Functionalized Carbon Allotrope Surfaces for Uniform Cryo-EM Grids

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Solution Overview

Problem

Cryo-electron microscopy faces challenges with uneven distribution and orientation of structural analysis target substances, such as proteins, on carbon grids due to the inherent properties of carbon allotropes like graphene and diamond-like carbon (DLC), which hinders effective structural analysis.

Innovation Solution

A method involving surface treatment of carbon allotropes with halogen oxide radicals to modify their surfaces, introducing functional groups like hydroxy, carboxy, or aldehyde groups, which enhances the binding capabilities of the carbon allotrope surfaces for structural analysis target substances, thereby preventing uneven distribution and orientation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a carbon grid formed of graphene or diamond-like carbon (DLC) is used to capture the structural analysis target substance, then the structural analysis can be performed by cryo-electron microscopy, but uneven distribution (localization), uneven orientation, and the like of the structural analysis target substance occur on the carbon grid

Engineering Contradiction:

Improvestructural analysis capabilityVSAvoiduniformity of substance distribution

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The invention changes the chemical parameters of the carbon allotrope surface by introducing functional groups (such as carboxyl, hydroxyl, or amine groups) through chemical modification methods. This alters the surface chemistry from inert to reactive, enabling controlled interaction with target substances and achieving uniform distribution and orientation.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite surface structure by combining carbon allotrope base material with functional groups. The resulting modified carbon allotrope surface maintains the structural integrity of graphene or DLC while adding functional properties that enable controlled substance capture, resolving the contradiction between structural capability and distribution uniformity.

Inventive Principle:

Principle #40Composite materials

2Reliability

If the carbon allotrope surface is modified by surface treatment with halogen oxide radical, then functional groups are introduced to enhance binding capabilities, but the complexity of the production process increases

Engineering Contradiction:

Improvebinding capabilityVSAvoidproduction process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention performs preliminary surface modification by introducing functional groups to the carbon allotrope surface before the actual cryo-electron microscopy analysis. This preliminary action of surface functionalization prepares the grid in advance to ensure optimal binding capabilities during the analysis process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention employs halogen oxide radical (such as chlorine dioxide) as a strong oxidant to accelerate the oxidation of carbon allotrope surfaces. This accelerated oxidation process efficiently introduces functional groups through chemical reactions, enhancing binding capabilities while maintaining process efficiency.

Inventive Principle:

Principle #38Strong oxidants (Accelerated oxidation)

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 modified carbon allotrope surfaces effectively suppress or prevent uneven distribution and orientation of structural analysis target substances, improving the structural analysis capabilities in cryo-electron microscopy by providing stronger binding sites for the target substances.

Implementation Method 1

the step of surface-treating by reacting a carbon allotrope surface with a halogen oxide radical, wherein the carbon allotrope surface is modified by the surface-treating

Methodology Applied

Scientific EffectSurface treatment by reacting with halogen oxide radical: Oxidation

Data Source

PatentUS12139406B2Method for producing substance with modified carbon allotrope surface, method for producing substance with carbon allotrope surface into which functional group is introduced, method for producing grid for cryo-electron microscopy, organic substance, and grid for cryo-electron microscopy

Publication Date: 2024.11.12 OSAKA UNIVERSITY

AI summary

The present invention provides a method for producing a substance with a modified carbon allotrope surface that can suppress or prevent uneven distribution, uneven orientation, and the like of a structural analysis target substance in a structural analysis by cryo-electron microscopy. A method for producing a substance with a modified carbon allotrope surface of the present invention includes: the step of surface-treating by reacting a carbon allotrope surface with a halogen oxide radical, wherein the carbon allotrope surface is modified by the surface-treating.