Grafted Nanoparticle Penetration Barriers in Polymers: Effect of Entropy

ORAL

Abstract

Understanding the fundamentals of nanoparticle (NP) penetration into soft matter systems is indispensable for numerous applications ranging from targeted nanoparticle-based drug delivery to generating hybrid polymer nanocomposite materials. Hence, it is crucial to identify the parameters which control the extent of NP penetration. Here, we study the penetration of polystyrene-grafted Au nanoparticles (PGNPs) into an entropically/enthalpically coupled soft polymer film. The behaviour of penetration of NPs are two different way, in one case it's penetrating in dispersed manner and in another cases it penetrates in a intact manner.

*The authors thank Center for Nano Science and Engineering (CeNSE), Department of Physics, IISc, funded by Fund for Improvement of S\&T Infrastructure (FIST), Department of Science and Technology (DST), Govt. of India, IISc and Advance Facility for Microscopy and Micro analysis (AFMM), IISc for providing the access to Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). The authors thank Ministry of Human Resources Development (MHRD), SPARC project.

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Publication: [1] Aparna Swain, Nafisa Begam, Sivasurender Chandran, M. S. Bobji and J. K. Basu, "Engineering interfacial entropic effects to generate giant viscosity changes in nanoparticle embedded polymer thin films, Soft Matter 16 4065 (2020).
[2] Nimmi Das A and Swain, A and Begam, N and Bhattacharyya, A and Basu, JK ,"Temperature-Driven Grafted Nanoparticle Penetration into Polymer Melt: Role of Enthalpic and Entropic Interactions" Macromolecules, 53, 8674-8682 (2020).
[3] Nimmi A. Das, Nafisa Begam, Sivasurender Chandran, Aparna Swain, Michael Sprung and Jaydeep Kumar Basu, "Thermal Stability and Dynamics of Soft Nanoparticle Membranes: Role of entropy, enthalpy and Membrane Compressibility.", Soft Matter 10.1039/C9SM01946D (2019)

Presenters

  • Aparna Swain

    • Indian Institute of Science Bangalore

Authors

  • Aparna Swain

    • Indian Institute of Science Bangalore