Highly concentrated single-chain atomic crystal LiMo₃Se₃ solution using ion-exchange chromatography

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Lithium molybdenum selenide (LiMo3Se3) nanowires are promising materials.
• Aggregation of nanowires in solution limits their applications.

Purpose of the Study:

• To improve the dispersibility and stability of LiMo3Se3 nanowires in aqueous solutions.
• To investigate the effect of ion exchange on nanowire aggregation.

Main Methods:

• Ion-exchange chromatography was employed to replace lithium ions with protons in LiMo3Se3.
• Characterization of nanowire dispersibility and aggregation in aqueous solutions.

Main Results:

• Successful replacement of lithium ions with protons was achieved.
• The proton-exchanged nanowires exhibited enhanced dispersibility.
• Aggregation and re-bundling of nanowires were prevented in aqueous solutions, even at high concentrations (1 mg mL-1).

Conclusions:

• Ion-exchange chromatography is an effective method for enhancing the stability of LiMo3Se3 nanowires.
• Protonation of (Mo3Se3-)∞ chains improves their colloidal properties in water.