Time-dependent complexation of glucose-reduced gold nanoparticles with octadecylamine Langmuir monolayers

Murali Mayya, K. ; Jain, Nirmesh ; Gole, Anand ; Langevin, Dominique ; Sastry, Murali (2004) Time-dependent complexation of glucose-reduced gold nanoparticles with octadecylamine Langmuir monolayers Journal of Colloid and Interface Science, 270 (1). pp. 133-139. ISSN 0021-9797

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jcis.2003.10.018

Abstract

We report on the reduction of aqueous chloroaurate ions by glucose to form gold nanoparticles of uniform size. We further demonstrate the complexation of these particles with octadecylamine (ODA) monolayers at the air-water interface. Pressure-area (Π-A) isotherms as a function of time of complexation revealed a significant expansion of the monolayer. Surface pressure variation with time for constant areas after spreading of the monolayer was carried out to observe the kinetics of complexation of the colloidal particles at the interface. The kinetics of complexation of the particles at the interface was also monitored by Brewster angle microscopy (BAM) measurements. Langmuir-Blodgett films of the particles complexed with ODA were formed at a subphase pH of 9 onto different substrates. Quartz crystal microgravimetry (QCM) was used to quantify the amount of particles deposited per immersion cycle of the quartz crystal. The LB films were further characterized by UV-vis and transmission electron microscopy (TEM) measurements. TEM measurements indicate a close packed and equidistant arrangement of colloidal particles in the LB film, probably due to hydrogen-bonding interactions.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Langmuir-Blodgett Films; Nanoparticles; Gold; Electrostatic Interactions; Hydrogen Bonding
ID Code:47126
Deposited On:06 Jul 2011 14:18
Last Modified:06 Jul 2011 14:18

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