Silver Nanoplate Concentration via Stabilizing Agents
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Solution Overview
Problem
Existing methods for preparing silver nanoplate solutions result in dilute solutions with low optical density, leading to undesirable degradation of nanoparticle shape and optical properties when concentrated, limiting their applications in technologies that require higher particle density.
Innovation Solution
A method involving the use of stabilizing agents, such as sodium citrate and polyvinyl alcohol, to maintain the shape and optical properties of silver nanoplates during concentration, increasing the optical density while preserving their stability, involving steps like adding a stabilizing agent and a buffer to the solution and then concentrating it using tangential flow filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If silver nanoplate solutions are concentrated to increase particle density, then the concentration increases, but the nanoparticle shape and optical properties degrade
Solution Approach 1:
The patent applies preliminary action by pre-coating silver nanoplates with a protective shell material (such as silica, polymer, or metal oxide) before concentration processes. This pre-protection prevents shape degradation and optical property loss during subsequent concentration, allowing particle density to increase while maintaining nanoparticle integrity
Solution Approach 2:
The patent uses a shell material as an intermediary layer between the silver nanoplate core and the external environment. This shell acts as a protective mediator that prevents direct interaction between the nanoplate surface and potential degrading factors during concentration, thereby preserving shape and optical properties while enabling increased particle density
2Quantity of substance
If conventional fabrication methods are used, then silver nanoplates can be produced, but the solutions remain dilute with low optical density
Solution Approach 1:
The patent applies preliminary action by pre-coating silver nanoplates with a protective shell material (such as silica, polymer, or metal oxide) before concentration processes. This pre-protection prevents shape degradation and optical property loss during subsequent concentration, allowing particle density to increase while maintaining nanoparticle integrity
Solution Approach 2:
The patent uses a shell material as an intermediary layer between the silver nanoplate core and the external environment. This shell acts as a protective mediator that prevents direct interaction between the nanoplate surface and potential degrading factors during concentration, thereby preserving shape and optical properties while enabling increased particle density
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 method effectively produces high optical density solutions of silver nanoplates with preserved shape and optical properties, enabling their use in applications requiring concentrated nanoparticle solutions without significant degradation.
Implementation Method 1
In one embodiment, the invention comprises a solution of silver nanoplates that have been surface functionalized with chemical or biological agents that are physisorbed to the surface
Implementation Method 2
concentrating it using tangential flow filtration
Data Source
AI summary
Embodiments of the present invention relate to methods for preparing high optical density solutions of nanoparticle, such as nanoplates, silver nanoplates or silver platelet nanoparticles, and to the solutions and substrates prepared by the methods. The process can include the addition of stabilizing agents (e.g., chemical or biological agents bound or otherwise linked to the nanoparticle surface) that stabilize the nanoparticle before, during, and/or after concentration, thereby allowing for the production of a stable, high optical density solution of silver nanoplates. The process can also include increasing the concentration of silver nanoplates within the solution, and thus increasing the solution optical density.