Multi-Resonant Acoustic Interfacial Sensor for Depth-Resolved Analysis
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Solution Overview
Problem
Current sensing mechanisms are limited in their ability to interrogate interfacial areas at different depths and spatial resolutions, particularly in biological, chemical, and physical processes, which hinders the understanding and monitoring of complex interactions such as biocompatibility, drug interaction, and nanotechnology.
Innovation Solution
A multi-resonant acoustic interfacial analyzer (MAIA) sensor that can be excited at various frequencies to interrogate interfaces at different depths, providing information on mechanical properties like viscosity, density, and elasticity through changes in resonance features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a standard sensing mechanism is used to detect the presence of certain objects, then a single information input is obtained for a specific portion of the interfacial area, but the capability to interrogate the interfacial area at different distances or spatial resolutions is lost
Solution Approach 1:
The sensor is excited at multiple operating frequencies, allowing the penetration depth to be dynamically adjusted. By varying the excitation frequency, the sensor can interrogate different depths of the interfacial area, transforming a static single-depth measurement system into a dynamic multi-depth system that adapts to different measurement requirements
Solution Approach 2:
The patent changes the operating parameter (frequency) of the sensor to achieve different penetration depths. By sweeping through multiple frequencies, the system obtains information from different depths of the interfacial area, effectively using parameter variation to overcome the limitation of single-depth interrogation
2Length of stationary object
If optical methods with a given frequency are used, then a depth of penetration of 0.5-0.8 micrometers is achieved, but the capability to provide information at different depths is limited
Solution Approach 1:
Instead of using a fixed frequency optical method, the patent employs a sensor that can be excited at multiple frequencies. This dynamic frequency adjustment allows the penetration depth to vary, enabling interrogation at different depths while maintaining the advantages of optical sensing
Solution Approach 2:
The sensing mechanism is designed to perform multiple functions by operating at different frequencies. A single sensor system can provide information from multiple depths, making it a universal tool that replaces the need for multiple fixed-frequency sensors
3Length of stationary object
If electrical methods with electrodes are used, then a depth of penetration of tens of microns is achieved, but the spatial resolution is very limited
Solution Approach 1:
The patent replaces the electrical electrode-based sensing mechanism with an optical sensing approach. This substitution maintains the ability to achieve sufficient penetration depth while dramatically improving spatial resolution, as optical methods can provide nanometer-scale resolution compared to the limited resolution of electrical methods
4Length of stationary object
If acoustic techniques are used, then a single-depth interrogation is achieved, but the capability to resolve nanometer-scale features is lost
Solution Approach 1:
The acoustic sensor is excited at multiple frequencies, allowing dynamic adjustment of the interrogation depth. This frequency variation enables the system to resolve nanometer-scale features at different depths, transforming a single-depth acoustic technique into a multi-depth high-resolution technique
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 detailed analysis of interfacial processes with high spatial and temporal resolutions, allowing for the characterization of complex interactions and processes at nanometer to micrometer scales, enhancing the understanding and monitoring of biological and chemical interactions.
Implementation Method 1
The sensor is excited at multiple operating frequencies which enable the sensor to provide information at different distances, or penetration depths, from the sensor
Implementation Method 2
A multi-resonant acoustic interfacial analyzer (MAIA) sensor that can be excited at various frequencies to interrogate interfaces at different depths, providing information on mechanical properties like viscosity, density, and elasticity through changes in resonance features
Data Source
AI summary
A sensor is disclosed for analyzing information, such as interfacial interactions, found in various systems. A sensor is located proximate to an interface that is to be studied. The sensor is actuated in order to produce acoustical signals. The frequency of oscillation of the sensor is varied in order to enable the sensor to produce acoustical signals at different harmonics. The different acoustical signals are used to analyze the system at various distances from the surface of the sensor.