Nature of the effective interaction between dendrimers

Mandal, Taraknath and Dasgupta, Chandan and Maiti, Prabal K (2014) Nature of the effective interaction between dendrimers. In: JOURNAL OF CHEMICAL PHYSICS, 141 (14).

PDF jou_che_phy_141-14_2014.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

We have performed fully atomistic classical molecular dynamics simulations to calculate the effective interaction between two polyamidoamine dendrimers. Using the umbrella sampling technique, we have obtained the potential of mean force (PMF) between the dendrimers and investigated the effects of protonation level and dendrimer size on the PMF. Our results show that the interaction between the dendrimers can be tuned from purely repulsive to partly attractive by changing the protonation level. The PMF profiles are well-fitted by the sum of an exponential and a Gaussian function with the weight of the exponential function dominating over that of the Gaussian function. This observation is in disagreement with the results obtained in previous analytic C. Likos, M. Schmidt, H. Lowen, M. Ballauff, D. Potschke, and P. Lindner, Macromolecules 34, 2914 (2001)] and coarse-grained simulation I. Gotze, H. Harreis, and C. Likos, J. Chem. Phys. 120, 7761 (2004)] studies which predicted the effective interaction to be Gaussian. (C) 2014 AIP Publishing LLC.

Item Type:	Journal Article
Publication:	JOURNAL OF CHEMICAL PHYSICS
Additional Information:	Copy right for this article belongs to the AMER INST PHYSICS, CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	14 Dec 2014 10:43
Last Modified:	14 Dec 2014 10:43
URI:	http://eprints.iisc.ac.in/id/eprint/50441

Actions (login required)

View Item