Sub-Critical Atom Cluster Formation by Rapid Vapor Cooling
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Solution Overview
Problem
Existing technologies assume that sub-critical size clusters are inherently unstable and cannot be made into industrially useful materials, overlooking the possibility of preserving and forming stable sub-critical nuclei by altering vapor conditions during the nucleation process.
Innovation Solution
A method involving rapid expansion and cooling of a vapor cloud with controlled parameters to preserve sub-critical nuclei, forming stable clusters smaller than the critical size, which are then condensed into materials with useful properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional vapor condensation is used, then sub-critical nuclei are formed during nucleation, but they are completely destroyed due to inherent instability
Solution Approach 1:
The patent applies parameter changes by rapidly altering temperature and pressure conditions during vapor condensation. Specifically, the vapor cloud is rapidly cooled from high temperature to below the condensation point, and pressure is rapidly reduced. These parameter changes occur faster than the timescale for sub-critical nuclei destruction, thereby preserving nuclei that would normally be unstable and leading to their conversion into stable clusters.
Solution Approach 2:
The patent employs preliminary action by forming sub-critical nuclei during the initial rapid expansion phase before the destruction process can complete. The nuclei are created in advance under controlled conditions, and the subsequent rapid cooling and compression occur before these nuclei can be destroyed, effectively capturing them in a stable state.
2Reliability
If rapid expansion and cooling are applied to preserve sub-critical nuclei, then stable sub-critical size clusters are formed, but the process requires precise control of vapor parameters
Solution Approach 1:
The patent employs periodic action through pulsed laser ablation of the carbon target. The laser operates in pulsed mode, creating periodic vapor clouds that undergo rapid expansion and cooling. This periodic action allows for repeated formation of stable sub-critical clusters while maintaining control over the process parameters through the timing and intensity of the laser pulses.
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 creation of stable sub-critical size clusters, demonstrating unique properties such as high electrochemical capacity, thermal and chemical stability, and high ionic conductivity, suitable for applications in energy storage devices and lithium-sulfur batteries.
Implementation Method 1
rapid expansion and rapid cooling of a vapor cloud takes place in which the vapor conditions or parameters are controlled so that multiple stable clusters that are formed in a sub-critical nucleation process
Implementation Method 2
sub-critical nucleation process for making stable clusters of atoms having subcritical size
Implementation Method 3
multiple stable clusters that are formed in a sub-critical nucleation process, each with a size less than the critical size, are condensed
Data Source
AI summary
A method of making stable clusters of atoms that are of subcritical size, in which rapid expansion and rapid cooling of a vapor cloud takes place in which the vapor conditions or parameters are controlled so that multiple stable clusters, each with a size less than the critical size and formed from sub-critical nucleation, are condensed.