Microchannel Structural Design For a Room-Temperature Liquid Metal Based Super-stretchable Sensor.
Qinwu Gao1,2, Hui Li3, Jinjie Zhang1
1Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, Shenzhen, 518055, China.
Scientific Reports
|April 13, 2019
Summary
A novel ultra-soft stretchable sensor utilizes Eutectic Galium-Indium (EGaln) liquid metal in microfluidic channels. This skin-mountable device demonstrates high sensitivity and stretchability, reaching a gauge factor of 4.95 at 550% strain.
Area of Science:
- Materials Science
- Microfluidics
- Wearable Technology
Background:
- Room-temperature liquid metals are crucial for flexible and stretchable sensors.
- Existing methods focus on embedding liquid metal in various forms like microchannels or nanoparticles.
Purpose of the Study:
- To develop a facile, high-sensitivity, skin-mountable, and ultra-soft stretchable sensor using liquid metal.
- To optimize microfluidic channels for enhanced conformability and stretchability.
Main Methods:
- Fabrication of an Eutectic Galium-Indium (EGaln) liquid-based microfluidic sensor using lithography.
- Optimization of microfluidic channels via topology method and finite element analysis.
- Encapsulation of the liquid metal within an Ecoflex microfluidic assembly.
Main Results:
- The developed sensor exhibits approximately linear behavior with a high gauge factor (GF).
- Achieved a maximum GF of 4.95 at 550% strain, demonstrating excellent stretchability.
- Successfully applied in detecting joint, finger, and wrist movements with excellent results.
Conclusions:
- The EGaln microfluidic sensor offers superior mechanical flexibility and conformability.
- This technology facilitates the development of advanced liquid-state electronic devices.
- Potential for realization of functional, highly deformable wearable sensors.
More Related Videos
11:04Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
13.4K
08:49Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors
Published on: December 21, 2019
10.1K
Related Concept Videos
01:28Structure-Activity Relationships and Drug Design
1.7K
Drug design is a dynamic field that involves discovering and developing new medications based on specific biological targets. This process heavily relies on structure-activity relationships (SAR) and quantitative structure-activity relationships (QSAR) to guide the design and optimization of efficient drugs.
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...
SAR studies the intricate relationship between a drug's chemical structure and biological activity. It focuses on understanding how modifications to a drug's structure can influence...
1.7K
02:37Metallic Solids
20.5K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
20.5K
02:51Metal-Ligand Bonds
24.1K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
24.1K
03:06Alkali Metals
24.3K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
Table 1: Properties of the alkali metals
24.3K
02:01Group Design
10.3K
The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between...
10.3K
02:32Bonding in Metals
52.2K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
52.2K