Synthesis of ferromagnetic cobalt nanoparticle tipped CdSe@CdS nanorods: Critical role of Pt-activation

Lawrence J. Hill, Nathaniel E. Richey, Younghun Sung, Philip T. Dirlam, Jared J. Griebel, In Bo Shim, Nicola Pinna, Marc Georg Willinger, Walter Vogel, Kookheon Char, Jeffrey Pyun

Research output: Contribution to journalArticle

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Abstract

The synthesis of a ferromagnetic heterostructured material consisting of a CdSe@CdS nanorod attached to a single dipolar cobalt nanoparticle (CoNP) into a "matchstick" morphology is reported. CdSe@CdS nanorods were modified by an activation reaction with Pt(acac)2 which enabled selective one-sided deposition of a dipolar metallic CoNP-tip via the thermolysis of Co2(CO)8 in the presence of polystyrene ligands. Small (<2 nm) PtNP-tips on CdSe@CdS nanorods were found to be responsible for the selective deposition of CoNP-tips onto one terminus per nanorod. The influence of the Pt-activation step for cobalt tipping was investigated by examination of numerous conditions and characterization of intermediates and materials using transmission electron microscopy and synchrotron X-ray diffraction. This journal is

Original languageEnglish (US)
Pages (from-to)9461-9468
Number of pages8
JournalCrystEngComm
Volume16
Issue number40
DOIs
StatePublished - Oct 28 2014

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    Hill, L. J., Richey, N. E., Sung, Y., Dirlam, P. T., Griebel, J. J., Shim, I. B., Pinna, N., Willinger, M. G., Vogel, W., Char, K., & Pyun, J. (2014). Synthesis of ferromagnetic cobalt nanoparticle tipped CdSe@CdS nanorods: Critical role of Pt-activation. CrystEngComm, 16(40), 9461-9468. https://doi.org/10.1039/c4ce00680a