Single Molecule Arrays via Nanosphere Patterning
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Solution Overview
Problem
Current methods for single-molecule experiments, such as DNA sequencing and biomolecule detection, are limited by Poisson statistics and require expensive, specialized equipment for fabrication, hindering high-throughput and efficiency.
Innovation Solution
The development of single molecule arrays using bottom-up self-assembly processes, specifically Nanosphere Patterning (NP), allows for cleanroom-free fabrication of DNA origami grids with high precision, overcoming Poisson limitations and enabling efficient, high-throughput single-molecule experiments by creating ordered grids of binding sites for precise DNA origami placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional top-down nanofabrication methods are used, then manufacturing precision can be achieved, but device complexity and cost increase significantly requiring cleanroom facilities and specialized equipment
Solution Approach 1:
The patent inverts the conventional top-down fabrication approach by using bottom-up self-assembly. Instead of creating binding sites through complex lithographic processes, the invention uses nanospheres as templates that define binding site locations, then removes the nanospheres to leave behind simple binding sites. This reverses the complexity burden from the binding site creation process to the nanosphere removal process, which is much simpler.
Solution Approach 2:
The patent introduces nanospheres as intermediary objects that temporarily occupy the spaces where binding sites will eventually form. These nanospheres serve as simple, easily removable templates that simplify the overall fabrication process by decoupling the complexity of precise positioning from the final binding site creation.
2Productivity
If stochastic loading methods are used for single-molecule components, then experimental setup is simplified, but occupancy and throughput are limited by Poisson statistics
Solution Approach 1:
The patent performs preliminary action by pre-forming binding sites in precise, regular patterns before introducing DNA origami molecules. This ensures that binding sites are ready and waiting in predetermined locations, eliminating the stochastic nature of loading and enabling deterministic, high-occupancy assembly of single-molecule components into arrays.
3Measurement precision
If qPCR is used for nucleic acid detection, then sensitivity is high, but equipment cost and operational complexity increase due to thermal cycling requirements
Solution Approach 1:
The patent replaces the mechanical thermal cycling system of qPCR with a static, isothermal detection platform. DNA origami structures serve as stable, room-temperature binding platforms that eliminate the need for thermal cycler equipment, while maintaining detection sensitivity through precise molecular recognition at the nanoscale.
4Measurement precision
If DNA microarray technology is used for in situ detection, then sensitivity for microbe presence is achieved, but quantification of viral loads fails due to diffusion limitations
Solution Approach 1:
The patent applies local quality by creating discrete, spatially-separated binding sites on DNA origami structures. Each binding site acts as an independent detection zone that traps and concentrates target molecules locally, preventing diffusion away from the detection site while enabling individual quantification of bound molecules through their spatial distribution across the array.
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 approach significantly increases the efficiency of single-molecule experiments, achieving >95% occupancy of DNA origami in Zero Mode Waveguides and enabling ultra-sensitive, quantitative biomolecule detection and sequencing at lower costs and with simpler equipment.
Implementation Method 1
the binding sites have diameters formed by a plurality of regularly spaced removable nanospheres deposited on and in contact with the glass substrate prior to application of the organosilane base layer
Implementation Method 2
a organosilane base layer deposited onto the glass substrate
Implementation Method 3
an artificial nucleic acid nanostructure layer comprising a plurality of individual nucleic acid molecules bound to silanol groups on the glass substrate within the plurality of regularly spaced binding sites
Data Source
AI summary
Embodiments of the present disclosure relate generally to single molecule arrays. More particularly, the present disclosure provides materials and methods for generating single molecule arrays using bottom-up self-assembly processes. Materials and methods of the present disclosure can be used to generate single molecule arrays with nanoapertures (e.g., zero mode waveguides) and for carrying out rapid, point-of-care biomolecule detection and quantification.