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Fabrication of oriented crystals as force measurement tips via focused ion beam and microlithography methods

Journal Article · · Surface and Interface Analysis
DOI:https://doi.org/10.1002/sia.6346· OSTI ID:1422297
 [1];  [2];  [3];  [2]
  1. School of Science, North University of China, Shanxi 030051 China
  2. Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, WA USA
  3. Energy and Environment Directorate, Pacific Northwest National Laboratory, WA USA
Detailed knowledge of the forces between nanocrystals is very crucial for understanding many generic (e.g., random aggregation/assembly and rheology) and specific (e.g., oriented attachment) phenomena at macroscopic length scales, especially considering the additional complexities involved in nanocrystals such as crystal orientation and corresponding orientation-dependent physicochemical properties. Because there are a limited number of methods to directly measure the forces, little is known about the forces that drive the various emergent phenomena. Here we report on two methods of preparing crystals as force measurement tips used in an atomic force microscope (AFM): the focused ion beam method and microlithography method. The desired crystals are fabricated using these two methods and are fixed to the AFM probe using platinum deposition, ultraviolet epoxy, or resin, which allows for the orientation-dependent force measurements. These two methods can be used to attach virtually any solid particles (from the size of a few hundreds of nanometers to millimeters). We demonstrate the force measurements between aqueous media under different conditions such as pH.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL); Energy Frontier Research Centers (EFRC) (United States). Interfacial Dynamics in Radioactive Environments and Materials (IDREAM)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1422297
Report Number(s):
PNNL-SA-126666; 49686
Journal Information:
Surface and Interface Analysis, Journal Name: Surface and Interface Analysis Journal Issue: 1 Vol. 50; ISSN 0142-2421
Publisher:
Wiley
Country of Publication:
United States
Language:
English

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