Transmission electron microscopy and time resolved optical spectroscopy study of the electronic and structural interactions of ZnO nanorods with bovine serum albumin

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Klaumünzer M, Weichsel U, Mackovic M, Spiecker E, Peukert W, Kryschi C, Spiecker E, Mackovic M
Zeitschrift: Journal of Physical Chemistry B
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2013
Band: 117
Heftnummer: 33
Seitenbereich: 9683-9689
ISSN: 1520-6106
eISSN: 1520-5207


Abstract


The adsorption behavior and electronic interactions of bovine serum albumin (BSA) with ZnO nanorod surfaces were investigated using high-resolution transmission electron microscopy as well as stationary and time-resolved optical spectroscopy techniques. Transmission electron microscopy shows that ZnO nanorod surfaces are surrounded by a homogeneous amorphous BSA film with thicknesses between ∼2.5 and 5.0 nm. The electronic structure and adsorption geometry of BSA were examined using high-angle annular dark field scanning transmission electron microscopy combined with electron energy loss spectroscopy. The adsorption process was observed to result into an unfolded conformation of BSA becoming predominantly bound in the side-on orientation at the ZnO surface. This adsorption mode of the BSA molecules allows for a strong interaction with surface states of the ZnO nanorods. This is obvious from its efficient quenching of the defect-center photoluminescence of ZnO. Complementary information of electronic interactions across the ZnO nanorod interface was obtained from femtosecond transient absorption spectroscopy experiments. The rise dynamics of the measured transients revealed altered hole trapping dynamics and, thus, indicated to heterogeneous charge transfer as emerging from adsorbed BSA molecules to defect centers of the ZnO interface. © 2013 American Chemical Society.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Klaumünzer, Martin
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Kryschi, Carola Prof. Dr.
Professur für Physikalische Chemie
Mackovic, Mirza Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Biomaterialien)
Mackovic, Mirza Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Spiecker, Erdmann Prof. Dr.
Professur für Werkstoffwissenschaften (Elektronenmikroskopie)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Weichsel, Ulrike
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik


Zusätzliche Organisationseinheit(en)
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)
Exzellenz-Cluster Engineering of Advanced Materials


Forschungsbereiche

A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials
A2 Nanoanalysis and Microscopy
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Klaumünzer, M., Weichsel, U., Mackovic, M., Spiecker, E., Peukert, W., Kryschi, C.,... Mackovic, M. (2013). Transmission electron microscopy and time resolved optical spectroscopy study of the electronic and structural interactions of ZnO nanorods with bovine serum albumin. Journal of Physical Chemistry B, 117(33), 9683-9689. https://dx.doi.org/10.1021/jp405181u

MLA:
Klaumünzer, Martin, et al. "Transmission electron microscopy and time resolved optical spectroscopy study of the electronic and structural interactions of ZnO nanorods with bovine serum albumin." Journal of Physical Chemistry B 117.33 (2013): 9683-9689.

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Zuletzt aktualisiert 2019-09-04 um 14:50