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Preparation of three-dimensional leaflike cobalt microcrystals and decoration of their surface with silver nanoparticles

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Abstract

Three-dimensional leaflike metallic cobalt microcrystals with radiating arrangement from each individual centers were successfully synthesized via a hydrothermal reduction approach. Time-dependent experiments were carried out to verify the rational growth mechanism of the obtained leaflike products, in which a morphology transformation from cobalt hydroxide hexagonal nanoplates to dendritic cobalt crystals and end with leaflike cobalt products was observed. Structure characterizations suggest that this transformation is associated with diffraction-limited aggregation, oriented attachment, and Ostwald ripening. XRD measurement indicates that the cobalt products exhibit a combination of hexagonal-close-packed (hcp) and face-centered-cubic (fcc) crystalline character. The products exhibit a remarkable enhanced coercivity of 193.8 Oe compared against bulk cobalt due to the shape anisotropy and hcp crystalline structure. The effect of different solvents on morphological and magnetic properties of the product was also validated. These leaflike cobalt crystals were further used as substrates to decorate their surface with Ag nanoparticles by transmetallation reaction. These Ag-modified cobalt leaves could have the potential application value in fields of magnetically recyclable catalysts and antibacterial materials.

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References

  • Abes JI, Cohen RE, Ross CA (2003) Selective growth of cobalt nanoclusters in domains of block copolymer films. Chem Mater 15:1125–1131

    Article  CAS  Google Scholar 

  • Cao H, Xu Z, Sang H, Sheng D, Tie CY (2001) Template synthesis and magnetic behavior of an array of cobalt nanowires encapsulated in polyaniline nanotubes. Adv Mater 13:121–123

    Article  CAS  Google Scholar 

  • Chambers A, Rodriguez NM, Baker RTK (1996) Influence of silver addition on the catalytic behavior of cobalt. J Phys Chem 100:4229–4236

    Article  CAS  Google Scholar 

  • De Biasi E, Zysler RD, Ramos CA (2005) Surface anisotropy and surface-core interaction in Co-Ni-B and Fe-Ni-B dispersed amorphous nanoparticles. Phys Rev B 71:104408

    Article  Google Scholar 

  • Frey NA, Peng S, Cheng K, Sun S (2009) Magnetic nanoparticles: synthesis, functionalization, and applications in bioimaging and magnetic energy storage. Chem Soc Rev 38:2532–2542

    Article  CAS  Google Scholar 

  • Grass RN, Athanassiou EK, Stark WJ (2007) Covalently functionalized cobalt nanoparticles as a platform for magnetic separations in organic synthesis. Angew Chem Int Ed 46:4909–4912

    Article  CAS  Google Scholar 

  • Knez M, Bittner AM, Boes F, Wege C, Jeske H, Maiβ E, Kern K (2003) Biotemplate synthesis of 3-nm nickel and cobalt nanowires. Nano Lett 3:1079–1082

    Article  CAS  Google Scholar 

  • Lee W, Kim MG, Choi J, Park JI, Ko SJ, Oh SJ, Cheon J (2005) Redox-transmetalation process as a generalized synthetic strategy for core-shell magnetic nanoparticles. J Am Chem Soc 127:16090–16097

    Article  CAS  Google Scholar 

  • Li D, Thompson RS, Bergmann G, Lu JG (2008) Template-based synthesis and magnetic properties of cobalt nanotube arrays. Adv Mater 20:4575–4578

    Article  CAS  Google Scholar 

  • Liu Z, Chang PC, Chang CC, Galaktionov E, Bergmann G, Lu JG (2008a) Shape anisotropy and magnetization modulation in hexagonal cobalt nanowires. Adv Funct Mater 18:1573–1578

    Article  Google Scholar 

  • Liu XM, Gao WL, Miao SB, Ji BM (2008b) Versatile fabrication of dendritic cobalt microstructures using CTAB in high alkali media. J Phys Chem Solids 69:2665–2669

    Article  CAS  Google Scholar 

  • Mandal S, Rojas RM, Amarilla JM, Calle P, Kosova NV, Anufrienko VF, Rojo JM (2002) High temperature Co-doped LiMn2O4-based spinels. Structural, electrical, and electrochemical characterization. Chem Mater 14:1598–1605

    Article  CAS  Google Scholar 

  • Martínez B, Obradors X, Balcells L, Rouanet A, Monty C (1998) Low temperature surface spin-glass transition in γ-Fe2O3 nanoparticles. Phys Rev Lett 80:181–184

    Article  Google Scholar 

  • Oganov AR, Martoňák R, Laio A, Raiteri P, Parrinello M (2005) Anisotropy of earth’s D″ layer and stacking faults in the MgSiO3 post-perovskite phase. Nature 438:1142–1144

    Article  CAS  Google Scholar 

  • Park JI, Cheon J (2001) Synthesis of “solid solution” and “core-shell” type cobalt-platinum magnetic nanoparticles via transmetalation reactions. J Am Chem Soc 123:5743–5746

    Article  CAS  Google Scholar 

  • Puntes VF, Zanchet D, Erdonmez CK, Alivisatos AP (2002) Synthesis of hcp-Co nanodisks. J Am Chem Soc 124:12874–12880

    Article  CAS  Google Scholar 

  • Qiao R, Zhang XL, Qiu R, Kim JC, Kang YS (2007a) Preparation of magnetic hybrid copolymer-cobalt hierarchical hollow spheres by localized Ostwald ripening. Chem Mater 19:6485–6491

    Article  CAS  Google Scholar 

  • Qiao R, Zhang XL, Qiu R, Li Y, Kang YS (2007b) Fabrication of superparamagnetic cobalt nanoparticles-embedded block copolymer microcapsules. J Phys Chem C 111:2426–2429

    Article  CAS  Google Scholar 

  • Ram S, Frankwicz PS (2001) Granular GMR sensors of Co-Cu and Co-Ag nanoparticles synthesized through a chemical route using NaBH4. Phys Status Solidi A 188:1129–1140

    Article  CAS  Google Scholar 

  • Sahu RK, Ray AK, Mishra T, Pathak LC (2008) Microwave-assisted synthesis of magnetic Ni wire from a metal-organic precursor containing Ni(II) and triethanolamine. Cryst Growth Des 8:3754–3760

    Article  CAS  Google Scholar 

  • Soumare Y, Garcia C, Maurer T, Chaboussant G, Ott F, Fiévet F, Piquemal JY, Viau G (2009) Kinetically controlled synthesis of hexagonally close-packed cobalt nanorods with high magnetic coercivity. Adv Funct Mater 19:1971–1977

    Article  CAS  Google Scholar 

  • Sun S, Murray CB (1999) Synthesis of monodisperse cobalt nanocrystals and their assembly into magnetic superlattices. J Appl Phys 85:4325–4330

    Article  CAS  Google Scholar 

  • Teo JJ, Chang Y, Zeng HC (2006) Fabrication of hollow nanocubes of Cu2O and Cu via reductive self-assembly of CuO nanocrystals. Langmuir 22:7369–7377

    Article  CAS  Google Scholar 

  • Wang X, Yuan F, Hu P, Yu L, Bai L (2008a) Self-assembled growth of hollow spheres with octahedron-like Co nanocrystals via one-pot solution fabrication. J Phys Chem C 112:8773–8778

    Article  CAS  Google Scholar 

  • Wang B, Fei GT, Zhou Y, Wu B, Zhu X, Zhang L (2008b) Controlled growth and phase transition of silver nanowires with dense lengthwise twins and stacking faults. Cryst Growth Des 8:3073–3076

    Article  CAS  Google Scholar 

  • Wang C, Han X, Zhang X, Hu S, Zhang T, Wang J, Du Y, Wang X, Xu P (2010) Controlled synthesis and morphology-dependent electromagnetic properties of hierarchical cobalt assemblies. J Phys Chem C 114:14826–14830

    CAS  Google Scholar 

  • Winnischofer H, Rocha TCR, Nunes WC, Socolovsky LM, Knobel M, Zanchet D (2008) Chemical synthesis and structural characterization of highly disordered Ni colloidal nanoparticles. ACS Nano 2:1313–1319

    Article  CAS  Google Scholar 

  • Wu H, Zhang R, Liu X, Lin D, Pan W (2007) Electrospinning of Fe, Co, and Ni nanofibers: synthesis, assembly, and magnetic properties. Chem Mater 19:3506–3511

    Article  CAS  Google Scholar 

  • Zhu Y, Yang Q, Zheng H, Yu W, Qian Y (2005) Flower-like cobalt nanocrystals by a complex precursor reaction route. Mater Chem Phys 91:293–297

    Article  CAS  Google Scholar 

  • Zhu LP, Xiao HM, Zhang WD, Yang Y, Fu SY (2008) Synthesis and characterization of novel three-dimensional metallic Co dendritic superstructures by a simple hydrothermal reduction route. Cryst Growth Des 8:1113–1118

    Article  CAS  Google Scholar 

Download references

Acknowledgments

This work is financially supported by the Natural Science Foundation of Zhejiang Province, China (Grant No. Y4090636), Science and Technology Research Project of Jinhua (Grant No. 2010-1-069), Youth Foundation of Zhejiang Normal University (Grant No. KJ20090122), and Doctoral Start-up Foundation of Zhejiang Normal University (Grant No. ZC304009096).

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Authors and Affiliations

  1. College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, 321004, China

    Ru Qiao

  2. ARC Center of Excellence for Electromaterials Science, Department of Materials Engineering, Monash University, Clayton, 3800, Australia

    Xiao Li Zhang

  3. College of Mathematics Physics and Information Engineering, Zhejiang Normal University, Jinhua, 321004, China

    Lanlan Zhu

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  1. Ru Qiao
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  2. Xiao Li Zhang
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  3. Lanlan Zhu
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Correspondence to Ru Qiao.

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Qiao, R., Zhang, X.L. & Zhu, L. Preparation of three-dimensional leaflike cobalt microcrystals and decoration of their surface with silver nanoparticles. J Nanopart Res 13, 3843–3852 (2011). https://doi.org/10.1007/s11051-011-0322-2

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  • DOI: https://doi.org/10.1007/s11051-011-0322-2

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