Writing Silica Structures in Liquid with Scanning Transmission Electron Microscopy

M.W.P. Put, van de, C.C.M. Carcouet, P.H.H. Bomans, H. Friedrich, N. Jonge, de, N.A.J.M. Sommerdijk

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)
212 Downloads (Pure)

Abstract

Silica nanoparticles are imaged in solution with scanning transmission electron microscopy (STEM) using a liquid cell with silicon nitride (SiN) membrane windows. The STEM images reveal that silica structures are deposited in well-defined patches on the upper SiN membranes upon electron beam irradiation. The thickness of the deposits is linear with the applied electron dose. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) demonstrate that the deposited patches are a result of the merging of the original 20 nm-diameter nanoparticles, and that the related surface roughness depends on the electron dose rate used. Using this approach, sub-micrometer scale structures are written on the SiN in liquid by controlling the electron exposure as function of the lateral position.

Original languageEnglish
Pages (from-to)585-590
Number of pages6
JournalSmall
Volume11
Issue number5
DOIs
Publication statusPublished - 2015

Keywords

  • Atomic force microscopy
  • Liquid cells
  • Patterning
  • Scanning electron microscopy
  • Silica nanoparticles
  • STEM

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