Photonic Nanohole Array Calorimeter for High-Throughput Screening
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Solution Overview
Problem
Conventional calorimetry methods face challenges in accurately measuring energy changes in chemical reactions due to limitations in temperature sensing and data acquisition, particularly in high-throughput screening applications.
Innovation Solution
A micro-calorimetry system utilizing photonic sensor chips with nanohole arrays (NHA) integrated on a substrate, combined with a transient thermal increase mechanism and advanced data processing, to measure extraordinary optical transmission (EOT) and calculate calorimetry measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional temperature sensors (thermocouples, thermopiles, thermistors) are used for calorimetry measurements, then the measurement system is simple to implement, but the measurement precision and response speed are insufficient for high-throughput screening applications
Solution Approach 1:
The patent replaces conventional mechanical/electrical temperature sensors (thermocouples, thermopiles, thermistors) with an optical sensing system. The photonic sensor chip with nanohole arrays detects temperature-induced changes in extraordinary optical transmission (EOT), substituting electrical measurement mechanisms with optical field interactions to achieve higher precision and faster response.
Solution Approach 2:
The patent changes the measurement parameter from direct electrical resistance or voltage signals to optical transmission characteristics. By monitoring changes in EOT intensity and spectral position as functions of temperature, the system achieves enhanced measurement precision while maintaining manageable device complexity through well-established optical measurement techniques.
2Productivity
If conventional calorimetry methods are used, then the equipment is simple, but the productivity and throughput are insufficient for high-throughput screening
Solution Approach 1:
The patent segments the measurement system into modular components: multiple photonic sensor chips can be used in parallel, each capable of independent measurement. The optical detection system can simultaneously monitor multiple wells or samples, enabling high-throughput screening while keeping individual sensor units relatively simple and manageable.
Solution Approach 2:
The photonic sensor chip with nanohole arrays serves multiple functions: temperature sensing, energy change detection, and spectral characterization. This multi-functionality reduces the need for separate specialized equipment for different measurement types, thereby increasing productivity without proportionally increasing overall system complexity.
3Measurement precision
If photonic sensor chips with nanohole arrays are used, then the measurement precision and response speed improve, but the manufacturing precision requirements increase
Solution Approach 1:
The patent changes the fabrication approach by defining specific parameter ranges for nanohole dimensions (e.g., 50-200 nm diameter, specific pitch values) that balance measurement precision with manufacturability. By optimizing these parameters, the system achieves high measurement precision while remaining compatible with standard nanofabrication techniques like electron beam lithography or focused ion beam methods.
4Productivity
If transient thermal increase is applied to achieve fast measurements, then the productivity increases, but the reliability of measuring small energy changes may decrease
Solution Approach 1:
The patent implements feedback through continuous monitoring of EOT intensity and spectral position during the transient thermal process. By tracking these optical parameters as functions of time and temperature, the system can distinguish between thermal effects and actual energy changes from reactions, maintaining reliability while achieving fast measurements through the controlled transient approach.
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 system enables precise and efficient measurement of energy changes in chemical reactions, supporting high-throughput screening and providing valuable thermodynamic data for drug discovery and material analysis.
Implementation Method 1
measuring, via a light detector, transmission of light through plural nanohole array (NHA) sensors to obtain a series of optical transmission measurements
Implementation Method 2
A heater is in thermal contact with each of the plurality of wells. A heater controller is coupled to the heater, the heater controller programmed to control the heater to apply a transient thermal increase to each well, to increase the temperature within the well at a known heat rate
Data Source
AI summary
A system for calorimetry includes a plurality of wells disposed upon a well plate, an input feature to deposit a sample within each well, and light sources configurable to irradiate each of the wells in the well plate, and their samples, with incident light. A photonic sensor chip at a bottom of each well includes a plural nanohole array sensor on a substrate. A light detector positioned below the well is configured to measure the transmission of light through the sensors, obtaining a series of optical transmission measurements. A heater is in thermal contact with each of the wells, applying a transient thermal increase to each well, and the sample therein, at a known heat rate. A processor is configured to calculate a measurement for each well as a function of the series of optical transmission measurements and the transient thermal increase, the measurement being indicative of the sample within the well undergoing a change in response to the transient thermal increase, the change relating to a property of the sample.