Functionalized Plasmonic Nanostructures with Hydrogel-Spaced Primers
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Solution Overview
Problem
Existing methods for detecting and analyzing reactions on local support surfaces or within reaction chambers lack efficient enhancement of optical signals, particularly in sequencing protocols, due to limitations in signal detection and enhancement techniques.
Innovation Solution
The use of plasmonic nanostructures anchored to a polymeric hydrogel with primers at varying distances, which enhance optical signals by positioning optical labels in a signal-enhancing proximity to the nanostructure core, thereby improving fluorescence detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical labels are positioned close to the detection surface, then signal detection sensitivity improves, but optical signals are quenched
Solution Approach 1:
A polymeric hydrogel layer is introduced as an intermediary between the plasmonic nanostructure core and the optical labels (fluorophores). This hydrogel matrix positions the fluorophores at optimized distances from the metal surface, preventing quenching while maintaining proximity for plasmonic enhancement. The hydrogel acts as a spacer that mediates the interaction between the metal surface and optical labels, resolving the contradiction between needing close proximity for signal enhancement and needing distance to avoid quenching.
Solution Approach 2:
The patent utilizes surface plasmon resonance, a parameter change in optical properties, to enhance fluorescence signals. By tuning the plasmonic resonance of the metal nanostructure to match the excitation or emission wavelengths of the fluorophores, the system achieves signal enhancement without requiring direct contact between the fluorophore and metal surface, thus avoiding quenching while maintaining sensitivity.
2Ease of manufacture
If flow cell substrate preparation is simplified, then manufacturing efficiency improves, but control over primer positioning may be reduced
Solution Approach 1:
Primers are pre-grafted onto the polymeric hydrogel matrix before the hydrogel is attached to the flow cell substrate. This preliminary action ensures that primers are already positioned at optimized distances from the plasmonic nanostructure core within the hydrogel matrix, maintaining manufacturing precision. The pre-grafting step allows primers to be incorporated into the hydrogel structure in controlled positions, and this positioning is preserved when the hydrogel is subsequently attached to the flow cell, thus simplifying the overall manufacturing process without sacrificing positioning control.
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
Enhances optical signals during imaging events in sequencing protocols by preventing quenching and increasing plasmonic enhancement, simplifying flow cell substrate preparation, and improving signal detection efficiency.
Implementation Method 1
the plasmonic nanostructure core to enhance optical signals from these particular optical labels
Implementation Method 2
a polymeric hydrogel attached to the plasmonic nanostructure core, the polymeric hydrogel having a thickness ranging from about 10 nm to about 200 nm
Data Source
Figure 1A~1B
Figure 2A
Figure 2B~2C
AI summary
An example of a functionalized plasmonic nanostructure includes a plasmonic nanostructure core; a polymeric hydrogel attached to the plasmonic nanostructure core, the polymeric hydrogel having a thickness ranging from about 10 nm to about 200 nm; and a plurality of primers attached to side chains or arms of the polymeric hydrogel, wherein at least some of the plurality of primers are attached to the polymeric hydrogel at different distances from the plasmonic nanostructure core.