Gold Nanocluster Synthesis via Partial Capping
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Solution Overview
Problem
Conventional methods for synthesizing and surface modifying gold nanoclusters are complex and time-consuming, limiting their application in biosensing and bioluminescence labeling, particularly for detecting thiol-containing compounds.
Innovation Solution
A method involving mixing a gold ion-containing solution with a reducing agent, such as glutathione, and heating to form gold nanoclusters that are partially capped, allowing for easy preparation and specific fluorescence emission peaks, enabling efficient detection of thiol-containing compounds through fluorescence spectroscopy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used for synthesizing and surface modifying gold nanoclusters, then the nanoclusters can be produced with desired properties, but the process becomes complicated and time-consuming
Solution Approach 1:
The patent combines the synthesis and surface modification steps into a single integrated process. The gold nanoclusters are synthesized in the presence of both the reducing agent and the capping agent simultaneously, eliminating the need for separate synthesis and modification steps. This merging of operations directly reduces process complexity while maintaining nanocluster quality.
Solution Approach 2:
The capping agent is introduced during the synthesis process rather than after completion. By performing the surface modification action preliminarily, during the formation of the nanoclusters, the process is simplified and time is reduced without compromising the final product quality.
2Reliability
If conventional methods are used for synthesizing and surface modifying gold nanoclusters, then the nanoclusters can be produced with desired properties, but the process becomes time-consuming
Solution Approach 1:
The patent combines the synthesis and surface modification steps into a single integrated process. The gold nanoclusters are synthesized in the presence of both the reducing agent and the capping agent simultaneously, eliminating the need for separate synthesis and modification steps. This merging of operations directly reduces process complexity while maintaining nanocluster quality.
Solution Approach 2:
The capping agent is introduced during the synthesis process rather than after completion. By performing the surface modification action preliminarily, during the formation of the nanoclusters, the process is simplified and time is reduced without compromising the final product quality.
3Stability of the object's composition
If gold nanoclusters are fully capped by reducing agent, then stability is improved, but fluorescence emission properties are reduced
Solution Approach 1:
The patent applies partial capping rather than complete capping of the gold nanoclusters. By controlling the ratio of capping agent to gold ions, only a portion of the nanocluster surface is covered, maintaining local areas with high fluorescence emission while providing sufficient stability through the capped regions. This local quality approach balances stability and fluorescence intensity.
Solution Approach 2:
The patent uses partial capping action rather than complete capping. By using a controlled amount of capping agent that does not fully cover the nanocluster surface, the method achieves sufficient stability while preserving the fluorescence emission properties that would be suppressed by complete capping.
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 enables the production of gold nanoclusters with dual or single fluorescence emission peaks, facilitating their use as sensitive sensors for thiol-containing compounds, enhancing their application in biosensing and biomedicine with improved ease and efficiency.
Implementation Method 1
mixing a gold ion-containing solution and a reducing agent solution to obtain a first mixture liquid; and heating the first mixture liquid to obtain a second mixture liquid, wherein the second mixture liquid contains a gold nanocluster composition, and the gold nanoclusters are partially capped by reducing agent
Implementation Method 2
heating the first mixture liquid to obtain a second mixture liquid
Implementation Method 3
the gold nanocluster composition has fluorescence emission peaks at wavelength of 600-650 nm and 800-850 nm
Data Source
AI summary
A gold nanocluster composition and method for preparing the same are provided. The method includes providing a gold ion-containing solution. Next, the method entails mixing the gold ion-containing solution and a reducing agent solution to obtain a first mixture liquid, and heating the first mixture liquid to obtain a second mixture liquid, wherein the second mixture liquid contains the gold nanoclusters, which are partially capped by reducing agent.