Aligned Carbon Nanotube Template for Nanostructure Fabrication
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Solution Overview
Problem
Current methods for fabricating microstructures, such as electron beam lithography and plasma etching, require complex and expensive equipment, are time-consuming, and struggle to achieve nanoscale dimensions effectively.
Innovation Solution
A method involving the suspension of aligned carbon nanotubes, application of a precoated layer, transfer to a substrate, and annealing to form nanostructures, which are then integrated via van der Waals forces, allowing for the creation of nanostructures with precise alignment and size control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electron beam lithography or plasma etching methods are used to fabricate microstructures, then microstructures can be produced, but the equipment is large and complex, the process is too complex, the fabricate time is too long, and the size is difficult to achieve nanoscale dimension
Solution Approach 1:
The patent uses aligned carbon nanotubes as an intermediary template to transfer patterns to the substrate. Instead of directly using complex lithography equipment to define nanoscale features, the carbon nanotubes serve as a self-organized template that simplifies the patterning process while achieving precise nanoscale dimensions (10-300 nm).
Solution Approach 2:
The invention copies the pattern from the aligned carbon nanotube structure onto the substrate through the precoated layer. The nanotube array serves as a master template that is replicated in the final nanostructure pattern, eliminating the need for direct nanoscale lithography while maintaining dimensional accuracy.
2Manufacturing precision
If electron beam lithography or plasma etching methods are used to fabricate microstructures, then microstructures can be produced, but the fabricate time is too long
Solution Approach 1:
The aligned carbon nanotubes are prepared and aligned in advance before the actual nanostructure fabrication. This preliminary self-organization of nanotubes creates a ready-made template that accelerates the subsequent patterning process, eliminating time-consuming step-by-step lithography operations.
Solution Approach 2:
The patent replaces the mechanical and chemical processes of traditional lithography and etching with a thermal process. The precoated layer is transferred to the substrate through thermal annealing, which simplifies the fabrication steps and reduces overall processing time while maintaining nanoscale precision.
3Manufacturing precision
If aligned carbon nanotubes with precoated layer are annealed to form nanostructures, then nanostructures with sizes from 10 to 300 nanometers can be produced, but the precoated layer must be precisely controlled in thickness
Solution Approach 1:
The patent controls the final nanostructure size by adjusting the thickness of the precoated layer on the carbon nanotubes. By varying this parameter within a specific range (producing 10-300 nm structures), precise size control is achieved. The annealing process transforms the precoated layer dimensions into the final nanostructure dimensions in a predictable manner.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method simplifies the fabrication process, reduces time and costs, and enables the production of nanostructures with sizes ranging from 10 to 300 nanometers, enhancing their alignment and integration for industrial applications, particularly improving light emission efficiency in light emitting diodes.
Implementation Method 1
removing the carbon nanotube structure (110) by annealing the carbon nanotube composite structure (130) in a annealing temperature from about 500° C. to about 700° C., wherein the precoated layer (120) is softened and contracted
Implementation Method 2
integrated via van der Waals forces
Data Source
AI summary
A method of making nanostructures includes following steps. A carbon nanotube structure is suspended, wherein the carbon nanotube structure includes a number of carbon nanotubes orderly aligned. A carbon nanotube composite structure is formed by applying a precoated layer on the carbon nanotube structure, wherein a thickness of the precoated layer on an outer surface of each of the number of carbon nanotubes ranges from about 2 nanometers to about 10 nanometers. The carbon nanotube composite structure is transferred on a substrate and treating the carbon nanotube composite structure with a solution. The carbon nanotube structure is removed by annealing the carbon nanotube composite structure in an annealing temperature from about 500° C. to about 700° C., wherein the precoated layer is softened and contracted.