Diamond Thermometry Probe with Thermal Isolation for Nanoscale Sensing
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Solution Overview
Problem
Existing nanoscale thermometry methods face challenges with heat dissipation and spatial resolution when using larger diamond probes, leading to poor sensitivity and quantitative assessment of highly conductive materials like metals.
Innovation Solution
A microscale single diamond sensor probe with a pointed sensing tip and thermal isolation barrier, thermally decoupling the probe from the detection system, to minimize heat diffusion and enhance spatial resolution and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If larger diamond probes are used for nanoscale thermometry, then robustness and scalability are improved, but heat dissipation increases leading to poor spatial resolution and sensitivity
Solution Approach 1:
The diamond probe is segmented into a microscale bulk diamond for robustness and a nanoscale sensing tip for high spatial resolution. This segmentation allows the probe to combine the mechanical strength of larger structures with the measurement precision of smaller structures, resolving the contradiction between robustness and spatial resolution.
Solution Approach 2:
Different parts of the diamond probe have different functional qualities: the bulk diamond provides mechanical robustness while the nanoscale tip provides high spatial resolution for thermal measurements. This local differentiation of quality allows simultaneous achievement of both robustness and measurement precision.
2Productivity
If larger diamond probes are used, then scalability is improved, but thermal conduction increases acting as a heat sink
Solution Approach 1:
The probe structure segments the diamond material into a microscale bulk portion for scalability and a nanoscale sensing portion for minimal heat dissipation. This segmentation enables the system to benefit from the scalability of larger structures while avoiding the excessive heat sink effect that would otherwise occur.
3Adaptability or versatility
If conventional SThM probes are used on highly conductive materials, then measurement coverage is improved, but sensitivity decreases due to comparable thermal conductivity
Solution Approach 1:
The probe utilizes diamond's exceptionally high thermal conductivity parameter (1-3 kW/(m*K)), which is significantly higher than conventional silicon probes. This parameter change enables the probe to effectively measure highly conductive materials like metals by providing sufficient thermal contrast, thereby improving sensitivity while maintaining broad measurement coverage.
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 solution provides high thermal sensitivity and quantitative measurements at nanometre spatial resolution, overcoming heat dissipation issues and enabling accurate temperature measurement of highly conductive materials.
Implementation Method 1
diamond-based colour centre thermometry provides a significant advantage over conventional thermometry methods as it allows for sensitive and quantitative temperature measurements
Implementation Method 2
a thermal isolation barrier, positioned to reduce heat diffusion to the detection system
Data Source
AI summary
A nanoscale temperature detector including a diamond sensing probe with a transverse dimension of at least 200 nanometres and a sensing tip-having a curvature radius of less than 100 nanometres, less than 10 nanometres or less than 1 nanometre, and a plurality of colour centres, whose emission count rate show temperature-sensitive features. The diamond sensing probe has a transverse dimension of at least 200 nanometres and is connected to a to a detector system by means of a mounting structure. A thermal isolation barrier thermally decouples the sensing probe from the detector system.