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Updated: Mar 23, 2026

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Published on: June 18, 2013

Shape-Controlled Deterministic Assembly of Nanowires.

Yunlong Zhao, Jun Yao, Lin Xu¹

¹State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology , Wuhan 430070, China.

|March 22, 2016

Summary

This summary is machine-generated.

Researchers developed a novel method for precisely shaping and positioning nanowires using patterned U-shaped trenches. This technique enables large-scale, deterministic assembly of one-dimensional nanomaterials for advanced nanodevices.

Keywords:

Silicon nanowires bioelectronics elastic deformation field-effect transistors nanoelectronics nanowire arrays

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Area of Science:

Materials Science
Nanotechnology
Device Engineering

Background:

One-dimensional nanomaterials like nanowires offer unique electronic and optical properties.
Deterministic assembly of nanowires is crucial for fabricating nanodevices but controlling geometry simultaneously with position remains a challenge.

Purpose of the Study:

To demonstrate a novel method for large-scale, shape-controlled deterministic assembly of nanowires.
To achieve simultaneous control over nanowire position and geometry for nanodevice fabrication.

Main Methods:

Patterning U-shaped trenches using lithography on substrate wafers.
Employing shear transfer to position nanowires within the trenches, guiding their shape.
Utilizing electron-beam lithography for precise trench definition and studying nanowire deformation mechanics.

Main Results:

Achieved wafer-scale deterministic assembly of U-shaped nanowires at over 430,000 sites with ~90% yield.
Demonstrated that shaping primarily involves elastic deformation, with limits dependent on nanowire diameter and applied forces.
Successfully fabricated U-shaped three-dimensional nanowire field-effect transistor bioprobe arrays with 200 individually addressable nanodevices.

Conclusions:

The developed method enables precise, large-scale, shape-controlled deterministic assembly of nanowires.
This approach integrates top-down fabrication with bottom-up assembly for novel nanostructure configurations.
The technique holds significant potential for applications in nanobioelectronics and nanophotonics.