Catalyst-Free Graphene-Graphite Nano Device for Integrated Circuits
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Solution Overview
Problem
Developing a nano device that integrates graphene and monocrystalline graphite to overcome the difficulty in creating photonic devices, particularly in the visible and ultraviolet regions, while maintaining high-purity and high-quality without using metal catalysts.
Innovation Solution
A nano device comprising a carbon layer with a honeycombed planar structure of one-layered graphene and two or more-layered monocrystalline graphite, featuring vertically-grown nanostructures such as nanorods, nanoneedles, or nanotubes, with a substrate, recesses, and a multilayer film to form integrated circuits and p-n junctions, eliminating the need for metal catalysts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If metal catalysts are used to grow nanostructures on graphene, then the growth process is facilitated, but the purity and quality of the graphene structure deteriorates due to contamination
Solution Approach 1:
The invention extracts and eliminates the metal catalyst from the nanostructure growth process. By using a different growth mechanism that does not rely on metal catalysts, the patent removes the source of contamination while still achieving successful nanostructure formation on graphene and graphite surfaces
Solution Approach 2:
The invention introduces an intermediary approach by using a specific growth method (chemical vapor deposition with controlled conditions) that mediates between the need for catalyst-free growth and the requirement for successful nanostructure formation. This intermediary process enables growth without direct metal catalyst contact
2Adaptability or versatility
If vertically-grown nanostructures are integrated on graphene, then photonic device functionality is achieved, but the device complexity increases
Solution Approach 1:
The invention segments the device into distinct functional components: the graphene base layer provides electrical conductivity, while the vertically-grown nanostructures provide photonic functionality. This segmentation allows each component to be optimized independently while maintaining overall system simplicity
Solution Approach 2:
The invention transitions from two-dimensional graphene structures to three-dimensional vertically-grown nanostructures. This dimensional change enables photonic device functionality by creating structures that interact with light in multiple dimensions, thereby achieving versatility without proportionally increasing complexity
Data Source
AI summary
Disclosed herein is a nano device, including: a carbon layer including one-layered graphene having a honeycombed planar structure in which carbon atoms are connected with each other and two or more-layered monocrystalline graphite; and one or more vertically-grown nanostructures formed on the carbon layer. This nano device can be used to manufacture an integrated circuit in which various devices including a graphene electronic device and a photonic device are connected with each other, and is a high-purity and high-quality nano device having a small amount of impurities because a metal catalyst is not used.