3D Polymer Networks with Internal Channels for Biosensor Binding
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Solution Overview
Problem
Existing polymer networks for biosensors face limitations in analyte binding due to surface-blocking issues, where analyte molecules binding near the surface prevent access to probes deeper within the network, reducing measurement accuracy and sensitivity.
Innovation Solution
The development of three-dimensional polymer networks with channels extending from the surface into the interior, increasing the surface area and allowing for better access of analytes to probes, thereby enhancing binding capacity and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If probe biomolecules are immobilized throughout the interior of the polymer network to increase binding capacity, then the amount of analyte that can be bonded increases, but analyte molecules binding near the surface block access to probes deeper within the network, reducing measurement accuracy
Solution Approach 1:
The polymer network is segmented into distinct regions: a surface layer and an interior region with channels. This segmentation allows probes on the surface to bind analytes without blocking access to probes in the interior, as the channels provide dedicated pathways for analyte transport to deeper locations.
Solution Approach 2:
Channels act as intermediary structures that facilitate analyte transport from the surface to the interior of the network. These channels serve as mediators that enable analytes to reach interior probes without being blocked by surface binding events.
2Quantity of substance
If probe biomolecules are immobilized throughout the interior of the polymer network to increase binding capacity, then more analyte can be bonded, but the network becomes blocked by surface-bound analytes, preventing access to interior probes
Solution Approach 1:
The network is divided into a surface region and an interior region with channels. This segmentation creates separate access pathways, allowing analytes to reach interior probes through channels without being blocked by surface-bound analytes.
Solution Approach 2:
Channels serve as intermediary pathways that enable analyte access to the interior region. These channels mediate the transport process, ensuring that surface binding events do not block access to interior probes.
3Measurement precision
If a high density of probe biomolecules is immobilized on the surface to increase measurement accuracy, then the amount of analyte detected increases, but the network blocks further analyte binding, reducing measurement dynamic
Solution Approach 1:
The network is segmented into surface and interior regions with channels. This allows high probe density on the surface for accurate detection while channels provide additional binding capacity in the interior, extending the measurement dynamic range.
Solution Approach 2:
The solution transitions from two-dimensional surface binding to three-dimensional binding by incorporating channels that extend into the network interior. This dimensional expansion provides additional binding sites that are accessible through the channels, increasing measurement dynamic while maintaining surface accuracy.
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
These networks enable faster hybridization and more sensitive detection of analytes, allowing for a wider range of concentration measurements and improved signal-to-noise ratios, while also enabling the reuse of arrays and reducing manufacturing complexity.
Implementation Method 1
U.S. Publication No. 2008/0293592 describes a method for covalently immobilizing probe-biomolecules on organic surfaces by means of photoreactive crosslinking agents
Data Source
AI summary
The disclosure provides three-dimensional crosslinked polymer networks comprising one or more channels extending from the surface and/or near the surface of the network into the interior of the network, arrays comprising the networks, processes for making the networks, and uses of the networks and arrays.