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A calorimetric investigation of the assembly of gold nanorods to form necklaces

Varghese, Neenu and Vivekchand, S. R. C. and Govindaraj, Achutharao and Rao, C. N. R. (2007) A calorimetric investigation of the assembly of gold nanorods to form necklaces. CHEMICAL PHYSICS LETTERS, 450 . pp. 340-344.

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Abstract

Interaction of gold nanorods with cysteine as well as 3-mercaptopropionic acid (MPA) has been investigated by isothermal titration calorimetry (ITC), in combination with electronic absorption spectroscopy and electron microscopy. The assembly process with MPA shows two steps, the first due to the binding of MPA to gold nanorods through the sulfur atom, and the second due to assembly of the MPA capped gold nanorods through the formation of cyclic hydrogen bonded dimers between the MPA molecules. In the case of cysteine only a single step is observed in ITC, due to the binding of the molecules to gold nanorods.

Item Type:Article
Subjects:Physical Science > Nanophysics
Material Science > Nanochemistry
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:2916
Deposited By:JNCASR
Deposited On:20 Jan 2009 11:15
Last Modified:08 Apr 2009 15:27

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