Immersion Liquid Composition for Microscopy Temperature Stability
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Solution Overview
Problem
Current immersion liquids for microscopy are inadequate at temperatures outside the standard 23°C, leading to image errors and poor image quality due to their refractive index, viscosity, and dispersion characteristics, which are not adaptable to varying examination conditions.
Innovation Solution
An immersion liquid comprising a saturated polycyclic hydrocarbon residue, an oligomeric or polymeric saturated acyclic hydrocarbon, and an alkyl aromatic compound, such as alkyl naphthalene or alkyl biphenyl, which allows for optimal adjustment of refractive index, dispersion, and viscosity over a temperature range of 0-50°C, ensuring excellent image quality without dissolving microscopy dyes or chemically attacking samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If standard immersion liquids are used at temperatures other than 23°C, then the refractive index and viscosity change significantly, but image quality deteriorates due to spherical aberrations
Solution Approach 1:
The patent modifies the chemical composition parameters of the immersion liquid by incorporating specific saturated polycyclic hydrocarbons (such as adamantane derivatives) combined with aromatic hydrocarbons. This compositional parameter change enables the liquid to maintain stable refractive index and viscosity across a broad temperature range (0-50°C), thereby preventing spherical aberrations and maintaining image quality at non-standard temperatures.
Solution Approach 2:
The invention creates a composite immersion liquid formulation by combining multiple components: saturated polycyclic hydrocarbons (20-80 wt%), aromatic hydrocarbons (10-50 wt%), and optionally additional additives (5-30 wt%). This composite material approach allows the liquid to exhibit improved thermal stability and consistent optical properties across varying temperatures, resolving the contradiction between temperature adaptability and image quality.
2Manufacturing precision
If immersion liquids are formulated for standard temperature (23°C), then optimal image quality is achieved at that temperature, but performance degrades significantly at temperatures deviating from 23°C
Solution Approach 1:
The patent develops a universal immersion liquid formulation that functions effectively across multiple temperature conditions (0-50°C) rather than being optimized for a single standard temperature. The specific combination of saturated polycyclic hydrocarbons and aromatic hydrocarbons provides multi-functional performance, maintaining stable optical properties whether the examination is conducted at low temperatures (4°C marine biology), body temperature (37°C), or elevated temperatures (45°C protein examinations), thus achieving both high image quality and broad temperature adaptability.
3Ease of operation
If conventional immersion liquids are used, then handling is straightforward, but viscosity changes exponentially with temperature causing handling difficulties
Solution Approach 1:
The patent alters the viscosity parameter of the immersion liquid through specific compositional choices. The saturated polycyclic hydrocarbons (particularly adamantane derivatives) and aromatic hydrocarbon combination creates a liquid with suppressed viscosity-temperature dependence. This parameter modification ensures the liquid remains easily handleable across the 0-50°C range, neither becoming too thick at low temperatures nor too thin at high temperatures, thus maintaining ease of operation throughout the expanded temperature range.
Data Source
AI summary
An immersion liquid for microscopy is provided, comprising (a) an organic compound which contains a saturated polycyclic hydrocarbon residue, (b) an oligomeric or polymeric saturated acyclic hydrocarbon and (c) an alkyl aromatic compound, selected from the group consisting of alkyl naphthalene and alkyl biphenyl.