Autonomous Potentiostat Housing for Closed-Loop Bioelectronic Actuation
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Solution Overview
Problem
Conventional potentiostats are bulky, tethered, and lack real-time actuation capabilities, making them unsuitable for autonomous operation in fluid environments and bioreactor systems, with a fabrication gap between rigid electronic components and delicate biological systems.
Innovation Solution
A compact, sealed, and wirelessly powered system integrating a three-electrode potentiostat, autonomous firmware, and genetically engineered biological payloads within a modular housing, capable of performing real-time electrochemical sensing and actuating engineered cells through programmable electrogenetic actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If conventional potentiostats are used, then electrochemical measurements can be performed, but the system becomes bulky and tethered, reducing flexibility and autonomy
Solution Approach 1:
The patent merges the potentiostat electronics, power source, and control firmware into a single integrated compact unit that can operate autonomously without external tethers. The PCB-based design combines all necessary components (potentiostat board, microcontroller board, power controller board, and battery) into one self-contained system that performs electrochemical measurements independently
Solution Approach 2:
The system is segmented into modular PCB boards that can be independently designed and assembled. The potentiostat functionality, control logic, and power management are separated onto different boards, allowing for optimized design of each module while maintaining overall compact integration
2Productivity
If conventional potentiostats are used, then electrochemical control is available, but real-time actuation capabilities are lacking
Solution Approach 1:
The system implements real-time feedback control where the microcontroller continuously monitors electrochemical data from the potentiostat and automatically triggers actuation signals when predefined conditions are met. This closed-loop feedback enables rapid response to environmental changes without manual intervention
Solution Approach 2:
The autonomous firmware is pre-programmed with actuation protocols and decision logic that are executed immediately when sensing conditions are satisfied. This preliminary preparation of control logic enables rapid real-time actuation without delay for manual programming or configuration
3Reliability
If rigid electronic components are used, then structural stability is maintained, but compatibility with delicate biological systems is reduced
Solution Approach 1:
The patent introduces a hydrogel matrix as an intermediary medium between the rigid electrode and the delicate engineered cells. The hydrogel provides a soft, biocompatible environment that mechanically cushions the cells while still allowing electrical signals to be transmitted from the electrode to the cells for actuation
4Volume of moving object
If compact sealed housing is used, then portability and immersion capability are improved, but fabrication complexity increases
Solution Approach 1:
The housing utilizes flexible sealing elements and thin-film PCB boards that can be conformally sealed within the compact housing. The flexible nature of these components allows them to be manufactured in small volumes while maintaining seal integrity, reducing the overall housing size without compromising protection
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 fully autonomous, closed-loop operation in fluid environments without continuous human oversight, supporting modular components and remote data transmission, with dynamic responsiveness to environmental changes.
Implementation Method 1
applying an oxidative potential to the working electrode to initiate electrodeposition of a hydrogel matrix onto the working electrode surface
Implementation Method 2
applying an oxidative potential to the working electrode to initiate electrodeposition of a hydrogel matrix
Data Source
AI summary
In accordance with the present disclosure, a method for autonomous biological sensing and actuation, includes: placing a printed circuit board (PCB) unit comprising a power controller board, microcontroller board, potentiostat board, and a power source, inside a watertight housing; connecting an electrode sensor to the potentiostat board and securing the electrode sensor to the watertight housing, the electrode sensor comprising a working electrode configured to be exposed to an external environment; sealing the watertight housing to enclose the PCB unit and power source while maintaining exposure of the working electrode to the external environment; immersing the sealed watertight housing into a thiolated hydrogel solution; applying an oxidative potential to the working electrode to initiate electrodeposition of a hydrogel matrix onto the working electrode surface; analyzing electrochemical data acquired from the electrode sensor through autonomous firmware; and applying an actuation signal to the working electrode based on the analyzed electrochemical data.