LSPR Sensor Nanoparticle Separating Layer
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Solution Overview
Problem
Existing nanoparticle-based sensing platforms face limitations in sensitivity and durability when exposed to harsh environments, as they require direct contact with the sensing medium, which can lead to intermixing and alloy formation, and lack versatility in material application and protection for the sensing nanoparticles.
Innovation Solution
An arrangement comprising a nanoparticle-based sensing structure supporting localized surface plasmon resonance (LSPR), a sensing material that interacts with the environment, and a thin separating layer that protects the nanoparticle structure from the environment, allowing for indirect sensing and maintaining high sensitivity even in harsh conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the nanoparticle sensing structure is placed in direct contact with the sensing medium, then the sensitivity of detection is improved, but the durability and stability deteriorate due to intermixing and alloy formation in harsh environments
Solution Approach 1:
The sensor system is divided into distinct functional segments: the LSPR-active nanoparticle sensing structure, the separating layer, and the sensing material. This segmentation allows the nanoparticle to maintain its optical properties while the separating layer protects it from direct contact with harsh sensing environments, resolving the contradiction between sensitivity and durability
Solution Approach 2:
A separating layer acts as an intermediary between the nanoparticle sensing structure and the sensing material. This intermediary layer enables indirect sensing by allowing optical field interaction while preventing physical contact and intermixing, thus maintaining both sensitivity (through optical coupling) and durability (through physical protection)
2Reliability
If a separating layer is introduced to protect the nanoparticle structure, then the durability and stability are improved, but the sensitivity may deteriorate due to reduced interaction with the sensing medium
Solution Approach 1:
A thin separating layer film is used to protect the nanoparticle while maintaining optical interaction. The thin film configuration allows the optical field to penetrate and interact with the sensing material through the layer, preserving sensitivity while providing the durability benefits of physical separation and protection
3Device complexity
If direct contact between nanoparticle and sensing material is used, then the simplicity of the device is maintained, but the versatility in material application deteriorates due to limitations in protecting the sensing nanoparticles
Solution Approach 1:
The separating layer serves multiple functions simultaneously: it protects the nanoparticle from chemical intermixing, provides mechanical support, enables versatile material combinations, and maintains optical coupling. This multi-functionality increases device versatility without significantly complicating the overall structure, as the separating layer is an integral part of the sensor design
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 enables remote, real-time, and ultra-high sensitivity measurements of structural, chemical, and temperature changes, protecting the nanoparticles from harsh environments and allowing for the use of various materials, while maintaining the sensitivity of LSPR-based sensors, and enabling applications such as hydrogen sensing and catalytic reaction monitoring.
Implementation Method 1
at least one nanoparticle based sensing structure supporting localized surface plasmon resonance (LSPR)
Data Source
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Figure 3
AI summary
The invention concerns an arrangement comprising at least one sensor nanoparticle supporting Localized Surface Plasmon Resonance (LSPR), at least one sensing material and at least one separating layer which separates the at least one sensor nanoparticle from the at least one sensing material. The arrangement allows for indirect sensing studies of change in and on the surface of a sensing material or environment by the sensor nanoparticle. The arrangement may also be used for optical temperature measurements and calorimetry, optical differential scanning calorimetry (DSC), to study hydrogen storage, catalytic reactions or for NOx sensing.