Rapid Laser Heating for Intact Biomolecule Desorption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Thermal desorption methods are limited in detecting a wide range of molecular species due to their inability to achieve high heating rates, particularly for molecules with molecular weights greater than 500 Da, leading to incomplete desorption and decomposition of thermally labile compounds.
Innovation Solution
A method involving rapid resistive heating of a sample at rates of at least 106 K/s using a probe with a small heating tip, such as an atomic force microscopy cantilever, to thermally desorb analytes with molecular weights greater than 500 Da, preserving them intact for analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional thermal desorption is used, then the method is simple to operate, but it cannot detect molecules with molecular weight greater than 500 Da due to decomposition
Solution Approach 1:
The patent replaces conventional slow thermal heating with laser-induced rapid heating to achieve heating rates of 10^8 to 10^13 K/s. This substitution enables intact desorption of large biomolecules (molecular weight > 500 Da) that would otherwise decompose under conventional thermal desorption conditions.
Solution Approach 2:
The patent fundamentally changes the heating rate parameter from conventional slow heating to ultra-rapid heating rates (10^8 to 10^13 K/s) using laser pulses. This parameter change allows thermally labile compounds to be desorbed intact before decomposition can occur, expanding the detectable molecular weight range beyond 500 Da.
2Reliability
If high heating rates are applied to thermally labile molecules, then intact desorption is achieved, but the heating system becomes more complex
Solution Approach 1:
The patent replaces complex high-power electrical heating systems with laser-induced heating. The laser provides the necessary ultra-rapid heating rates (10^8 to 10^13 K/s) through optical energy absorption, achieving intact desorption of thermally labile molecules without requiring complex electrical power delivery systems.
Solution Approach 2:
The patent uses pulsed laser heating rather than continuous heating. The periodic pulsed action delivers intense heating rates during the pulse duration while allowing cooling between pulses, enabling intact desorption while managing thermal load and system complexity.
3Productivity
If slow heating is used for thermal desorption, then the system is simple, but molecules decompose before desorption
Solution Approach 1:
The patent changes the heating rate parameter from slow conventional heating to ultra-rapid laser-induced heating (10^8 to 10^13 K/s). This parameter change enables desorption to occur faster than the decomposition rate, achieving high productivity for thermally labile molecules while managing the complexity through laser system integration.
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
This approach enables the intact desorption and analysis of thermally labile molecules by overcoming decomposition rates, allowing for the detection of larger molecules that would otherwise decompose, and improving detection limits through higher concentration of analytes.
Implementation Method 1
The heating step can be resistive heating. The heating can be by a probe having a resistive heating element.
Implementation Method 2
heating the sample at a rate of at least 10^6 K/s to thermally desorb at least one analyte from the sample
Data Source
AI summary
A method for analyzing a sample having at least one analyte includes the step of heating the sample at a rate of at least 106 K/s to thermally desorb at least one analyte from the sample. The desorbed analyte is collected. The analyte can then be analyzed.