Individualization and Stabilization of Zinc Oxide Nanorods by Covalent Functionalization with Positively Charged Catechol Derivatives

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Burger A, Srikantharajah R, Peukert W, Hirsch A
Zeitschrift: Chemistry - A European Journal
Verlag: Wiley-VCH Verlag
Jahr der Veröffentlichung: 2017
Band: 23
Heftnummer: 68
Seitenbereich: 17257-17268
ISSN: 0947-6539


Abstract

We present the formation of individualized and stabilized zinc oxide (ZnO) nanorods by functionalization with positively charged catechol derivatives by means of ligand exchange reactions. The electrosteric stabilization of ZnO nanorods was studied using two catechol derivatives, introducing either three(1) or six(2) pH independent positive charges per molecule and sterically demanding groups onto the surface. ZnO nanorods providing initially acetate (Ac) or 2-[2-(2-methoxyethoxy)-ethoxy]acetic acid (TODA) ligands on their surface were used. The ligand exchange was performed by using mono and mixed functionalization approaches, utilizing either exclusively the positively charged catechols or mixtures of the latter with small commercially available catechol derivatives, namely 4-methylcatechol (Me-cat), 4-tert-butylcatechol (tBu-cat), and dopamine hydrochloride (Dop). Using a combination of various analytical methods such as zeta potential, dynamic light scattering (DLS), UV/Vis, and scanning electron microscopy (SEM) measurements we found that the initial surfactants on the nanorods surface, the number of positive charges per molecule, the steric demand, and the added amount of the catechol derivative strongly influence the colloidal behavior of the nanorods. Stable suspensions containing individualized ZnO nanorods were successfully formed upon functionalization of ZnO-TODA nanorods with 30monolayers (MLs) of the higher charged catechol (2), as well as using mixtures of 20/10 and 18/10MLs of 2/Dop.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Burger, Alexandra Dr.
Lehrstuhl für Organische Chemie II
Hirsch, Andreas Prof. Dr.
Lehrstuhl für Organische Chemie II
Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Srikantharajah, Rubitha
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials


Forschungsbereiche

B Nanoelectronic Materials
Exzellenz-Cluster Engineering of Advanced Materials
A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Burger, A., Srikantharajah, R., Peukert, W., & Hirsch, A. (2017). Individualization and Stabilization of Zinc Oxide Nanorods by Covalent Functionalization with Positively Charged Catechol Derivatives. Chemistry - A European Journal, 23(68), 17257-17268. https://dx.doi.org/10.1002/chem.201702109

MLA:
Burger, Alexandra, et al. "Individualization and Stabilization of Zinc Oxide Nanorods by Covalent Functionalization with Positively Charged Catechol Derivatives." Chemistry - A European Journal 23.68 (2017): 17257-17268.

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Zuletzt aktualisiert 2019-14-03 um 12:56