DNA Synthesis Chip Using Electrostatic Reagent Transfer
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Solution Overview
Problem
Traditional DNA synthesis systems are expensive and time-consuming due to limited throughput and wastage of reagents, with smaller reaction wells increasing evaporation risks and challenging fluid handling at small volumes.
Innovation Solution
A reaction substrate with small reaction wells and a reagent transfer system that minimizes evaporation, using electrostatic forces for non-contact fluid transfer and precise delivery of reagents to multiple reaction units on a chip, enabling massively parallel DNA synthesis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional DNA synthesis systems are used, then synthesis can be performed, but throughput is limited and reagent wastage is high
Solution Approach 1:
The system divides the synthesis process into discrete reaction units arranged in arrays, with each unit capable of independent parallel synthesis. Reaction units are segmented into individual wells or chambers that can be independently controlled, allowing simultaneous synthesis of multiple DNA sequences without cross-contamination, thereby increasing throughput while optimizing reagent usage in each compartment.
Solution Approach 2:
Multiple reaction units are combined into a single integrated system on a chip, allowing parallel processing of numerous synthesis reactions simultaneously. The system merges reagent delivery, reaction containment, and detection functions into an integrated platform that handles many reactions in unison, dramatically increasing overall productivity while maintaining precise reagent control.
2Productivity
If smaller reaction wells are used to increase parallelism, then more reactions can be performed simultaneously, but evaporation risk increases and fluid handling becomes challenging
Solution Approach 1:
The system employs microfabricated reaction chambers with controlled geometry and surface properties that minimize surface-area-to-volume ratios, reducing evaporation rates. Thin film structures and sealed microenvironments are used to contain small volumes while maintaining stability, allowing parallelism to be increased without proportionally increasing evaporation losses.
Solution Approach 2:
The system optimizes physical parameters of the reaction environment including temperature control, humidity management, and chamber sealing to prevent evaporation in small-volume wells. By adjusting these parameters dynamically, the system maintains reliable fluid handling even as well sizes are reduced to increase the number of parallel reactions.
3Productivity
If smaller reaction wells are used to increase parallelism, then more reactions can be performed simultaneously, but fluid handling becomes challenging
Solution Approach 1:
The system replaces manual or mechanical fluid handling with automated electronic control systems that precisely deliver reagents to each reaction unit. Integrated circuitry and computer-controlled pumps enable accurate dispensing of small volumes into numerous parallel wells, eliminating the complexity of manual fluid management while maintaining high parallelism.
Solution Approach 2:
The microfluidic system is designed with self-aligning features and automated reagent distribution mechanisms that eliminate the need for precise manual positioning. The system automatically routes reagents to the correct reaction units based on programmed sequences, making operation straightforward even with hundreds of parallel channels.
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 increases DNA synthesis throughput by reducing reagent usage and evaporation, allowing for efficient synthesis in small volumes and high parallelism, thereby enhancing the practicality of DNA synthesis.
Implementation Method 1
using electrostatic forces for non-contact fluid transfer
Data Source
AI summary
DNA synthesis devices, systems, and methods are disclosed. An apparatus can include a synthesizer chip having an array of reaction units in a predetermined pattern, each reaction unit including a reaction surface and a reaction electrode of an IC array of reaction electrodes, and a synthesizer chip controller coupled to the IC array of reaction electrodes configured to address each reaction electrode individually. The apparatus can also include a reagent delivery chip positionable above the synthesizer chip, comprising an array of reagent delivery units arranged in the predetermined pattern, each reagent delivery unit including a reagent electrode of an IC array of reagent electrodes and each reagent delivery unit configured to receive and deliver a droplet of reagent fluid having a volume of 1 picoliter or less, and a reagent delivery chip controller coupled to the IC array of reagent electrodes configured to address each reagent electrode individually.