Please use this identifier to cite or link to this item:
Title: Mechanical properties of C-60 thin films at the air-water interface
Authors: Santhosh, V.
Voggu, R.
Chaturbedy, P.
Ganapathy, Rajesh
Rao, C. N. R.
Keywords: Chemistry
Materials Science
Soft Glassy Materials
Field-Effect Transistors
Liquid/Liquid Interface
Issue Date: 2016
Publisher: Pergamon-Elsevier Science Ltd
Citation: Santhosh, V.; Voggu, R.; Chaturbedy, P.; Ganapathy, R.; Rao, C. N. R., Mechanical properties of C-60 thin films at the air-water interface. Carbon 2016, 96, 1-5
Abstract: Understanding the mechanical properties of ultra-thin films formed by the self-assembly of molecules/nanoparticles/colloids at fluid-fluid interfaces is central to many technological applications. Here, we have carried out interfacial rheology measurements to systematically investigate the concentration dependent viscoelastic response of 2D films of Fullerene C-60 at the air-water interface. With increasing C-60 concentration, amplitude sweep measurements show that the films undergo a transition from viscoelastic liquid-like to viscoelastic solid-like behaviour. Interestingly, for high C-60 concentrations's, the loss modulus G '' reaches a maximum before the onset of power-law shear-thinning in G', the storage modulus, and G ''. The power-law exponents have a ratio 2. This response is typical of systems that show soft glassy behaviour. We also observe a power-law increase in G' and G '' at low frequencies in the frequency response measurements and a transition from Newtonian to shear-thinning behaviour, with increasing shear rate, in steady shear measurements. Our results are in qualitative agreement with the phenomenological soft glassy rheology model. (C) 2015 Elsevier Ltd. All rights reserved.
Description: Restricted Access
ISSN: 0008-6223
Appears in Collections:Research Articles (Rajesh Ganapathy)
Research Papers (Prof. C.N.R. Rao)

Files in This Item:
File Description SizeFormat 
  Restricted Access
1.11 MBAdobe PDFView/Open Request a copy

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.