Metal Nanoparticle Composite LSPR Absorption Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing metal nanoparticle composites for Local Surface Plasmon Resonance (LSPR) applications face challenges in achieving intense and sharp absorption spectra due to issues with nanoparticle size control, uniformity, spacing, and dispersion within the matrix, leading to suboptimal performance in sensors and other devices.
Innovation Solution
A metal nanoparticle composite is produced by heat-reducing metal ions in a resin to precipitate nanoparticles with controlled sizes, uniform shapes, and specific spacing, ensuring they are uniformly dispersed within a certain depth of the matrix, thereby enhancing the LSPR absorption spectrum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If metal nanoparticles are reduced in size to improve dispersion characteristics, then dispersion uniformity is improved, but particle diameter becomes too small to generate effective plasmon resonance
Solution Approach 1:
The patent applies parameter changes by controlling the reduction conditions (temperature, time, atmosphere) to achieve optimal particle size and distribution. By adjusting these parameters, the invention balances dispersion uniformity with sufficient particle diameter for plasmon resonance, resolving the contradiction between small size for dispersion and large size for resonance effect.
2Stability of the object's composition
If metal nanoparticles are dispersed throughout the matrix including near the surface, then uniform dispersion is improved, but protection from oxidation and aggregation deteriorates
Solution Approach 1:
The patent applies local quality by creating different dispersion characteristics in different regions of the matrix. Metal nanoparticles are concentrated in the internal region away from the surface, providing protection from oxidation and aggregation, while still achieving effective dispersion for plasmon resonance. This spatial differentiation resolves the contradiction between uniform dispersion and protection from degradation.
3Use of energy by moving object
If metal nanoparticle concentration is increased to enhance LSPR effect, then absorption intensity is improved, but particle aggregation increases
Solution Approach 1:
The patent applies dimensionality change by controlling the spatial distribution of metal nanoparticles in three-dimensional space within the matrix. By optimizing concentration and spatial arrangement, the invention achieves high absorption intensity through enhanced LSPR effect while preventing aggregation through proper dispersion control in the internal region, resolving the contradiction between concentration for effect and spacing for stability.
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 approach results in a composite with a sharp and intense absorption spectrum, enabling improved sensitivity in sensors and broader applications such as electromagnetic shielding and high-thermal conductivity materials.
Implementation Method 1
metal nanoparticles which are obtained through heat-reducing metal ions or metal salts contained in a matrix resin layer or a precursor resin layer
Implementation Method 2
LSPR is a resonance phenomenon due to an interaction between electrons in metal nanoparticles or metal microstructures having a size of several nanometers to 100 nm and light of a specific wavelength
Data Source
AI summary
A metal nanoparticle composite is provided, in which a matrix resin layer and metal nanoparticles are immobilized on the matrix resin layer. The metal nanoparticle composite has the following characteristics: a) the metal nanoparticles are obtained by heat-reducing metal ions or metal salts contained in the matrix resin layer or a precursor resin layer thereof; b) the metal nanoparticles exist within a region from the surface of the matrix resin layer to a depth of at least 50 nm; c) particle diameters of the metal nanoparticles are in the range of 1 nm to 100 nm with the mean particle diameter of greater than and equal to 3 nm; and d) a spacing between adjacent metal nanoparticles is greater than and equal to the particle diameter of a larger one of the adjacent metal nanoparticles.