Phosphorous-Treated Nanoparticle Coatings for Refractive Index
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Solution Overview
Problem
Existing technologies face challenges in achieving high refractive index and improved packing density in layer-by-layer self-assembled coatings using inorganic oxide nanoparticles, which affects their optical and barrier properties.
Innovation Solution
Incorporating phosphorous-containing surface treatments on inorganic oxide nanoparticles during the layer-by-layer self-assembly process, enhancing the refractive index and packing density of the nanoparticles, and altering their charge properties to create high-concentration bi-layers with improved optical and barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If inorganic oxide nanoparticles are used in layer-by-layer self-assembled coatings, then the coatings can be formed with alternating charged layers, but the refractive index and packing density are insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the surface charge density and chemical composition of inorganic oxide nanoparticles through phosphorous-containing treatments. This alters the electrostatic interactions during layer-by-layer assembly, enabling higher packing densities and refractive indices while maintaining coating stability
Solution Approach 2:
The patent creates composite nanoparticle structures by combining inorganic oxide cores with phosphorous-containing surface treatments. This composite approach enables simultaneous optimization of packing density, refractive index, and charge properties that cannot be achieved with single-material nanoparticles
2Ease of manufacture
If standard inorganic oxide nanoparticles are used, then the coating process is simple, but the optical properties (transmission and reflectivity) are not optimized
Solution Approach 1:
The patent modifies optical parameters by changing the surface chemistry and charge density of nanoparticles. The phosphorous-containing surface treatment alters refractive index and packing density, which directly improves transmission and reflectivity while maintaining the simplicity of the layer-by-layer deposition process
3Strength
If higher concentration bi-layers are formed, then barrier and mechanical properties improve, but achieving high packing density is difficult
Solution Approach 1:
The patent changes the charge density and surface chemistry parameters of nanoparticles to enhance electrostatic attraction between alternating layers. This enables formation of high-concentration bi-layers with improved packing density, which directly translates to better mechanical strength and barrier properties
Solution Approach 2:
The patent uses phosphorous-containing surface treatments that create consistent charge patterns on nanoparticle surfaces. This uniform charge distribution enables reliable layer-by-layer assembly with high packing density, replicating optimal structural arrangements throughout the coating
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 phosphorous-containing surface treatment increases the refractive index and packing density of the nanoparticles, resulting in coatings with enhanced optical properties, such as increased transmission and reduced reflectivity, while also providing improved barrier and mechanical properties.
Implementation Method 1
a plurality of layers deposited by layer-by-layer self-assembly disposed on the substrate. A portion of the layers comprise inorganic oxide nanoparticles comprising a phosphorous-containing surface treatment
Implementation Method 2
layers deposited by layer-by-layer self-assembly
Implementation Method 3
The phosphorous-containing surface treatment increases the refractive index and packing density of the nanoparticles, resulting in coatings with enhanced optical properties, such as increased transmission and reduced reflectivity
Data Source
AI summary
An article is described comprising a substrate and a plurality of layers deposited by layer-by-layer self-assembly disposed on the substrate. A portion of the layers comprise inorganic oxide nanoparticles comprising a phosphorous-containing surface treatment. Also described is an article comprising a bi-layer, the bi-layer comprises a monolayer of a polycation and a monolayer of a polyanion. The polyanion comprises inorganic oxide nanoparticles comprising a phosphorous-containing surface treatment. The polycations may be a polyelectrolyte or inorganic oxide nanoparticles.