Flow Cell Bonding Materials for On-Demand Clean Detachment
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Solution Overview
Problem
Existing flow cells lack the ability to selectively attach and detach components on-demand while minimizing residue, limiting versatility and reusability.
Innovation Solution
The use of switchable bonding materials that can be modified by light, solvent, or temperature exposure to facilitate on-demand attachment and detachment of flow cell components, leaving minimal residue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional bonding materials are used to attach flow cell components, then strong bonding is achieved, but the components cannot be detached and leave significant residue
Solution Approach 1:
The bonding material transitions from a static, permanent state to a dynamic, switchable state. The material can reversibly change between bonded and detached states in response to external stimuli such as light, temperature, or chemical signals, enabling on-demand attachment and detachment of flow cell components without leaving residue.
Solution Approach 2:
The bonding properties of the material are controlled by changing physical or chemical parameters. External stimuli (light wavelength, temperature, pH, solvent exposure) modify the bonding strength parameter, allowing the material to switch between strongly bonded and easily detachable states, facilitating component reconfiguration and reuse.
2Strength
If permanent bonding materials are used, then flow cell structural integrity is maintained, but component reusability and reconfiguration are limited
Solution Approach 1:
The bonding system transitions from permanent to dynamically controllable. The bonding strength can be adjusted in real-time based on operational needs, allowing components to be strongly bonded during use and easily detached for reuse or reconfiguration, thereby maintaining structural integrity while enabling versatility.
Solution Approach 2:
The bonding material exhibits periodic switching between bonded and detached states in response to alternating external stimuli. This periodic action allows the flow cell components to be cyclically attached for operation and detached for reuse, maintaining strength during operation while enabling reusability over multiple cycles.
3Ease of operation
If switchable bonding materials are used, then on-demand detachment is achieved, but additional control mechanisms and complexity are introduced
Solution Approach 1:
The bonding material autonomously responds to external stimuli without requiring complex control systems. The material itself contains the switching mechanism, automatically transitioning between bonded and detached states when exposed to specific light wavelengths, temperature changes, or chemical environments, simplifying the overall system while enabling precise control.
Solution Approach 2:
Traditional mechanical bonding control (screws, clips, adhesives) is replaced with a chemical or optical switching mechanism. The bonding strength is controlled through molecular-level changes in the bonding material triggered by external stimuli, eliminating the need for mechanical fastening and fastening 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
Enables versatile configuration and reusability of flow cells by allowing components to be attached and detached as needed, with minimal residue, enhancing their functionality and durability.
Implementation Method 1
the switchable bonding materials are structurally modified upon exposure to preselected light wavelengths, and this structural modification facilitates the attachment or detachment of flow cell components
Implementation Method 2
the switchable bonding materials are structurally modified during a timed exposure to a preselected solvent, and this modification facilitates the detachment of flow cell components having the switchable bonding material(s) in contact therewith
Implementation Method 3
the switchable bonding materials are structurally modified during a timed exposure to a predetermined temperature (e.g., heat), and this modification facilitates the detachment of flow cell components having the switchable bonding material(s) in contact therewith
Data Source
AI summary
An example of a flow cell includes a first substrate having an active region and a bonding region that is spatially separate from the active region. A polymeric hydrogel is positioned at the active region. The flow cell further includes an interposer having a first side that is attached to the bonding region and having a second side that is opposed to the first side. A light-switchable bonding material is in contact with at least one of the first side or the second side, and a lid or a second substrate is attached to the second side of the interposer.