Time-Resolved Biochip Analysis for Target Molecule Characterization
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Solution Overview
Problem
Current methods for evaluating target molecule characteristics in nanobiotechnology, such as the switchSENSE method, face challenges in precision and reliability, particularly in distinguishing between target molecules of different sizes and in routine applications, where frequency response measurements can fail to differentiate between molecules.
Innovation Solution
A time-resolved measurement approach is adopted, analyzing the switching process between standing and lying configurations of probe molecules to determine target molecule characteristics, including size and charge, using an apparatus with an analysis module to process signals and provide reliable results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency response measurements are used to evaluate target molecule characteristics, then the measurement process is simple and quick, but the precision and reliability are insufficient to distinguish between target molecules of different sizes
Solution Approach 1:
The patent segments the measurement process into multiple distinct phases: applying external fields of different polarities, observing switching behavior in each phase, and analyzing the combined signals separately. This segmentation allows extraction of multiple characteristics (size, charge, binding affinity) from the same probe molecule system, thereby improving measurement precision without requiring multiple different apparatuses
Solution Approach 2:
The patent transitions from single-dimension frequency response measurements to multi-dimensional characterization by incorporating time-resolved signal analysis across different field polarities. This dimensional expansion enables distinction between molecules of similar sizes through their different switching dynamics and charge responses, significantly enhancing measurement precision
2Reliability
If label-free detection method is used, then the detection process is simplified and cost-reduced, but the reliability in routine applications is compromised
Solution Approach 1:
The patent implements feedback mechanisms where the switching behavior of probe molecules under external fields provides real-time information about target molecule characteristics. The system continuously monitors and analyzes the time-dependent signals, adjusting the interpretation based on observed switching patterns, thereby maintaining high reliability in routine applications without complex implementation
Solution Approach 2:
The patent utilizes changes in physical parameters (external field polarity, field strength, observation time) to extract multiple characteristics from the same label-free detection system. By varying these parameters and analyzing the responses, the system achieves reliable differentiation of target molecules while maintaining the simplicity and cost-effectiveness of label-free detection
3Measurement precision
If time-resolved measurement approach is adopted to improve precision, then the characterization accuracy increases, but the measurement time and complexity increase
Solution Approach 1:
The patent maintains continuous measurement throughout the probe molecule switching process by continuously monitoring the marker signal as the probe transitions between configurations. This continuous observation captures the complete time-dependent behavior without interruption, enabling accurate differentiation of target molecules while minimizing total measurement time through efficient use of the switching dynamics
Solution Approach 2:
The patent employs periodic application of external fields with alternating polarities to drive the probe molecules through repeated switching cycles. By analyzing the periodic response patterns and time-dependent signals across multiple cycles, the system achieves high precision in target molecule characterization while keeping individual measurement cycles relatively short
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 method enhances the precision and reliability of target molecule characterization, allowing for quick and robust analysis, capable of distinguishing between different target molecules and providing reliable results suitable for commercial applications in various industries and laboratories.
Implementation Method 1
The probe molecule has a marker allowing to generate signals indicative of the distance of a second portion, e.g. the distal end of the probe molecule from the substrate
Implementation Method 2
the probe molecule is subjected to an external AC field. Since the probe molecule is charged, depending on the current polarity of the external field, said second portion of the probe molecule which is not directly attached to the substrate will approach or move away from the substrate
Data Source
AI summary
Arrangements are described for evaluating characteristics of target molecules. A biochip is received which includes a substrate to which charged probe molecules are attached. The probe molecules have a marker to allow generating signals indicative of the distance of a portion of the probe molecule from the substrate. The signals are detected and means for an external electric field is generated to which the probe molecules are exposed. A control means acts to: (A) apply an external electric field causing the portion of the probe molecule to approach the substrate, and (B) apply an external electric field causing the portion of the probe molecule to move away from the substrate. The signal is recorded as a function of time during step (A) and/or step (B). Steps (A) and (B) are repeated for a predetermined number of times and the recorded signals are combined.