A method for preparing a germanium nanowire

Germanium nanowires were prepared in one step on ITO substrates by a constant potential electrodeposition method, which solved the problems of metal catalysts and high temperature and low pressure required in the existing technology. This method enabled the simple and low-cost preparation of germanium nanowires and yielded porous germanium nanowires.

CN116516421BActive Publication Date: 2026-05-29JILIN NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN NORMAL UNIV
Filing Date
2023-06-12
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing methods for preparing germanium nanowires require metal catalysts and high temperature and low pressure, resulting in complex and environmentally unfriendly processes. They also often require templates or light sources, making it difficult to achieve low-cost and simple preparation.

Method used

A constant potential electrodeposition method was adopted, using the non-toxic ionic liquid 1-ethyl-3-methylimidazolium trifluoromethanesulfonic acid ([EMIm]TfO) as a solvent and GeCl4 as an electrolyte to prepare germanium nanowires on ITO substrates in one step, avoiding metal catalysts and high temperature and low pressure. Liquid seeds were formed on the substrate through GeClx/TfO-complex, realizing template-free and light source-free growth.

Benefits of technology

A simple and low-cost preparation of germanium nanowires without templates or metal catalysts was achieved, avoiding the requirements of high temperature and low pressure, simplifying the preparation steps, and obtaining porous germanium nanowires.

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Abstract

The present application belongs to the technical field of nanowire preparation, and provides a preparation method of germanium nanowire. The preparation method uses non-toxic and non-polluted green ionic liquid 1-ethyl-3-methyl imidazole trifluoromethyl sulfonic acid ([EMIm]TfO) as a solvent, and GeCl4 as an electrolyte. The [EMIm]TfO ionic liquid is easy to decompose in the electrochemical reaction process due to weak cation-anion interaction, and the chloride ion in GeCl4 is also easy to separate from the molecule. Therefore, in the process of electrodeposition, the TfO generated after the decomposition of the [EMIm]TfO ionic liquid combines with GeCl4 to generate a GeClx / TfO complex, the GeClx / TfO complex is adsorbed on the ITO substrate to form a liquid seed; then, the GeCl4 precursor is electrochemically reduced and dissolved into the liquid seed; finally, the supersaturation of germanium in the liquid seed triggers the final crystal nucleation and the growth of nanowire. ‑ x ‑ ‑ ​​​​
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