Polymerized rodlike nanoparticles with controlled surface charge density

Langmuir : the ACS Journal of Surfaces and Colloids
Tae-Hwan KimSteven R Kline

Abstract

Stable rodlike nanoparticles with highly controlled surface charge density have been developed by the free radical polymerization of the mixture of polymerizable cationic surfactant, cetyltrimethylammonium 4-vinylbenzoate (CTVB), and hydrotropic salt sodium 4-styrenesulfonate (NaSS) in aqueous solution. The surface charge of the polymerized CTVB/NaSS rodlike nanoparticles was controlled by varying the NaSS concentration during the polymerization process, and the charge variation was interpreted in terms of the overcharging effect in colloidal systems. The SANS measurements show that the diameter of the polymerized CTVB/NaSS rodlike nanoparticles is constant at 4 nm and the particle length ranges from 24 to 85 nm, depending on the NaSS concentration. The polymerized particles are longest when the NaSS concentration is 5 mol % which corresponds to the charge inversion or neutral point. The SANS and zeta potential measurements show that the Coulomb interactions between the particles are strongly dependent on the NaSS concentration and the zeta potential of the polymerized CTVB/NaSS nanoparticles changes from positive to negative (+12.8 approximately -44.2 mV) as the concentration of NaSS increases from 0 to 40 mol %. As the NaSS c...Continue Reading

References

Aug 11, 2001·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·R MessinaK Kremer
Dec 19, 2001·Accounts of Chemical Research·D L GinW J Zhou
Sep 24, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Michael J GerberLynn M Walker
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Dec 17, 2004·Journal of the American Chemical Society·Heiko HeerklotzThomas Gutberlet

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Citations

May 28, 2009·Journal of the American Chemical Society·Tae-Hwan KimSung-Min Choi
Mar 29, 2013·The Journal of Chemical Physics·Changwoo DoSung-Min Choi
Jan 21, 2019·Daru : Journal of Faculty of Pharmacy, Tehran University of Medical Sciences·Ali Ahmadi TehraniVahid Ramezani
Dec 5, 2018·Journal of Colloid and Interface Science·Priyanka BiswasSung-Min Choi
Oct 30, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Sun Ju Lee, Moon Jeong Park
May 20, 2020·The Journal of Physical Chemistry Letters·Shin-Hyun KangTae-Hwan Kim

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