Magnetochemical Sensor Current Path for Magnetic Particle Capture
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Solution Overview
Problem
Magnetochemical sensors face challenges in detecting magnetic particles due to their small size and the need to bring them into close proximity to the sensor to detect their magnetic fields effectively.
Innovation Solution
A current-carrying structure is used to create a magnetic field that attracts magnetic particles towards the magnetochemical sensor, enhancing the likelihood of detection by drawing them closer to the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic particles are made small to improve detection sensitivity, then measurement precision is improved, but the magnetic field strength decreases making detection more difficult
Solution Approach 1:
A current-carrying structure is introduced as an intermediary element between the magnetic particles and the magnetochemical sensor. This structure generates a magnetic field that actively attracts and concentrates magnetic particles onto the sensor surface, mediating the interaction between the weak magnetic signal from small particles and the detection mechanism, thereby enabling detection of particles that would otherwise be too small to detect
2Measurement precision
If magnetic particles are brought into close proximity to the sensor to improve detection, then measurement precision is improved, but the device complexity increases
Solution Approach 1:
The mechanical challenge of physically positioning tiny magnetic particles close to the sensor is replaced by using a magnetic field generated by a current-carrying structure. Instead of mechanically manipulating particles or positioning them precisely, the electromagnetic field automatically draws particles onto the sensor surface, substituting a complex mechanical positioning problem with a simpler electromagnetic attraction mechanism
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 solution increases the probability of detecting magnetic particles by ensuring they are in closer proximity to the sensor, improving detection efficiency.
Implementation Method 1
A current-carrying structure is used to create a magnetic field that attracts magnetic particles towards the magnetochemical sensor
Implementation Method 2
a current-carrying structure that, when current passes through it, creates a magnetic field that draws magnetic particles toward the magnetochemical sensor
Implementation Method 3
Magnetochemical sensors can be used in various applications to detect the presence of a chemical or biological agent by, for example, detecting the presence of a magnetic particle coupled to the chemical or biological agent
Data Source
AI summary
A device may include a fluid region. A device may also include a magnetochemical sensor for detecting magnetic particles in the fluid region, wherein the magnetochemical sensor comprises: a first ferromagnetic layer, a second ferromagnetic layer, and a spacer layer situated between and coupled to the first ferromagnetic layer and the second ferromagnetic layer. A device may further include a current-carrying structure for drawing the magnetic particles in the fluid region toward the magnetochemical sensor, wherein: the current-carrying structure consists of a single, undivided structure, and the current-carrying structure is configured to carry a current in at least one direction that is substantially parallel to an in-plane axis or a longitudinal axis of the magnetochemical sensor. The magnetochemical sensor may be one of a plurality of magnetochemical sensors in a sensor array.