Wet formation and structural characterization of quasi-hexagonal monolayers

Research output: Contribution to journalArticle

Researchers

Research units

  • Institute of Catalysis and Surface Chemistry of the Polish Academy of Sciences

Abstract

We have presented a simple and efficient method for producing dense particle monolayers with controlled surface coverage. The method is based on particle sedimentation, manipulation of the particle-substrate electrostatic interaction, and gentle mechanical vibration of the system. It allows for obtaining quasi-hexagonal structures under wet conditions. Using this method, we have produced a monolayer of 3. μm silica particles on a glassy carbon substrate. By optical microscopy, we have determined the coordinates of the particles and surface coverage of the obtained structure to be 0.82. We have characterized the monolayer structure by means of the pair-correlation function and power spectrum. We have also compared the results with those for a 2D hexagonal monolayer and monolayer generated by random sequential adsorption at the coverage 0.50. We have found the surface fractal dimension to be 2.5, independently of the monolayer surface coverage.

Details

Original languageEnglish
Pages (from-to)211-214
Number of pages4
JournalJournal of Colloid and Interface Science
Volume461
Publication statusPublished - 1 Jan 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • Hexagonal monolayer, Pair-correlation function, Particle deposition, Particle sedimentation, Power spectrum

ID: 13575265