Mesoscopic Sensor Relaxation Time Analysis
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Solution Overview
Problem
Current sensors are inadequate for detecting measurands at the mesoscopic level, requiring highly sensitive and responsive technologies to effectively interact with molecules and other small entities.
Innovation Solution
A DOS-sensitive sensor method utilizing a mesoscopic probe element with an electroactive surface, capacitively coupled to a conductive connection, generates time-dependent electrical signals to detect changes in relaxation time, correlating with interactions between the surface and the environment, allowing for highly sensitive detection of measurands through time-dependent measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional sensors are used, then device complexity is reduced, but measurement precision deteriorates for mesoscopic level detection
Solution Approach 1:
The patent transitions from conventional DC-based sensing to AC/pulsed time-dependent measurements, adding a temporal dimension to the measurement process. This enables detection of relaxation time changes that occur when measurands interact with the electroactive surface, providing new sensitivity mechanisms without fundamentally redesigning the sensor structure.
Solution Approach 2:
The patent measures changes in relaxation time as a key parameter when measurands interact with the sensor. By monitoring temporal characteristics rather than just steady-state electrical properties, the system achieves enhanced detection sensitivity for mesoscopic objects while using standard sensor architectures.
2Measurement precision
If sensor size is reduced for mesoscopic detection, then productivity and scalability improve, but measurement precision deteriorates due to noise and quantum effects
Solution Approach 1:
The patent employs AC or pulsed electrical signals instead of continuous DC signals. This periodic excitation enables differentiation between signal and noise through frequency domain analysis, improving signal-to-noise ratio in miniaturized sensors where quantum fluctuations and thermal noise are significant.
Solution Approach 2:
The patent measures dynamic relaxation processes rather than static electrical properties. By observing how the system responds to time-varying stimuli and measures the characteristic relaxation time, the sensor achieves high sensitivity in small dimensions where static measurements would be dominated by noise.
3Measurement precision
If time-dependent measurements are implemented, then measurement precision improves for DOS detection, but loss of time increases due to additional measurement steps
Solution Approach 1:
The patent uses continuous AC or pulsed excitation signals that continuously probe the system's relaxation characteristics. This eliminates the need for separate measurement steps for different parameters, as the time-dependent signal simultaneously provides information about electrical properties and DOS through relaxation time analysis.
Solution Approach 2:
The time-dependent measurement approach serves multiple functions: it characterizes electrical properties, detects DOS changes, and identifies measurand interactions all through a single measurement modality. This multi-functionality reduces the total measurement time compared to sequential specialized measurements.
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
This approach enables highly sensitive and scalable detection of measurands, integrating well with CMOS technology and allowing for miniaturization, effectively addressing the need for sensitive detection at the mesoscopic level.
Implementation Method 1
The first terminal is coupled with the second terminal via a conductive connection such that no biasing potential exists between the first and second terminals. The conductive connection is capacitively couplable to the environment via the mesoscopic probe element
Data Source
AI summary
A sensing method is described. The sensing method comprises providing a time-dependent electrical signal across a conductive connection between first and second terminals of a sensor, the conductive connection capacitively coupled to an environment via a mesoscopic probe element having an electroactive surface for exposure to the environment, the conductive connection having an associated relaxation time. The method further comprises receiving a time-dependent response signal from the sensor. The method further comprises analysing the time-dependent response signal with respect to the time-dependent electrical signal. The method further comprises determining, based on the analysis, a change in the relaxation time, the change in the relaxation time being correlated with an interaction between the electroactive surface and a measurand of the environment. A computer-readable medium, a sensing system and a sensor are also described.