Solid-State Nanopore Apertures That Preserve Surface Modification
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Solution Overview
Problem
Existing methods for creating nano-sized apertures in solid-state membranes often destroy chemical surface modifications, leading to clogging of small apertures and unreliable ion-channel measurements due to leakage and instability of lipid bilayers.
Innovation Solution
A process that forms nano-sized apertures in a solid-state membrane after applying a chemical surface modification, using dielectric breakdown to preserve the modification and allow a lipid bilayer to form a seal, preventing charge transfer and stabilizing the aperture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods (laser heating, focused ion beams, electron beams) are used to create nanopores, then nanopores can be formed, but the processes are complex, time-consuming, and require specialized equipment
Solution Approach 1:
The patent replaces complex mechanical and physical processes (laser heating, focused ion beams, electron beams) with a simple mechanical scratching method using a stylus tip. This substitution eliminates the need for specialized equipment while achieving precise nanopore formation through direct mechanical interaction with the material surface.
Solution Approach 2:
The invention extracts the essential function of nanopore creation from complex multi-step processes and reduces it to a single simple scratching action. By removing unnecessary complexity and focusing on the core mechanical removal function, the patent achieves nanopore formation through a straightforward process that can be performed with basic tools.
2Manufacturing precision
If conventional methods are used, then nanopores can be formed, but the processes are time-consuming and require specialized equipment
Solution Approach 1:
The patent replaces time-consuming physical and chemical processes with a direct mechanical scratching method. This substitution dramatically reduces processing time while maintaining precision, as the stylus tip can be positioned and moved directly over the material surface to create nanopores in a single continuous action rather than through multiple sequential steps.
3Device complexity
If mechanical scratching is used, then process simplicity is improved, but control over nanopore dimensions and properties deteriorates
Solution Approach 1:
The patent employs dynamic control of the scratching process by varying the applied force, scratching speed, and stylus tip characteristics. These dynamic parameters allow real-time adjustment of nanopore dimensions and properties, enabling precise control while maintaining process simplicity. The system adapts the scratching conditions to achieve desired nanopore characteristics.
Solution Approach 2:
The invention controls nanopore dimensions and properties by changing physical parameters of the scratching process, including applied force magnitude, scratching velocity, and stylus tip geometry. By systematically varying these parameters, the patent achieves precise control over nanopore characteristics while keeping the overall process simple and straightforward.
4Reliability
If existing nanopore formation methods are used, then nanopores can be created, but they do not enable direct observation of molecular transport mechanisms
Solution Approach 1:
The patent creates locally controlled nanopores with specific dimensional characteristics that are optimized for observing molecular transport. By precisely controlling the size and shape of individual nanopores through the scratching process, the invention enables direct observation of molecular behavior at the nanopore interface, providing local quality that facilitates detection and measurement of transport mechanisms.
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 process enables the creation of small apertures with chemical surface modifications that support a stable lipid bilayer, reducing clogging and enhancing the reliability of ion-channel measurements.
Implementation Method 1
a first stylus tip is pressed against a surface of the polymer to scratch the polymer and remove material from the polymer
Implementation Method 2
a second stylus tip is pressed against the polymer to expand the formed cavity to a desired size and shape, thereby forming a nanopore
Data Source
Figure 1~2B
Figure 2C~2D
Figure 3~4
AI summary
The invention relates to a process for producing a substrate comprising an aperture, which process comprises providing a substrate which comprises a solid-state membrane and a chemical surface modification on a first surface of the solid-state membrane; and forming an aperture through the chemical surface modification and the solid-state membrane. The invention also relates to a substrate comprising a chemical surface membrane and an aperture, a sensor comprising such a substrate and an apparatus comprising such a substrate.