Controlled growth of single-crystalline, nanostructured dendrites and snowflakes of a-Fe2O3: influence of the surfactant on the morphology and investigation of morphology dependent magnetic properties
SCIE
SCOPUS
- Title
- Controlled growth of single-crystalline, nanostructured dendrites and snowflakes of a-Fe2O3: influence of the surfactant on the morphology and investigation of morphology dependent magnetic properties
- Authors
- Bharathi, S; Nataraj, D; Seetha, M; Mangalaraj, D; Ponp; ian, N; Masuda, Y; Senthil, K; Yong, K
- Date Issued
- 2010-02
- Publisher
- RSC
- Abstract
- Single-crystalline, nanostructured dendrites, single and double-layered snowflakes of hematite (alpha-Fe2O3) were synthesized by a well controlled, surfactant-assisted hydrothermal reaction of K-3[Fe(CN)(6)]. By varying the preparatory conditions such as precursor concentration and type of surfactant, we could establish precise control on the morphology of the sample. X-Ray diffraction, Raman analysis and X-ray photoelectron spectroscopic studies have confirmed that the as grown morphologies were hematite. Dendrites were obtained due to weak dissociation of the precursor and controlled diffusion of alpha-Fe2O3 nanoparticles under non-equilibrium conditions which attach and grow along certain preferred crystal facets. In the presence of a surfactant, single and double-layered snowflakes were formed. The type of surfactant and the nature of micelle formation were proposed to be the key factor for the observed snowflakes and the single or double-layered growth. Magnetic studies have shown morphology dependent magnetic properties with variation in the coercivity values for dendrites, single and double-layered snowflakes.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/10070
- DOI
- 10.1039/B910550F
- ISSN
- 1466-8033
- Article Type
- Article
- Citation
- CRYSTENGCOMM, vol. 12, no. 2, page. 373 - 382, 2010-02
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