Nanoparticle-Imprinted Polymers for Size-Selective Recognition of Nanoparticles.

Citation:

Shlomit Kraus-Ophir, Witt, Julia , Wittstock, Gunther , and Mandler, Daniel. . 2014. “Nanoparticle-Imprinted Polymers For Size-Selective Recognition Of Nanoparticles.”. Angew. Chem., Int. Ed.angewandte Chemie, International Edition, 53, Pp. 294 - 298.

Abstract:

Citrate-stabilized gold nanoparticles 15 nm and 33 nm in diam. were transferred concomitantly with a monolayer of pos. charged polyaniline by Langmuir-Blodgett transfer at pH 5 onto a conducting indium-doped tin oxide (ITO) support. Films consisting of one to three layers of polyaniline with thicknesses of 1-3 nm were prepd. and characterized by SEM, at. force microscopy (AFM), and XPS. After electrooxidn. of the Au nanoparticles in 0.1 M KCl, cavities were left behind in the film that could be analyzed by SEM. These cavities were able to recapture analyte nanoparticles from a soln. of pH 10 and showed size-exclusion properties. The amt. of nanoparticles taken up by the cavities was conveniently analyzed by measuring the charge assocd. with the electrooxidn. of these particles in 0.1 M KCl after the film had been rinsed with water. The size-exclusion properties improved with the no. of Langmuir-Blodgett layers transferred. [on SciFinder(R)]