Show simple item record

dc.contributor.authorBenoit, Denise N.
Zhu, Huiguang
Lilierose, Michael H.
Verm, Raymond A.
Ali, Naushaba
Morrison, Adam N.
Fortner, John D.
Avendano, Carolina
Colvin, Vicki L.
dc.date.accessioned 2017-08-02T14:52:15Z
dc.date.available 2017-08-02T14:52:15Z
dc.date.issued 2012
dc.identifier.citation Benoit, Denise N., Zhu, Huiguang, Lilierose, Michael H., et al.. "Measuring the Grafting Density of Nanoparticles in Solution by Analytical Ultracentrifugation and Total Organic Carbon Analysis." Analytical Chemistry, 84, no. 21 (2012) American Chemical Society: 9238-9245. https://doi.org/10.1021/ac301980a.
dc.identifier.urihttps://hdl.handle.net/1911/96164
dc.description.abstract Many of the solution phase properties of nanoparticles, such as their colloidal stability and hydrodynamic diameter, are governed by the number of stabilizing groups bound to the particle surface (i.e., grafting density). Here, we show how two techniques, analytical ultracentrifugation (AUC) and total organic carbon analysis (TOC), can be applied separately to the measurement of this parameter. AUC directly measures the density of nanoparticle–polymer conjugates while TOC provides the total carbon content of its aqueous dispersions. When these techniques are applied to model gold nanoparticles capped with thiolated poly(ethylene glycol), the measured grafting densities across a range of polymer chain lengths, polymer concentrations, and nanoparticle diameters agree to within 20%. Moreover, the measured grafting densities correlate well with the polymer content determined by thermogravimetric analysis of solid conjugate samples. Using these tools, we examine the particle core diameter, polymer chain length, and polymer solution concentration dependence of nanoparticle grafting densities in a gold nanoparticle–poly(ethylene glycol) conjugate system.
dc.language.iso eng
dc.publisher American Chemical Society
dc.rights This is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.
dc.title Measuring the Grafting Density of Nanoparticles in Solution by Analytical Ultracentrifugation and Total Organic Carbon Analysis
dc.type Journal article
dc.citation.journalTitle Analytical Chemistry
dc.citation.volumeNumber 84
dc.citation.issueNumber 21
dc.identifier.digital Measuring_Grafting_Density
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1021/ac301980a
dc.identifier.pmcid PMC4538977
dc.identifier.pmid 22967239
dc.type.publication post-print
dc.citation.firstpage 9238
dc.citation.lastpage 9245


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record