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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/123

Title: Effect of water and air–water interface on the structural modification of Ni-arachidate Langmuir–Blodgett films
Authors: Kundu, Sarathi
Raychaudhuri, A K
Keywords: Langmuir monolayer
LB films
Nickel arachidate
Surface modification
Subphase effect
X-ray reflectivity
Out-of-plane structure
Issue Date: 2011
Publisher: Journal of Colloid and Interface Science
Citation: Sarathi Kundu and A. K. Raychaudhuri, Effect of water and air-water interface on the structural modification of Ni-Arachidate Langmuir-Blodgett films, Journal of Colloid and Interface Science, 2011, 353, 316
Abstract: Nickel arachidate (NiA) Langmuir–Blodgett (LB) films have been deposited on hydrophilic Si(0 0 1) substrates by three (up–down–up) and five (up–down–up–down–up) strokes. During deposition, substrates were kept inside the water subphase for different times after each down stroke. Structural information of all the LB films have been obtained from X-ray reflectivity (XRR) studies. One and two symmetric monolayer(SML) was deposited on top of the asymmetric monolayer (AML) in three and five stokes respectively. All the preformed LB films were then used to go through the air–water interface with the same speed that was used at the time of film deposition. Structural information obtained from the XRR studies show that mainly the top layer density decreases after passing through the air–water interface but the layered structure remains the same. Information obtained from both the XRR and atomic force microscopy(AFM) studies suggest that molecules peeled from the top SML layer do not reincorporate with the LB film through tail–tail hydrophobic interaction. Our study shows that NiA LB film has better stability compared with cadmium arachidate LB film inside the water subphase without forming any out-of-plane molecular reorganization.
URI: http://hdl.handle.net/123456789/123
Appears in Collections:2011

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