Nanostructure Array Sensors for Electrochemical Sensing
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Solution Overview
Problem
Existing electrochemical devices face challenges with electrode stability, particularly with composite nanomaterial electrodes that tend to peel off during measurements, and difficulties in forming densely packed electrodes for capacitive sensing and field emission devices.
Innovation Solution
The use of individually addressable nanostructure arrays as nano electrodes, utilizing carbon nanotubes with excellent electrical, thermal, and mechanical properties, and integrating these arrays on a non-conducting substrate with conducting electrical portions to form electrical contacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If composite nanomaterial electrodes are used to increase surface area and sensitivity, then sensing sensitivity is improved, but the electrodes tend to peel off during measurements reducing reliability
Solution Approach 1:
The patent divides the electrode into discrete nanostructure units (carbon nanotubes, nanowires, or nanopores) that are individually addressable. Each nanostructure acts as an independent sensing element with high surface area-to-volume ratio, providing sensitivity while the modular nature prevents peeling by eliminating large composite interfaces.
Solution Approach 2:
The patent transitions from planar 2D electrodes to three-dimensional nanostructure arrays extending vertically from the substrate. This vertical dimension increases effective surface area for sensing while the root-bound nanostructures remain anchored to the substrate, preventing the peeling issue associated with composite nanomaterials.
2Measurement precision
If electrodes are placed close together to achieve high spatial resolution and dense packing, then sensing resolution is improved, but field emission becomes challenging due to arcing in air
Solution Approach 1:
The patent changes the electrical parameters by applying high voltage only locally between adjacent nanostructure pairs rather than across large electrode surfaces. This localized field application enables field emission sensing at close spacing by confining the electric field to narrow gaps where arcing is minimized, while maintaining high spatial resolution through dense nanostructure packing.
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 configuration enhances the sensitivity and resolution of electrochemical, capacitive, and field emission sensing techniques, allowing for efficient multianalyte detection and imaging of chemical compositions with high spatial and chemical resolution.
Implementation Method 1
when a voltage (900) is applied between the at least two nanostructures (207), an electric or electromagnetic field is generated between the said nanostructures
Implementation Method 2
when a voltage (900) is applied between the at least two nanostructures (207), an electric or electromagnetic field is generated between the said nanostructures
Implementation Method 3
a capacitance (700) is formed between the nanostructures
Implementation Method 4
field emission (movement of electrons from one electrode to another via air or vacuums) occurs. When gas molecules or impurities or analytes come between the electrodes, ionization of gases and other matter occurs causing variation of the field emission current
Data Source
AI summary
The present invention relates to utilizing individually addressable nanostructure arrays as nano electrodes for multianalyte electrochemical sensing via utilizing various electrochemical spectroscopy, capacitive and field emission techniques. In certain aspects, the invention provides devices and arrangements comprising at least two individually addressable nanostructures in an array on a substrate, and uses thereof. In other certain aspects, the invention features systems comprising the device and a chip holder, and further comprising hardware and software.