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Quantitative Analysis and Efficient Surface Modification of Silica Nanoparticles
Joint Authors
Jung, Hak-Sung
Moon, Doo-Sik
Lee, Jin-Kyu
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-31
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
Aminofunctional trialkoxysilanes such as aminopropyltrimethoxysilane (APTMS) and (3-trimethoxysilylpropyl)diethylenetriamine (DETAS) were employed as a surface modification molecule for generating monolayer modification on the surface of silica (SiO2) nanoparticles.
We were able to quantitatively analyze the number of amine functional groups on the modified SiO2 nanoparticles by acid-base back titration method and determine the effective number of amine functional groups for the successive chemical reaction by absorption measurements after treating with fluorescent rhodamine B isothiocyanate (RITC) molecules.
The numbers of amine sites measured by back titration were 2.7 and 7.7 ea/nm2 for SiO2-APTMS and SiO2-DETAS, respectively, while the numbers of effective amine sites measured by absorption calibration were about one fifth of the total amine sites, namely, 0.44 and 1.3 ea/nm2 for SiO2-APTMS(RITC) and SiO2-DETAS(RITC), respectively.
Furthermore, it was confirmed that the reactivity of amino groups on the surface-modified silica nanoparticles could be maintained in ethanol for more than 1.5 months without showing any significant differences in the reactivity.
American Psychological Association (APA)
Jung, Hak-Sung& Moon, Doo-Sik& Lee, Jin-Kyu. 2012. Quantitative Analysis and Efficient Surface Modification of Silica Nanoparticles. Journal of Nanomaterials،Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-998259
Modern Language Association (MLA)
Jung, Hak-Sung…[et al.]. Quantitative Analysis and Efficient Surface Modification of Silica Nanoparticles. Journal of Nanomaterials No. 2012 (2012), pp.1-8.
https://search.emarefa.net/detail/BIM-998259
American Medical Association (AMA)
Jung, Hak-Sung& Moon, Doo-Sik& Lee, Jin-Kyu. Quantitative Analysis and Efficient Surface Modification of Silica Nanoparticles. Journal of Nanomaterials. 2012. Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-998259
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-998259