Analytical and Bioanalytical Chemistry

, Volume 409, Issue 27, pp 6379–6386 | Cite as

Functionalization of MgZnO nanorod films and characterization by FTIR microscopic imaging

  • Yuan Chen
  • Qihong Zhang
  • Carol Flach
  • Richard Mendelsohn
  • Elena Galoppini
  • Pavel Ivanoff Reyes
  • Keyang Yang
  • Rui Li
  • Guangyuan Li
  • Yicheng Lu
Research Paper

Abstract

Metal organic chemical vapor deposition grown films consisting of MgxZn1-xO (4% < x < 5%) nanorod arrays (MgZnOnano) were functionalized with 11-azidoundecanoic acid (1). The MgZnOnano was used instead of pure ZnO to take advantage of the etching resistance of the MgZnOnano during the binding and subsequent sensing device fabrication processes of sensor devices, while the low Mg composition level ensures that selected ZnO properties useful for sensors development, such as piezoelectricity, are retained. Compound 1 was bound to the MgZnOnano surface through the carboxylic acid group, leaving the azido group available for click chemistry and as a convenient infrared spectroscopy (IR) probe. The progress of the functionalization with 1 was characterized by FTIR microscopic imaging as a function of binding time, solvents employed, and MgZnOnano morphology. Binding of 1 was most stable in solutions of 3-methoxypropionitrile (MPN), a non-protic polar solvent. This occurred first in μm-scale islands, then expanded to form a rather uniform layer after 22 h. Binding in alcohols resulted in less homogenous coverage, but the 1/MgZnOnano films prepared from MPN were stable upon treatment with alcohols at room temperature. The binding behavior was significantly dependent on the surface morphology of MgZnOnano.

Graphical abstract

The functionalization of MgZnO nanorod films with a click-ready linker and its dependence on bidning conditions and morphology has been studied by FTIR microscopic imaging using the azido group as the IR tag

Keywords

Zinc oxide Magnesium zinc oxide Surface functionalization FTIR microscopic imaging 

Notes

Acknowledgements

The authors gratefully acknowledge support of this research by the National Science Foundations through a NSF-CBET collaborative research grant (Grant Number 1264488) and NSF-CBET (Grant Number 1264508).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interests.

Supplementary material

216_2017_577_MOESM1_ESM.pdf (1.1 mb)
ESM 1 (PDF 1176 kb)

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Yuan Chen
    • 1
  • Qihong Zhang
    • 1
  • Carol Flach
    • 1
  • Richard Mendelsohn
    • 1
  • Elena Galoppini
    • 1
  • Pavel Ivanoff Reyes
    • 2
  • Keyang Yang
    • 2
  • Rui Li
    • 2
  • Guangyuan Li
    • 2
  • Yicheng Lu
    • 2
  1. 1.Department of Chemistry, RutgersThe State University of New JerseyNewarkUSA
  2. 2.Department of Electrical and Computer Engineering, RutgersThe State University of New JerseyPiscatawayUSA

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