Publications

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Peer-reviewed Publications

* indicates RIT graduate students   ^ indicates RIT undergraduate students

9. M. Grant*, B. Fingler^, N. Buchanan*, P. Padmanabhan, ‘Coil-helix block copolymers can exhibit divergent thermodynamics in the disordered phase’, Journal of Chemical Theory and Computation, accepted (2023).

Left shows illustration of variable space (chirality on x-axis and chemical disparity on y-axis). Image on right shows free energy difference for different models of varying pitch.

8. S. M. Fenton, P. Padmanabhan, B. K. Ryu, T. D. Nguyen, R. N. Zia, M. E. Helgeson, ‘Minimal conditions for solidification and thermal processing of colloidal gels’, The Proceedings of the National Academy of Sciences, 120, 25, e2215922120.

Image showing the non-equilibrium phase diagram with volume fraction on x-axis and temperature on the y-axis. The phase diagram is comprised of seven zones formed by the intersection of the equilibrium vapor-liquid dome and non-equilibrium gel line

7. N. Buchanan*, J. Provenzano^, P. Padmanabhan, 'A tunable, particle-based model for the diverse conformations exhibited by chiral homopolymers', Macromolecules (2022).
Axes shows dihedral and angular setpoints. Images show illustrative range of helical conformations pertaining to those setpoints.

6. N. Buchanan*, K. Browka^, L. Ketcham^, H. Le^, P. Padmanabhan, 'Conformational and topological correlations in non-frustrated triblock copolymers with homopolymers', Soft Matter (2020).
Image showing ternary phase diagram of a triblock copolymer with additional homopolymer. Complex networks, particularly, the gyroid, are stabilized by addition of homopolymer.

5. P. Padmanabhan, R. N. Zia, 'Gravitational collapse of colloidal gels: Non-equilibrium phase separation driven by osmotic pressure', Soft Matter, 14, 3265 (2018).
Snapshot of a collapsing gel with solvent pores below the interface and supernatant above the interface. The interface is not uniform or flat, but is several colloidal diameters wide.

4. Y. Sun, P. Padmanabhan, M. Misra, F. A. Escobedo, 'Molecular dynamics simulation of thermotropic bolaamphiphiles with a swallow-tail lateral chain: Formation of cubic network phases', Soft Matter, 13, 8542 (2017).
Snapshots of complex phases in bolaamphiphiles. Top row shows molecular configurations. Bottom row shows skeletal graphs.

 

Prior to joining RIT

 3. P. Padmanabhan, F. J. Martinez-Veracoechea, F. A. Escobedo, 'Computation of free-energies of cubic bicontinuous phases for blends of diblock copolymer and selective homopolymer', Macromolecules, 49, 5232 (2016). 

Snapshot of three different networks of increasing complexity. Networks contain a block copolymer with homopolymers in the interior of the networks.

2. P. Padmanabhan, M. Chavis, C. K. Ober, F. A. Escobedo, 'Phase behavior of PMMA-b-PHEMA with solvents methanol and THF: modelling and comparison to the experiment', Soft Matter, 10, 6172 (2014). 

Ternary phase diagram comparison between theory and experiment

1. P. Padmanabhan, F. J. Martinez-Veracoechea, J. C. Araque, F. A. Escobedo, 'A theoretical and simulation study of the self-assembly of a binary blend of diblock copolymers', Journal of Chemical Physics, 136, 234905 (2012).

Outreach and Dissemination

2. P. Padmanabhan, 'A broader view: The need for better standards for etiquette and safety at conferences', AIChE CoMSEF newsletter, June 2020. 

1. P. Padmanabhan, S. Daniel, 'On CBE Women and on how we developed W.O.M.E.N. at Cornell University', ACM-W Connections (newsletter), May 2014.