Transition Temperature Microscopy for Thermal Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current techniques for imaging thermal transitions in materials lack high resolution and spatial differentiation, making it difficult to accurately map thermal transition temperatures in composite materials and pharmaceuticals, as they are primarily sensitive to mechanical properties rather than chemical and thermal differences.
Innovation Solution
Transition temperature microscopy uses a heatable probe with a cantilever and thermal controller to detect thermal expansion and temperature changes, allowing for automatic measurement and mapping of thermal phase transitions at various scales, from centimeters to nanometers, by analyzing nanoTA curves and employing motorized stages and nanopositioners for precise sample-probe interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional techniques (TEM, AFM phase imaging) are used to image materials, then material components can be distinguished, but thermal transition temperatures cannot be measured with high resolution and spatial differentiation
Solution Approach 1:
The patent replaces mechanical detection methods (TEM, AFM phase imaging) with thermal detection using a heated probe that measures thermal transitions through thermal expansion and heat capacity changes, enabling direct measurement of thermal transition temperatures with high spatial resolution
Solution Approach 2:
The patent changes the detection parameter from mechanical properties (friction, adhesion, stiffness) to thermal properties (temperature, heat capacity, thermal expansion) by controlling the probe temperature and measuring thermal responses, thereby enabling measurement of thermal transition temperatures
2Measurement precision
If bulk thermal analysis (DSC) is used to measure thermal transitions, then thermal transition temperatures can be measured, but spatial differentiation is lost
Solution Approach 1:
The patent segments the bulk sample into small local regions by using a sharp probe tip that can be positioned at specific locations, enabling measurement of thermal transitions at the micro-scale level while maintaining spatial differentiation across the sample
Solution Approach 2:
The patent introduces a heated probe as an intermediary between the bulk sample and the measurement system, allowing thermal transitions to be measured at local regions through the probe-sample interaction while maintaining spatial resolution
3Measurement precision
If manual point measurements are performed, then thermal transitions can be measured at specific locations, but high resolution imaging and automated mapping are not achieved
Solution Approach 1:
The patent implements continuous automated scanning of the probe across the sample surface, continuously measuring thermal transitions at each position and building up a complete thermal transition temperature map, thereby achieving high-resolution imaging with improved productivity
Solution Approach 2:
The patent uses automated detection algorithms that analyze the thermal response signals in real-time to identify transition temperatures and guide the scanning process, enabling rapid automated mapping without manual intervention
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 high-resolution imaging of thermal transition temperatures, facilitating the identification of material components, amorphous and crystalline regions, and drug polymorphs, with significantly reduced imaging time, allowing for dynamic changes to be visualized and thermal properties to be spatially resolved.
Implementation Method 1
A heatable probe with a cantilever and thermal controller to detect thermal expansion and temperature changes
Implementation Method 2
Thermal controller supplies a control signal to a heater region of the probe. A portion of the heat from the probe flows from the probe tip into the sample
Implementation Method 3
The increase in sample temperature causes a detectable probe data signal sensed by the probe. The thermal expansion may be detected by recording a change in the bend, vertical position, and/or oscillation of the cantilever
Data Source
AI summary
A system and method for automatic analysis of temperature transition data over an area of a sample surface. The system relies on the use of a microfabricated probe, which can be rapidly heated and cooled and has a sharp tip to provide high spatial resolution. The system also has fast x-y-z positioners, data collection, and algorithms that allow automatic analysis of and visualization of temperature transition data.