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On-wire conversion chemistry: engineering solid-state complexity into striped metal nanowires using solution

Mary E Anderson¹, Matthew R Buck, Ian T Sines

¹Department of Chemistry and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.

Journal of the American Chemical Society

|October 8, 2008

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Researchers developed a new solution chemistry method to create multisegment metal nanowires. This technique allows for controllable incorporation of various metal components, offering new possibilities for nanomaterial applications.

Area of Science:

Materials Science
Nanotechnology
Chemistry

Background:

Multisegment template-grown metal nanowires are crucial one-dimensional nanomaterials.
Traditional fabrication via electrodeposition in anodic alumina membranes is versatile.
Existing methods have limitations in precise control over composition and segment length.

Purpose of the Study:

To introduce a novel, simple solution chemistry strategy for fabricating multisegment metal nanowires.
To enable controllable incorporation of multiple metal components with defined lengths and compositions.
To demonstrate the feasibility of on-wire conversion for creating complex multimetal phases.

Main Methods:

Utilizing template-grown metal nanowires confined within membranes.

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Reacting these nanowires with metal salt solutions under reducing conditions.

Employing site-specific diffusion to convert nanowire segments into different metal phases.

Main Results:

Successfully incorporated multimetal components into template-grown metal nanowires.
Achieved controllable lengths and compositions of segments within the nanowires.
Demonstrated the conversion of nanowire tips or entire nanowires into various multimetal phases, specifically platinum-based intermetallic compounds.

Conclusions:

The developed solution chemistry approach offers a simple and effective alternative for multisegment metal nanowire fabrication.
This method provides precise control over segment composition and length, expanding the utility of these nanomaterials.
The on-wire conversion chemistry is feasible and opens avenues for creating advanced nanostructures for diverse applications.