Conical Nano-Carbon Needle Tip with Metal Carbide Interface
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Solution Overview
Problem
Existing methods for preparing nano-material functionalized needle tips, such as those using microoperation systems, result in high interface resistance and low mechanical strength due to physical adsorption, and fail to ensure consistent orientation of one-dimensional/quasi-one-dimensional nano-materials with the metal needle tip, limiting their practical application.
Innovation Solution
A conical nano-carbon material functionalized needle tip is formed using a covalent bond between the nano-carbon material and a metal needle tip, specifically tungsten, iron, cobalt, nickel, or titanium, with the nano-carbon material's orientation aligned with the axial direction, achieved through high-temperature reactions or laser irradiation to create a metal carbide interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If physical adsorption is used to adhere nano-materials to the needle tip, then the preparation process is simple, but the interface resistance is high and mechanical strength is low
Solution Approach 1:
The patent changes the bonding mechanism from physical adsorption to covalent bonding by forming metal carbide through high-temperature reactions. This parameter change in bonding type fundamentally improves both interface resistance and mechanical strength while maintaining preparation simplicity through direct heating methods.
Solution Approach 2:
The patent creates a composite interface between metal needle tip and carbon nano-material through metal carbide formation. This composite structure combines the advantages of both materials while achieving strong covalent bonding, thereby improving reliability without complicating the manufacturing process.
2Ease of manufacture
If conventional preparation methods are used, then the needle tip can be functionalized, but the orientation of one-dimensional/quasi-one-dimensional nano-materials cannot be ensured consistent with the axial direction
Solution Approach 1:
The patent replaces mechanical alignment methods with a chemical field approach. By using high-temperature reactions to form metal carbide, the orientation is determined by the chemical bonding process itself rather than mechanical manipulation, achieving both ease of manufacture and high orientation precision.
Solution Approach 2:
The patent employs self-alignment through the chemical reaction process. The one-dimensional/quasi-one-dimensional nano-materials automatically orient themselves along the axial direction during the metal carbide formation process, eliminating the need for external alignment mechanisms and achieving high manufacturing precision automatically.
3Ease of operation
If focused ion beam is used to cut and separate the tail of conical nano-carbon material, then the material can be detached from substrate, but the connection between nano-material and needle tip is only by physical force
Solution Approach 1:
The patent introduces metal carbide as an intermediary substance between the conical nano-carbon material and the metal needle tip. This intermediary layer provides strong covalent bonding, transforming the connection from weak physical force to strong chemical bonding while maintaining ease of operation through direct heating.
4Ease of manufacture
If carbon or tungsten is deposited at the contact interface to fix nano-materials, then the nano-materials are attached to the needle tip, but the interface resistance remains high
Solution Approach 1:
Instead of depositing additional materials to improve bonding, the patent inverts the approach by directly forming metal carbide through high-temperature reactions between the metal needle tip and carbon nano-material. This inversion eliminates the need for additional deposited layers and directly achieves low interface resistance through strong covalent bonding.
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 resulting needle tip has improved interfacial contact, higher mechanical strength, and better electrical conductivity due to the metal carbide interface, avoiding contamination from deposited materials and ensuring consistent orientation.
Implementation Method 1
combining a nano-carbon material with a material of a needle tip by means of a covalent bond; and the material of the needle tip is metal which is one or more selected from tungsten, iron, cobalt, nickel and titanium
Implementation Method 2
achieved through high-temperature reactions or laser irradiation to create a metal carbide interface
Data Source
AI summary
Provided is a conical nano-carbon material functionalized needle tip, formed by assembling a nano-carbon material with a material of a needle tip by means of a covalent bond; and the material of the needle tip is a metal selected from one or more of tungsten, iron, cobalt, nickel and titanium. Further provided is a method for preparing the conical nano-carbon material functionalized needle tip. The conical nano-material functionalized needle tip has an outstanding interface formed by metal-carbide covalent bonds, and the orientation of the conical nano-material is matched with the axial direction of the metal needle tip (illustrated in FIG. 6). The proposed preparation method affords a robust interface and avoids the potential pollution to the nano-material caused during the deposition of fixing materials, such as carbon or platinum or the like, in other preparation methods.