Core-Shell Nanoparticles for High-Temperature Optical Waveguides
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Solution Overview
Problem
Nanoparticles used in near-field optical waveguides face challenges due to low heat resistance, which is exacerbated by their small size, making them unreliable for semiconductor processing that requires temperatures above 250°C, especially since existing methods for forming metal wiring with nanoparticles result in melting at relatively low temperatures.
Innovation Solution
The development of core-shell nanoparticles with a metal core and an organic shell that incorporates hydrogen-bonding groups and aromatic rings to enhance heat resistance, allowing for stronger interactions between organic molecules and maintaining the integrity of the waveguide structure at higher temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If nanoparticles are made smaller to achieve finer wiring structures, then manufacturing precision is improved, but heat resistance deteriorates as melting point decreases
Solution Approach 1:
The patent applies composite materials by combining metal nanoparticles (core) with organic shell materials that have high heat resistance. The core-shell structure allows the nanoparticle to maintain structural integrity at high temperatures while the metal core provides the necessary electrical and optical properties for waveguide applications.
Solution Approach 2:
The patent uses thin organic shell films surrounding the metal nanoparticle core. These shell films provide thermal protection and structural stability at high temperatures, while being thin enough to not significantly interfere with the optical and electrical properties of the metal core.
2Reliability
If organic substances are used to form nanoparticle shells, then heat resistance is improved, but solubility and film formation capability may deteriorate
Solution Approach 1:
The patent applies local quality by designing the organic shell with specific functional groups at different locations: hydrophilic groups (carboxyl, hydroxyl, amino) on the outer surface for solubility and dispersion, while the inner portion provides heat resistance. This spatial differentiation of properties allows simultaneous achievement of heat resistance and ease of manufacture.
Solution Approach 2:
The patent changes chemical parameters of the organic shell by incorporating specific functional groups (carboxyl, hydroxyl, amino) that enhance both heat resistance and solubility. The molecular weight and chemical composition are optimized to balance thermal stability with dispersibility in solvents and film-forming capability.
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 use of core-shell nanoparticles with hydrogen-bonding and aromatic ring interactions significantly increases heat resistance, enabling the formation and maintenance of near-field optical waveguides that can withstand temperatures up to 400°C, suitable for semiconductor processing.
Implementation Method 1
a compound containing a hydrogen-bonding forming group, an absorption group different from the hydrogen-bonding forming group, and an aromatic ring
Implementation Method 2
an absorption group different from the hydrogen-bonding forming group
Data Source
AI summary
A particle includes: a metal; and a compound containing a hydrogen-bonding forming group, an absorption group different from the hydrogen-bonding forming group, and an aromatic ring, M representing the metal, A representing the absorption group, B representing the hydrogen-bonding forming group, a representing an integer of 0 or greater, b representing an integer of 0 or greater, c representing an integer of 1 or greater, R1 representing an aromatic ring (a planar ring up to a pi-electron number of 24) and a derivative of the aromatic ring, R2 through R5 representing a hydrogen atom, saturated hydrocarbon, unsaturated hydrocarbon, an ether bond, an ester bond, a cyano group, or derivatives of the substances and bonds, and the compound having a structure expressed by the following chemical formula.