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Phase control for indium oxide nanoparticles
- Source :
- Nielsen, I G, Sommer, S & Iversen, B B 2021, ' Phase control for indium oxide nanoparticles ', Nanoscale, vol. 13, no. 7, pp. 4038-4050 . https://doi.org/10.1039/d0nr08587a
- Publication Year :
- 2021
-
Abstract
- The indium oxides, c-In2O3, h-In2O3, InOOH and In(OH)3, constitute an important class of wide band gap semiconductors. Synthesis of any indium oxide phase involves manoeuvring in a complex matrix of process parameters, and some phases are only obtained through controlled phase transformations. Considering the widespread use of indium oxide semiconductors it is restrictive that no coherent picture exists of the formation mechanisms of individual phases and phase transformations between them. Here we access the indium oxide system through solvothermal synthesis and/or powder calcinations, and we use in situ X-ray scattering in combination with thermal analysis to investigate the complex phase relations. This allows us to unravel synthesis pathways for the different indium oxide phases, and the insight is used to develop procedures for scalable continuous flow solvothermal synthesis. Direct formation of crystalline nanomaterials from precursor solutions was observed for In(OH)3, InOOH and cubic c-In2O3, while formation of hexagonal h-In2O3 requires thermal decomposition of InOOH. The in situ X-ray scattering data reveal new phase transformations from In(OH)3 to InOOH, and from InOOH to c-In2O3. Interestingly, solvothermal synthesis conditions facilitate different reactions mechanisms than dry powder calcinations, and both In(OH)3 and InOOH have different transformations under dry and wet conditions. This journal is.
- Subjects :
- CORUNDUM-TYPE
Materials science
Thermal decomposition
Solvothermal synthesis
Oxide
chemistry.chemical_element
Nanoparticle
HYDROXIDE
IN(OH)(3)
INOOH
Nanomaterials
chemistry.chemical_compound
Chemical engineering
chemistry
X-RAY-DIFFRACTION
Phase (matter)
General Materials Science
CRYSTAL-STRUCTURE
NEUTRON
Thermal analysis
GROWTH-KINETICS
Indium
TRANSITION
IN2O3
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Nielsen, I G, Sommer, S & Iversen, B B 2021, ' Phase control for indium oxide nanoparticles ', Nanoscale, vol. 13, no. 7, pp. 4038-4050 . https://doi.org/10.1039/d0nr08587a
- Accession number :
- edsair.doi.dedup.....87c432f18c4b9757d7db6675c0ad4908