Elongated Nanostructure Sensor with Selective Dielectric
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Solution Overview
Problem
Existing sensor devices utilizing nanostructures have limited selectivity and sensitivity, especially at low concentrations, making them unreliable for detecting components in fluids.
Innovation Solution
A sensor device comprising at least one elongated nanostructure embedded in a selectively permeable dielectric material, allowing specific components to penetrate and be detected, with the nanostructure capable of sensing these components and featuring improved mechanical strength and selectivity through functionalization and varying dielectric material properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If nanostructures are used in sensor devices, then sensitivity is improved, but selectivity is limited
Solution Approach 1:
A dielectric layer is introduced as an intermediary between the nanostructure and the fluid. This dielectric layer is selectively permeable to specific analytes, allowing them to reach the nanostructure while blocking other substances. The dielectric layer acts as a mediator that enables the nanostructure to maintain high sensitivity while achieving improved selectivity through the filtering function of the dielectric material.
Solution Approach 2:
The sensor device combines multiple materials with different functions: the nanostructure provides sensitivity for detection, while the dielectric material provides selective permeability. This composite structure integrates the advantages of both materials - the high surface-area-to-volume ratio of nanostructures for sensitivity and the selective transport properties of dielectric materials for selectivity - thereby resolving the contradiction between these two parameters.
2Measurement precision
If nanostructures are used in sensor devices, then sensitivity is improved, but reliability is limited
Solution Approach 1:
The dielectric layer serves as a protective intermediary that shields the nanostructure from direct exposure to the fluid environment. This protection enhances the mechanical stability and reliability of the nanostructure while maintaining its sensitivity through the selective permeability of the dielectric material to target analytes.
Solution Approach 2:
The composite structure of nanostructure plus dielectric material combines the high sensitivity of nanostructures with the mechanical robustness and chemical stability of dielectric materials. This composite approach maintains the reliability benefits of conventional sensors while preserving the sensitivity advantages of nanostructures.
3Ease of manufacture
If nanostructures are aligned parallel to substrate, then manufacturing is simplified, but sensing performance is limited
Solution Approach 1:
The invention transitions from two-dimensional planar alignment (parallel to substrate) to three-dimensional vertical alignment (perpendicular to substrate). This dimensional change allows the nanostructure to extend into the fluid phase, maximizing exposure to analytes and improving sensing performance while maintaining manufacturability through vertical growth techniques.
Solution Approach 2:
The nanostructure is positioned to extend vertically from the substrate into the fluid, creating a local region of high analyte interaction at the tip and along the length of the nanostructure. This local optimization of the sensing region enhances detection capability compared to fully planar configurations, while the base remains anchored to the substrate for mechanical support.
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 sensor device demonstrates enhanced sensitivity and selectivity, enabling reliable detection of components in fluids, including gases and liquids, with improved mechanical strength and the ability to differentiate between various components.
Implementation Method 1
the dielectric material having a selective permeability towards a component to be detected in a fluid
Implementation Method 2
the at least one elongated nanostructure having the capability of sensing the component permeated through the dielectric material
Data Source
Figure 1~2
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Figure 5~6
AI summary
The present invention provides a sensor device (20) for determining the presence and/or amount of at least one component in a fluid. The sensor device (20) comprises at least one sensor unit, the at least one sensor unit comprising at least one elongated nanostructure (8) and a dielectric material (9) surrounding the at least one elongated nanostructure (8). The dielectric material (9) is such that it is selectively permeable for one of the at least one component and is capable of sensing the component permeated through the dielectric material (9). The sensor device (20) according to embodiments of the invention shows good sensitivity and good mechanical strength. The present invention furthermore provides a method for manufacturing such a sensor device (20) and a method for determining the presence and/or amount of at least one component in a fluid using such a sensor device (20).