Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-25T18:30:50.605Z Has data issue: false hasContentIssue false
  • English
  • Français

Effect of Reflux Time on Nanoparticle Shape

Published online by Cambridge University Press:  19 February 2014

Chandan Srivastava  and
Sushma KVL
Chandan Srivastava*
Affiliation:
Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
Sushma KVL
Affiliation:
Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
*
*Corresponding author. [email protected]
Get access

Abstract

In the present work, Pt nanoparticles were produced from a reaction mixture containing a trace amount of cobalt carbonyl salt acting as a shape inducer. Nanoparticle shape evolution during reaction mixture reflux was monitored by characterizing particles extracted from the reaction mixture at different times. It was observed that 5 min of reflux produced spherical nanoparticles, 30 min of reflux produced cube shaped nanoparticles, and 60 min of reflux produced truncated octahedron morphology nanoparticles. It is illustrated that during nanoparticle synthesis the reflux process can provide energy needed for shape transformation from a metastable cube morphology to a truncated octahedron morphology which is thermodynamically the most stable geometry for fcc crystals. An optimization of the reaction reflux is thus needed for isolating metastable shapes.

Keywords

Pt nanoparticlesshapereaction refluxcube
Type
Materials Applications
Information
Microscopy and Microanalysis , Volume 20 , Issue 3 , June 2014 , pp. 847 - 851
Copyright
© Microscopy Society of America 2014 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Chen, J., Herricks, M., Geissler, M. & Xia, Y. (2004). Single-crystal nanowires of platinum can be synthesized by controlling the reaction rate of a polyol process. J Am Chem Soc 126, 10854–10855.Google Scholar
Chen, W., Sun, S.-G., Zhou, Z.-Y. & Chen, S.-P. (2003). IR optical properties of Pt nanoparticles and their agglomerates investigated by in Situ FTIRS using CO as the probe molecule. J Phys Chem B 107, 9808–9812.CrossRefGoogle Scholar
Chiu, C.Y., Li, Y., Ruan, L., Ye, X., Murray, C.B. & Huang, Y. (2011). Platinum nanocrystals selectively shaped using facet-specific peptide sequences. Nature Chem 3, 393–399.Google Scholar
Herricks, T.J., Chen, J. & Xia, Y. (2004). Polyol synthesis of platinum nanoparticles: control of morphology with sodium nitrate. Nano Lett 4, 2367–2371.Google Scholar
Jiang, W., Kim, B.Y.S., Rutka, J.T. & Chan, W.C.W. (2008). Nanoparticle-mediated cellular response is size-dependent. Nat Nanotechnol 3(3), 145–150.Google Scholar
Lim, S.I., Ojea-Jimenez, I., Varon, M., Casals, E., Arbiol, J. & Puntes, V. (2010). Synthesis of platinum cubes, polypods, cuboctahedrons, and raspberries assisted by cobalt nanocrystals. Nano Lett 10, 964–973.Google Scholar
Mostafa, S., Behafarid, F., Croy, J.R., Ono, L.K., Li, L., Yang, J.C., Frenkel, A.I. & Cuenya, B.R. (2010). Shape-dependent catalytic properties of Pt nanoparticles. J Am Chem Soc 132, 15714–15719.CrossRefGoogle ScholarPubMed
Narayanan, R. & El-Sayed, M.A. (2004). Shape-dependent catalytic activity of platinum nanoparticles in colloidal solution. Nano Lett 4(7), 1343–1348.Google Scholar
Nehl, C.L. & Hafner, J.H. (2008). Shape-dependent plasmon resonances of gold nanoparticles. J Mater Chem 18, 2415–2419.CrossRefGoogle Scholar
Porter, D.A., Easterling, K.E. & Sherif, M.Y. (2009). Phase Transformations in Metal and Alloys, 3rd ed., pp. 115–117. New York: CRC Press.Google Scholar
Srivastava, C., Nikles, D.E. & Thompson, G.B. (2008). Compositional evolution during the synthesis of FePt nanoparticles. J Appl Phys 104(6), 064315.CrossRefGoogle Scholar
Tao, A.R., Habas, S. & Yang, P. (2008). Shape control of colloidal metal nanocrystals. Small 4(3), 310–325.Google Scholar
Teng, X. & Yang, H. (2005). Synthesis of platinum multipods: An induced anisotropic growth. Nano Lett 5, 885–891.Google Scholar
Wang, H., Wang, Y., Zhu, Z., Sapi, A., An, K., Kennedy, G., Michalak, W.D. & Somorjai, G.A. (2013). Influence of size-induced oxidation state of platinum nanoparticles on selectivity and activity in catalytic methanol oxidation in the gas phase. Nano Lett 13, 2976–2979.Google Scholar
Wang, Z.L. (2000). Transmission electron microscopy of shape-controlled nanocrystals and their assemblies. Phys Chem B 104(6), 1153–1175.Google Scholar
Wu, B., Zheng, N. & Fu, G. (2011). Small molecules control the formation of Pt nanocrystals: A key role of carbon monoxide in the synthesis of Pt nanocubes. Chem Commun 47, 1039–1041.CrossRefGoogle ScholarPubMed