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Bartosz Andrzej Grzybowski
첨단연성물질 연구단
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Electrostatic Titrations Reveal Surface Compositions of Mixed, On-Nanoparticle Monolayers Comprising Positively and Negatively Charged Ligands

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Title
Electrostatic Titrations Reveal Surface Compositions of Mixed, On-Nanoparticle Monolayers Comprising Positively and Negatively Charged Ligands
Author(s)
Pillai P.P.; Kowalczyk B.; Pudlo W.J.; Bartosz A. Grzybowski
Publication Date
2016-02
Journal
JOURNAL OF PHYSICAL CHEMISTRY C, v.120, no.7, pp.4139 - 4144
Publisher
AMER CHEMICAL SOC
Abstract
A general-purpose procedure based on electrostatic titrations was developed to determine the compositions of mixed self-assembled monolayers (m-SAMs) of oppositely charged ligands on metal nanoparticles (NPs). In this procedure, nanoparticles of unknown m-SAM compositions and charges are titrated with the positively charged NP standards. These compositions and the differences in the free energies of adsorption of the [+] and [-] are then determined from the points of precipitation at which the overall charge on all NPs is neutralized. The results of the titrations agree well with traditional core-etching/NMR studies. However, the titration-based approach is nondestructive and requires significantly less material than NMR. © 2016 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/2445
ISSN
1932-7447
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > Journal Papers (저널논문)
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