Facile control of morphological characteristics of magnetite aggregates (nFe(3)O(4)) by the addition of bifunctional ligands
- Authors
- Kim, Sung-Eun; Lee, Sang-Wha
- Issue Date
- Dec-2012
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- bifunctional diamines; chain length; crosslinking; magnetite aggregates
- Citation
- PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, v.209, no.12, pp.2600 - 2604
- Journal Title
- PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
- Volume
- 209
- Number
- 12
- Start Page
- 2600
- End Page
- 2604
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/15989
- DOI
- 10.1002/pssa.201228206
- ISSN
- 1862-6300
- Abstract
- We demonstrated a facile method to control magnetite clusters with different size and surface morphology by adding bifunctional diamines. First, citrate-capped magnetites (C-Fe3O4) were prepared by adding citrate ions into ferrofluid during the coprecipitation process. The resulting C-Fe3O4 was subsequently treated by diamine molecules with different chain lengths (C-4, C-8, C-12), consequently leading to the formation of diamine-linked magnetite aggregates (D-nFe(3)O(4)) with different size and surface morphology. The longer chain length of diamines increased the particle size of D-nFe(3)O(4) due to the enhanced crosslinking between C-Fe3O4. The excessive addition of C-4 and C-12 diamines induced the significant morphological changes from irregular-shaped C-Fe3O4 to spherical and rod-shaped D-nFe(3)O(4), respectively. Furthermore, D-nFe(3)O(4) retained their initial magnetism under a strong oxidative process, implicating the potential application to recyclable catalyst or active electrode materials in Li-ion batteries. (C) 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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