Bubble-Brightening Microfluidic Ion Chip for Trace Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing microfluidic chips struggle to detect ions at extremely low concentrations due to insufficient brightness of the liquid, limiting their detection capabilities.
Innovation Solution
A microfluidic ion detection chip with a bubble brightening structure, comprising a substrate, upper plate, glass cover plates, and a foam board with a foaming structure and surfactant, enhances liquid brightness by generating bubbles in the gas flow channel using a gas pump, improving detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If microfluidic chip size is reduced for portability, then device compactness is improved, but liquid brightness for optical detection deteriorates
Solution Approach 1:
The patent introduces gas bubbles as an intermediary substance between the liquid sample and the optical detection system. These bubbles act as a mediator that enhances light scattering and reflection, thereby amplifying the optical signal from the liquid without requiring increased liquid volume or concentration. The bubbles serve as a bridge that converts the weak optical signal from trace ions into a detectable bright signal.
Solution Approach 2:
The patent changes the physical state of the detection medium by introducing gas-phase bubbles into the liquid-phase sample. This phase change creates a two-phase flow system where the gas-liquid interface provides enhanced optical properties. The parameter change from single-phase liquid to two-phase gas-liquid mixture fundamentally alters the light-matter interaction, enabling detection of trace ions at ultra-low concentrations.
2Device complexity
If conventional optical detection is used without bubble enhancement, then device structure is kept simple, but detection sensitivity deteriorates
Solution Approach 1:
Gas bubbles are introduced as an intermediary element that enhances optical detection without fundamentally redesigning the detection system. The bubbles naturally form at the gas-liquid interface and provide enhanced light scattering properties, allowing conventional optical detectors to achieve ultra-sensitive detection capabilities without complex modifications.
Solution Approach 2:
The patent utilizes the phase transition between gas and liquid phases to create a two-phase flow system. By introducing gas phase bubbles into the liquid sample stream, the system exploits the optical properties of gas-liquid interfaces to enhance light scattering and reflection. This phase transition approach enables significant sensitivity improvement while maintaining relatively simple device architecture.
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 bubble brightening structure effectively increases liquid brightness, enhancing detection sensitivity and reducing the limit of detection for low-concentration ions.
Implementation Method 1
the foam board is provided with a foaming structure capable of generating bubbles
Implementation Method 2
Gas is introduced into the gas flow channel through a gas pump
Implementation Method 3
a surfactant coated on the foam board
Implementation Method 4
the glass cover plates are configured for cooperating with ion optical detection
Implementation Method 5
mixed liquid generates bubbles at the upper optical detection through hole and the lower optical detection through hole to achieve a brightening function
Data Source
AI summary
A microfluidic ion detection chip having a bubble brightening structure includes a substrate, an upper plate, two glass cover plates, and a foam board. The substrate is provided with a fluid mixing region, a lower optical detection through hole, and a lower gas flow channel. The upper plate is adhesively connected to the substrate and is provided with a sample outlet, an upper optical detection through hole, an upper gas flow channel, and two sample inlets, the upper gas flow channel and the lower gas flow channel are combined to form a gas flow channel. The two glass cover plates are respectively disposed at the lower optical detection through hole and the upper optical detection through hole. The foam board is provided with a foaming structure capable of generating bubbles and a surfactant coated on the foam board, the foam board is disposed at the gas flow channel.