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primary topic: Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light

Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light
type: Article
abstract: Custom design of organic and biological surfaces and soft matter lithography are important issues of modern nanotechnology and physical chemistry of interfaces. An important tool in this regard is ultraviolet (UV) light which can be used for controlled modification and patterning of organic and biological surfaces. In this context, the effect of UV light on alkanethiolate (AT) self-assembled monolayers (SAMs) on gold substrates was studied, with a particular emphasis on its wavelength dependence. The experiments were first performed for the most basic system of non-substituted AT SAMs which exhibited qualitatively similar photooxidation behavior at UV wavelength variation from 254 to 375 nm but a strong decrease of the photooxidation cross-section with increasing wavelength. Based on these results, the possibility of UV-promoted exchange reaction (UVPER) with non-substituted AT SAMs as the primary matrix and azide-substituted ATs as substituents was tested and successfully realized, resulting in the fabrication of mixed SAMs with variable density of the azide tail groups, capable of the subsequent click reaction with various kinds of molecules and functional moieties with alkynyl group. Such a click reaction with several representative substituents was demonstrated. Further, the above approach was extended to oligo(ethylen glycole) substituted AT SAMs serving as protein repelling primary matrix. Combining UVPER and the subsequent click reaction with a biotin-bearing substituent, biorepulsive templates with controlled density of the docking sites for the specific adsorption of biotin-complementary proteins such as avidin and streptavidin were prepared and successfully tested regarding their non-specific and specific protein affinity. This approach was extended to UV lithography, resulting in preparation of custom-designed, gradient protein-adhesion patterns. Finally, based on the results for the OEG-AT SAMs, the effect of UV light on protein-repelling poly(ethylen gl…
date: 2016
author list: authors
type: EPrint
type: DoctoralThesisEPrint
is part of: repository
has document: Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (PDF)
has document: Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (Other)
subject: 540 Chemie
subject: 660 Technische Chemie

Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (PDF)
type: Document
has file: PHD thesis of Rui Yan.pdf
has part: PHD thesis of Rui Yan.pdf

Rui Yan
type: Person
given name: Rui
family name: Yan

Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (Other)
type: Document
is version of: Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (PDF)
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has part: indexcodes.txt

Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (Other)
type: Document
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Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (Other)
type: Document
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Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (Other)
type: Document
is version of: Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (PDF)
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Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (Other)
type: Document
is version of: Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (PDF)
is volatile version of: Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light (PDF)
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primary topic: Modification of Self-Assembled Monolayers and Hydrogel Nanomembranes by Ultraviolet Light

540 Chemie
type: Concept
preferred label: 540 Chemistry and allied sciences @en

660 Technische Chemie
type: Concept
preferred label: 660 Chemical engineering @en