Posted in | Surface Analyzers

Ultra-Flat Gold Surfaces

An ultra-flat and pristine gold surface is provided by template-stripped gold chips for research applications, such as biosensor development, scanning electron microscope (SEM) and atomic force microscopy (AFM) and analyses of self-assembled monolayers.

The gold chips are produced by coating the flattest prime-grade silicon wafers available or a newly split mica, without an adhesion layer.

Following this, glass chips measuring 1 x 1 cm2 are epoxy-glued to the gold surface. The gold surface employed by the users is the one that comes in contact with the mica or silicon substrate, and hence, it is ultra-flat and also protected from the air until it is ready to be used.

Ultra-Flat Gold Surfaces

Image Credit: Platypus Technologies LLC

Features and Benefits

  • RMS roughness that approaches atomic flatness
  • Ready to use: Chips do not need cleaning and thus prevent the need for costly cleaning equipment or toxic cleaning solutions
  • Uncontaminated surface: Gold is protected from the air until it is removed from the template, offering a pristine surface that does not contain organics and other kinds of atmospheric contaminants
  • Convenient: With numerous chips for each template, clean, fresh and ultra-flat chips can be prepared within seconds before the next experiment

Ordering Information

All chips are delivered in aluminosilicate glass, 1 x 1 cm. But users can contact Platypus Technologies for alternative chip dimensions.

Comparison with Standard Gold

Ultra-flat and standard gold surfaces were examined by AFM across a randomly chosen 1-µm2 area to evaluate roughness.

Ultra-Flat Gold Surfaces

Image Credit: Platypus Technologies LLC

Surface Orientation

The ultra-flat gold films from Platypus Technologies have an even (111) orientation covering the whole surface area of the chip.

Ultra-Flat Gold Surfaces

Image Credit: Platypus Technologies LLC

Applications

Ultra-flat gold surfaces allow high resolution characterization of self-assembled monolayers (SAM) and single molecules through scanning tunneling microscopy (STM) or AFM. Ultra-flat gold surfaces are perfect for use in single-molecule imaging, self-assembly, DNA origami, nano-photonics and nano-contact printing.

Ultra-flat gold is used in the following studies:

  • C. Ciano et al. “Phonon-Polaritons in flakes of h-BN” Appl. Phys. Lett., 2018.
  • X. Jia et al. “Surface modes of periodic nanopatch metasurface” Optics Express, 2018.
  • H. Wang et al. “Electron tunneling across plasmonic junctions” Phys. Chem., 2017.
  • K. Jimenez et al. “Electronic Conductance through DNA molecules” J. Phys. Chem. A, 2017.
  • M. Sajfutdinow et al. “Patterning of self-assembled monolayer (SAM)” Nanoscale, 2017.
  • G. Akselrod et al. “Enhancement in plasmonic nanoantennas” Nature Photonics, 2014.
  • T. Lee et al. “Construction of RNA-Quantum Dot for Nanoscale Biomemory” ACS Nano, 2015.

Other Equipment by this Supplier

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