TEM Micro-Grid Carbon Nanotube Metal Composite Stability
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Solution Overview
Problem
Carbon nanotube structures used in transmission electron microscope (TEM) micro-grids are prone to floating, affecting the resolution and accuracy of electron microscopy images due to their lightweight nature.
Innovation Solution
A TEM micro-grid design featuring a carbon nanotube layer sandwiched between two metal layers, where the carbon nanotubes are bonded through dangling bonds with the metal layers, creating a stable structure that prevents floating and enhances sample fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carbon nanotube structure is used in TEM micro-grids to reduce interference, then the quality of electron microscopy images is improved, but the micro-grid structure becomes unstable and floats
Solution Approach 1:
The patent combines carbon nanotubes with metal materials to create a composite micro-grid structure. The metal material provides mechanical stability and weight, while the carbon nanotube layer maintains the low-interference properties essential for high-resolution electron microscopy imaging. This composite approach resolves the contradiction by integrating the advantages of both materials.
Solution Approach 2:
The patent modifies the physical parameters of the carbon nanotube structure by combining it with metal material, changing its weight and stability parameters. This allows the micro-grid to maintain both the low interference characteristics of carbon nanotubes and the structural stability required for accurate measurements.
2Measurement precision
If carbon nanotube structure is used to reduce interference, then image quality improves, but the weight of the micro-grid becomes too light causing floatation
Solution Approach 1:
The patent creates a composite structure where metal material is integrated with carbon nanotubes. The metal component increases the overall weight of the micro-grid to prevent floatation, while the carbon nanotube portion maintains the low-interference properties necessary for accurate electron microscopy measurements.
3Stability of the object's composition
If non-crystal carbon films are deposited on metal mesh to create micro-grids, then the micro-grid structure is stable, but interference with samples increases affecting image quality
Solution Approach 1:
The patent employs a porous carbon nanotube structure that provides mechanical stability while maintaining high porosity. This allows electron beams to pass through with minimal interference, improving image resolution compared to traditional non-crystal carbon films that block more electrons.
Solution Approach 2:
The patent replaces traditional non-crystal carbon films with a composite structure of carbon nanotubes and metal material. This composite provides both the stability needed for micro-grid integrity and the low-interference properties necessary for high-resolution imaging.
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
The solution improves the stability of the micro-grid, prevents carbon nanotube floatation, and enhances the accuracy of electron microscopy images by firmly fixing the samples, reducing interference and improving resolution.
Implementation Method 1
a first metal layer 120 and a second metal layer 130 are respectively bonded to a first surface 111 and a second surface 113 of the carbon nanotube layer 110 through electroplating
Data Source
AI summary
A transmission electron microscope micro-grid includes a carbon nanotube layer sandwiched between a first metal layer and a second metal layer. The carbon nanotube layer includes a first surface and a second surface opposite to each other, and the carbon nanotube layer comprises a number of carbon nanotubes. The first metal layer is attached on the first surface. The second metal layer is attached on the second surface. The first metal layer and the second metal layer are bonded with the carbon nanotube layer via a number of dangling bonds on the number of carbon nanotubes, the first metal layer defines a number of first through holes, the second metal layer defines a number of second through holes, and the carbon nanotube layer is exposed through the number of first through holes and the number of second through holes.