Colored Material Using Gold Nanoparticles on Particulate Carrier
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Solution Overview
Problem
Existing methods for producing colored materials using metal nanoparticles, such as gold, copper, or silver, are limited in terms of color range, stability, and modularity, and often involve solvent transfers.
Innovation Solution
A process involving an aqueous suspension of gold (+III) salt, a reducing agent, and a micron-scale particulate carrier, where the suspension is heated to form gold nanoparticles carried by the carrier, allowing for a wide range of colors and optimal stability without solvent transfers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing methods using metal nanoparticles are employed, then colored materials can be produced, but the color range is limited and color stability is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the synthesis process by using gold(+III) salts as precursors and controlling the reduction process in aqueous suspension, which enables precise control over nanoparticle size and distribution. This parameter control allows tuning of plasmon resonance across the visible spectrum while maintaining color stability through consistent particle morphology
Solution Approach 2:
The invention creates a composite system where metal nanoparticles are integrated into a micron-scale particulate carrier matrix. This composite structure provides both the optical properties from the nanoparticles and the structural stability from the carrier, achieving broad color range through particle size control while maintaining excellent color stability through the stable composite architecture
2Ease of manufacture
If existing manufacturing processes are used, then colored materials can be produced, but the processes are complex and involve solvent transfers
Solution Approach 1:
The patent merges multiple process steps into a single integrated aqueous suspension synthesis process. The reduction of gold salts, formation of nanoparticles, and stabilization occur simultaneously in one pot without requiring solvent transfers or sequential processing steps, thereby simplifying the manufacturing process and reducing operational complexity
Solution Approach 2:
The aqueous suspension acts as an intermediary medium that facilitates the entire synthesis process. By using water-based suspension instead of organic solvents, the process eliminates complex solvent transfer steps while maintaining nanoparticle stability and enabling straightforward processing and recovery
3Productivity
If existing methods are employed, then colored materials can be produced, but economic efficiency is reduced due to solvent transfers and process complexity
Solution Approach 1:
The aqueous suspension system is self-sufficient, requiring no additional solvents or complex processing steps. The water-based medium naturally stabilizes the nanoparticles during synthesis and can be directly used for subsequent applications or easily removed by evaporation, eliminating the need for expensive solvent recovery operations and improving overall production efficiency
Solution Approach 2:
By changing from organic solvent-based systems to aqueous suspension, the process achieves better economic efficiency. The aqueous system allows for simpler drying and processing steps, reduces material costs, and enables higher productivity through streamlined manufacturing without compromising the quality or performance of the colored materials
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 process achieves a well-defined spectrum of colors, modularity, and economic production with improved color stability, enabling a broad range of colors and types of substrates while minimizing solvent use.
Implementation Method 1
a step of heating an aqueous suspension comprising: at least one gold (+III) salt or at least gold nanoparticles, at least one reducing agent
Implementation Method 2
a step of heating an aqueous suspension comprising: at least one gold (+III) salt or at least gold nanoparticles, at least one reducing agent, and at least one micron-scale particulate carrier, to form said colored material in suspension
Implementation Method 3
materials comprising metal nanoparticles having optical properties based on the phenomenon of surface plasmon resonance
Data Source
AI summary
The invention relates to methods for producing coloured materials with the use of metal nanoparticles of gold, copper or silver, to said coloured materials, and to the uses of same in various applications.