Versatile gold-polymer nanointerfaces probed by GISAXS

Murtaza Bohra, Arun Showry Bandaru, Panagiotis Grammatikopoulos, Vidyadhar Singh*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


An increasing trend toward integration of polymers in microelectronics and organic electronics has recently boosted research focusing in metal-polymer interfaces. These two materials differ vastly, with the former forming dense, crystalline, cohesive structures and the latter forming open structures bound together by weak van der Waals forces. As a result, there is dire need to assess their surface features (e.g., roughness) and correlate them with corresponding growth parameters, as metal-polymer interfaces are mainly determined by the preparation process. Here, we report a laboratory-based grazing-incidence small-angle x-ray scattering (GISAXS) study on distinct gold-polymer interfaces fabricated with different growth mechanisms, utilizing in-plane and oblique sputter geometries. GISAXS provided an improved analytic scheme for the buried surface in free-standing 2D gold-polymer nanosheets (with 19% porosity) revealing their fractal structure (Porod slope: −1.71). Two quantitative approaches (Height-Height Correlation and Power Spectral Density functions) were used to describe rough surfaces characterized by Atomic Force Microscopy (AFM) in consort with GISAXS data; different correlation length dependencies on growth time were revealed for gold rough surfaces grown on bare and polymerized Si. The results are considered pertinent to interfacial nanoscience and engineering, enabling statistical data collection from large surface areas, in a fast and nondestructive manner.

Original languageEnglish
Article number100297
JournalMaterials Today Chemistry
StatePublished - Sep 2020
Externally publishedYes


  • AFM
  • Free standing nanosheet
  • Gold-nanostructures
  • SAXS
  • Sputtering


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