierarchically assembled antimony oxyhalides nanonetworks.
Materials Research Express
, 6
(6)
, Article 065035. 10.1088/2053-1591/ab0da9.
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Abstract
The novel synthesis route has been developed for hierarchically structured; nanorods and nanosheets of Sb4O5Cl2 from a single precursor, with dimension range between 57–90 nm. X-ray powder diffraction analysis confirmed the monoclinic crystal symmetry in P21/c (14) with structure type Sb4O5Cl2 for both forms; the nanorods and nanosheets. Rietveld refinements and crystallite size investigations of the powder patterns revealed significant enhancement in intensity with subtle variation in the lattice parameters and crystallite size decrease in case of nanosheets in comparison to the nanorods assembly. Through scanning electron microscopy, a composition commensurate to Sb4O5Cl2 at% with averaged dimensions; dia. ∼90 nm, l ∼ 2 μm for nanorods and dia. ∼50–150 nm for nanosheets got corroborated. Owing to the quantum confinement a band gap widening was observed while moving from bulk to nano regime, i.e. 3.25, 3.31 and 3.34 eV, for bulk, nanosheets, and nanorods, respectively. In the case of nanosheets, the highest value of dielectric constant was observed, i.e. 87, as compared to nanorods and the bulk, i.e. 40 and 35.5, respectively. The nanosheets also showed the highest value of dielectric and tangent loss with an increase in frequency due to the least crystallite size of these nanonetworks. Nanosheets depicted the higher AC conductivity at low frequency due to the alignment of the charges but its value decreases at the higher frequency due to lack of time for charge reorientation. The hopping phenomenon was observed in all three cases with the most prominent one in bulk case at higher frequencies.
| Type: | Article |
|---|---|
| Title: | Synthesis, characterization and properties of hierarchically assembled antimony oxyhalides nanonetworks |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1088/2053-1591/ab0da9 |
| Publisher version: | https://doi.org/10.1088/2053-1591/ab0da9 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10212251 |
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