Time-of-Flight Secondary Ion Mass Spectrometry Dynamic Ion Migration
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Solution Overview
Problem
Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) is limited to investigating static chemical phenomena, as it cannot characterize dynamic changes in chemical composition during measurement.
Innovation Solution
A method and system for performing time-of-flight secondary ion mass spectrometry that involves directing a primary ion beam at a sample, stimulating ion migration within the sample using various stimuli such as electric fields, electromagnetic radiation, temperature changes, or mechanical forces, and collecting secondary ions for analysis, allowing for time-resolved chemical characterization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ToF-SIMS is used for chemical characterization, then spatial and mass resolution are improved, but the ability to study dynamic processes deteriorates
Solution Approach 1:
The patent applies the Dynamics principle by transforming the static ToF-SIMS measurement into a dynamic process. A stimulus (such as electric field, light, or temperature change) is applied to induce ion migration in the sample, and the system continuously monitors the changing ion distribution over time. This allows the characterization of dynamic processes while maintaining the high spatial and mass resolution of ToF-SIMS, directly resolving the contradiction between measurement precision and adaptability for dynamic studies.
2Adaptability or versatility
If a stimulus is applied to induce ion migration, then the ability to study dynamic processes is improved, but the complexity of the system increases
Solution Approach 1:
The patent employs the Universality principle by designing a stimulus system that can apply multiple types of stimuli (electric field, light, temperature) through a unified platform. The same basic setup can be configured for different stimulus types depending on the research question, avoiding the need for entirely separate systems for each stimulus type. This reduces the effective complexity while maintaining versatility for studying various dynamic processes.
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
Enables the study of dynamic ionic and chemical processes in materials like photovoltaics and ferroelectrics, providing detailed insights into ion migration and chemical changes over time, enhancing the spatial and mass resolution of chemical characterization.
Implementation Method 1
It utilizes a primary ion beam focused on the surface of the studied sample to generate and extract secondary analyte ions
Implementation Method 2
Analysis of secondary ions is performed using time-of-flight mass analyzers, in which ions are accelerated in the external electric field and move towards a detector. By the time-of-flight from the sample to the detector, the mass-to-charge ratio of secondary ions can be acquired
Implementation Method 3
The stimulation of the ions within the sample can be the application of an electric field across the sample
Implementation Method 4
The electromagnetic radiation can be a laser beam
Data Source
AI summary
A method of performing time-of-flight secondary ion mass spectrometry on a sample includes the step of directing a beam of primary ions to the sample, and stimulating the migration of ions within the sample while the beam of primary ions is directed at the sample. The stimulation of the ions is cycled between a stimulation state and a lower stimulation state. Secondary ions emitted from the sample by the beam of primary ions are collected in a time-of-flight mass spectrometer. Time-of-flight secondary ion mass spectrometry is then performed on the secondary ions. A system for performing time-of-flight secondary ion mass spectrometry on a sample is also disclosed.