Abstract
Planar brushes formed by end-grafted semiflexible polyampholyte chains, each chain containing an equal number of positively and negatively charged monomers, are studied using molecular dynamics simulations. Keeping the length of the chains fixed, the dependences of the average brush thickness and equilibrium statistics of the brush conformations on the grafting density and the salt concentration are obtained with various sequences of charged monomers. When similarly charged monomers of the chains are arranged in longer blocks, the average brush thickness is smaller and the dependence of brush properties on the grafting density and the salt concentration is stronger. With such long blocks of similarly charged monomers, the anchored chains bond to each other in the vicinity of the grafting surface at low grafting densities and buckle toward the grafting surface at high grafting densities.
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Y. Hong, R.L. Legge, S. Zhang, P. Chen, Biomacromolecules. 4, 1434 (2003).
S. Jun, Y. Hong, H. Imamura, B.-Y. Ha, J. Bechhoefer, P. Chen, Biophys. J. 87, 1249 (2004).
R. Messina, Eur. Phys. J. E 22, 325 (2007).
A.V. Dobrynin, R.H. Colby, M. Rubinstein, J. Polym. Sci., Part B: Polym. Phys. 42, 3513 (2004).
J.B. Imbert, J.M. Victor, N. Tsunekawa, Y. Hiwatari, Phys. Lett. A 258, 92 (1999).
A. Baumketner, H. Shimizu, M. Isobe, Y. Hiwatari, J. Phys.: Condens. Matter 13, 10279 (2001).
Z. Wang, M. Rubinstein, Macromolecules 39, 5897 (2006).
M. Castelnovo, J.F. Joanny, Macromolecules 35, 4531 (2002).
N.P. Shusharina, E.B. Zhulina, A.V. Dobrynin, M. Rubinstein, Macromolecules 38, 8870 (2005).
G.Z. Zheng, G. Meshitsuka, A. Ishizu, J. Polym. Sci., Part B: Polym. Phys. 33, 867 (1995).
G. Ehrlich, P. Doty, J. Am. Chem. Soc. 76, 3764 (1954).
C.L. McCormick, L.C. Salazar, Macromolecules 25, 1896 (1992).
J.M. Corpart, F. Candau, Macromolecules 26, 1333 (1993).
C.M. Wijmans, E.B. Zhulina, Macromolecules 26, 7214 (1993).
E. Lindberg, C.J. Elvingson, Chem. Phys. 114, 6343 (2001).
J. Klos, T. Pakula, Macromolecules 37, 8145 (2004).
A.S. Almusallam, D.S. Sholl, Nanotechnology 16, S409 (2005).
P. Pincus, Macromolecules 24, 2912 (1991).
E.B. Zhulina, O.V. Borisov, Macromolecules 29, 2618 (1996).
E.B. Zhulina, J.K. Wolterink, O.V. Borisov, Macromolecules 33, 4945 (2000).
O.V. Borisov, T.M. Birstein, E.B. Zhulina, J. Phys. II 2, 63 (1992).
E.B. Zhulina, O.V. Borisov, J. Chem. Phys. 107, 5952 (1997).
A. Naji, R.R. Netz, C. Seidel, Eur. Phys. J. E 12, 223 (2003).
H. Ahrens, S. Forster, C.A. Helm, N.A. Kumar, A. Naji, R.R. Netz, C. Seidel, J. Phys. Chem. B 108, 16870 (2004).
A. Naji, C. Seidel, R.R. Netz, Adv. Polym. Sci. 198, 149 (2006).
F.S. Csajka, C. Seidel, Macromolecules 33, 2728 (2000).
C. Seidel, Macromolecules 36, 2536 (2003).
H. Fazli, R. Golestanian, P.L. Hansen, M.R. Kolahchi, Europhys. Lett. 73, 429 (2006).
O.V. Borisov, T.M. Birstein, E.B. Zhulina, J. Phys. II 1, 521 (1991).
N.P. Shusharina, P. Linse, Eur. Phys. J. E 4, 399 (2001).
N.P. Shusharina, P. Linse, Eur. Phys. J. E 6, 147 (2001).
A. Akinchina, N.P. Shusharina, P. Linse, Langmuir 20, 10351 (2004).
A. Akinchina, P. Linse, Langmuir 23, 1465 (2007).
P. Linse, J. Chem. Phys. 126, 114903 (2007).
H.J. Limbach, A. Arnold, B.A. Mann, C. Holm, Comput. Phys. Commun. 174, 704 (2006).
G.S. Grest, K. Kremer, Phys. Rev. A 33, 3628 (1986).
R. Strebel, R. Sperb, Mol. Simul. 27, 61 (2001).
A. Arnold, C. Holm, Comput. Phys. Commun. 148, 327 (2002).
M. Baratlo, H. Fazli, unpublished.
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Baratlo, M., Fazli, H. Molecular dynamics simulation of semiflexible polyampholyte brushes--The effect of charged monomers sequence. Eur. Phys. J. E 29, 131–138 (2009). https://doi.org/10.1140/epje/i2009-10458-x
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DOI: https://doi.org/10.1140/epje/i2009-10458-x