Bhattacharya, R. ; Basu, J.K. (2013) Microscopic dynamics of nanoparticle monolayers at air–water interface Journal of Colloid and Interface Science, 396 . pp. 69-74. ISSN 0021-9797
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Official URL: http://doi.org/10.1016/j.jcis.2013.01.003
Related URL: http://dx.doi.org/10.1016/j.jcis.2013.01.003
Abstract
We present results of surface mechanical and particle tracking measurements of nanoparticles trapped at the air–water interface as a function of their areal density. We monitor both the surface pressure (Π) and isothermal compression modulus (ϵ) as well as the dynamics of nanoparticle clusters, using fluorescence confocal microscopy while they are compressed to very high density near the two dimensional close packing density Φ ∼ 0.82. We observe non-monotonic variation in both ϵ and the dynamic heterogeneity, characterized by the dynamical susceptibility χ4 with Φ, in such high density monolayers. We provide insight into the underlying nature of such transitions in close packed high density nanoparticle monolayers in terms of the morphology and flexibility of these soft colloidal particles. We discuss the significance our results in the context of related studies on two dimensional granular or colloidal systems.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier B.V. |
Keywords: | Nanoparticle at Interface; Langmuir Monolayer; Interfacial Rheology; Particle Tracking; Jamming Transition; Dynamical Heterogeneity. |
ID Code: | 116100 |
Deposited On: | 22 Mar 2021 07:09 |
Last Modified: | 22 Mar 2021 07:09 |
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