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Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies
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Tuneable-by-design copper oxide nanoparticles in ionic liquid nanofluids.

Claire Boudie1, Manuel Maréchal2, Guillaume Ah-Lung3

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|November 8, 2023
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Summary
This summary is machine-generated.

This study synthesized copper oxide nanoparticles (CuO-NPs) in an ionic liquid. Different precursor anion chain lengths influenced nanoparticle size, with longer chains yielding larger CuO-NPs.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Inorganic Chemistry

Background:

  • Ionic liquids offer unique reaction environments for nanomaterial synthesis.
  • Controlling nanoparticle size and morphology is crucial for their applications.
  • Copper oxide nanoparticles (CuO-NPs) have diverse industrial and biomedical uses.

Purpose of the Study:

  • To synthesize copper oxide nanoparticles (CuO-NPs) using an ionic liquid and copper(II) carboxylate precursors.
  • To investigate the effect of precursor anion chain length on CuO-NP size.
  • To characterize the formation and properties of the synthesized nanoparticles.

Main Methods:

  • Synthesis of CuO-NPs in an ionic liquid ([C2MIm][CH3CO2]) with copper(II) carboxylate precursors.
  • Thermal treatment to induce nanoparticle formation, monitored by color change.
  • Crystallography and UV-Vis spectroscopy for transition monitoring.
  • Transmission Electron Microscopy (TEM) and Small-Angle X-ray Scattering (SAXS) for particle characterization.

Main Results:

  • Heating induced a color change from blue to red, signifying copper salt coordination changes and CuO-NP formation.
  • The length of the carboxylate anion in the copper(II) precursor directly influenced the size of the resulting CuO-NPs.
  • Copper(II) acetate precursors yielded small CuO(I,II) clusters (<1 nm).
  • Copper(II) octanoate precursors resulted in CuO-NPs of 10-25 nm.
  • Copper(II) butanoate precursors produced larger CuO-NPs ranging from 10-61 nm.

Conclusions:

  • The choice of copper(II) carboxylate precursor, specifically the anion chain length, is a critical factor in controlling the size of CuO-NPs synthesized in ionic liquids.
  • This method provides a tunable approach for producing CuO-NPs with specific size distributions for targeted applications.