Characterization of Nontoxic Liquid-Metal Alloy Galinstan for Applications in Microdevices

We have obtained interfacial properties of Galinstan, a nontoxic liquid-metal alloy, to help replace mercury in miniature devices. To prevent formation of an oxide skin that severely hinders the fluidic behavior of small Galinstan droplets and leads to inaccurate property data, we performed our expe...

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Published inJournal of microelectromechanical systems Vol. 21; no. 2; pp. 443 - 450
Main Authors Tingyi Liu, Sen, P., Chang-Jin Kim
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.04.2012
Institute of Electrical and Electronics Engineers
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Abstract We have obtained interfacial properties of Galinstan, a nontoxic liquid-metal alloy, to help replace mercury in miniature devices. To prevent formation of an oxide skin that severely hinders the fluidic behavior of small Galinstan droplets and leads to inaccurate property data, we performed our experiments in a nitrogen-filled glove box. It was found that only if never exposed to oxygen levels above 1 part per million (ppm) would Galinstan droplets behave like a liquid. Two key properties were then investigated: contact angles and surface tension. Advancing and receding contact angles of Galinstan were measured from sessile droplets on various materials: for example, 146.8 and 121.5, respectively, on glass. Surface tension was measured by the pendant-drop method to be 534.6 10.7 mN/m. All the measurements were done in nitrogen at 28 with oxygen and moisture levels below 0.5 ppm. To help design droplet-based microfluidic devices, we tested the response of Galinstan to electrowetting-on-dielectric actuation.
AbstractList We have obtained interfacial properties of Galinstan, a nontoxic liquid-metal alloy, to help replace mercury in miniature devices. To prevent formation of an oxide skin that severely hinders the fluidic behavior of small Galinstan droplets and leads to inaccurate property data, we performed our experiments in a nitrogen-filled glove box. It was found that only if never exposed to oxygen levels above 1 part per million (ppm) would Galinstan droplets behave like a liquid. Two key properties were then investigated: contact angles and surface tension. Advancing and receding contact angles of Galinstan were measured from sessile droplets on various materials: for example, 146.8 and 121.5, respectively, on glass. Surface tension was measured by the pendant-drop method to be 534.6 10.7 mN/m. All the measurements were done in nitrogen at 28 with oxygen and moisture levels below 0.5 ppm. To help design droplet-based microfluidic devices, we tested the response of Galinstan to electrowetting-on-dielectric actuation.
Author Tingyi Liu
Chang-Jin Kim
Sen, P.
Author_xml – sequence: 1
  surname: Tingyi Liu
  fullname: Tingyi Liu
  email: leolty@ucla.edu
  organization: Mech. & Aerosp. Eng. Dept., Univ. of California, Los Angeles, Los Angeles, CA, USA
– sequence: 2
  givenname: P.
  surname: Sen
  fullname: Sen, P.
  email: prosenjits@gmail.com
  organization: Mech. & Aerosp. Eng. Dept., Univ. of California, Los Angeles, Los Angeles, CA, USA
– sequence: 3
  surname: Chang-Jin Kim
  fullname: Chang-Jin Kim
  email: cjkim@seas.ucla.edu
  organization: Mech. & Aerosp. Eng. Dept., Univ. of California, Los Angeles, Los Angeles, CA, USA
BackLink http://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=25768124$$DView record in Pascal Francis
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Cites_doi 10.1109/MEMSYS.2010.5442440
10.1016/0029-5493(71)90015-X
10.1021/la00010a084
10.1109/ITCC.2002.1000371
10.1109/JMEMS.2008.2008624
10.1109/33.2973
10.1109/JMEMS.2007.893520
10.1016/0039-6028(66)90063-X
10.1021/j100903a002
10.1109/JMEMS.2008.2003055
10.1016/0029-554X(78)90961-8
10.1103/PhysRevE.74.026303
10.1109/JMEMS.2009.2029170
10.1016/S0924-4247(01)00734-8
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Issue 2
Keywords liquid-metal
Glass
Liquid metals
Contact angle
Experimental study
Wettability
Galinstan surface tension
Galinstan contact angle
Drops
Humidity
Electrowetting-on-dielectric (EWOD)
Droplets
Oxidation
Surface tension
Mechanical contacts
Galinstan
Mercury
Microelectromechanical device
Microfluidics
Fluidics
Galinstan oxidation
Language English
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PublicationTitle Journal of microelectromechanical systems
PublicationTitleAbbrev JMEMS
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Institute of Electrical and Electronics Engineers
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– ident: ref4
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– ident: ref23
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  publication-title: Electromechanical characteristics of liquid-metal Galinstan droplets
– ident: ref6
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– ident: ref7
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– ident: ref5
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– ident: ref12
  doi: 10.1103/PhysRevE.74.026303
– year: 2011
  ident: ref1
  publication-title: Galinstan Safety Data Sheet
– ident: ref9
  doi: 10.1109/JMEMS.2009.2029170
– ident: ref20
  doi: 10.1016/S0924-4247(01)00734-8
– year: 2007
  ident: ref11
  publication-title: Elektromagnetisches Absttzen von Flussigmetall-Tropfen
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Snippet We have obtained interfacial properties of Galinstan, a nontoxic liquid-metal alloy, to help replace mercury in miniature devices. To prevent formation of an...
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SubjectTerms Applied fluid mechanics
Condensed matter: structure, mechanical and thermal properties
Electrowetting-on-dielectric (EWOD)
Exact sciences and technology
Fluid dynamics
Fluid surfaces and fluid-fluid interfaces
Fluidics
Fundamental areas of phenomenology (including applications)
Galinstan
Galinstan contact angle
Galinstan oxidation
Galinstan surface tension
Glass
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
liquid-metal
Mechanical instruments, equipment and techniques
Metals
Micromechanical devices and systems
Oxidation
Physics
Rough surfaces
Solid-fluid interfaces
Surface energy (surface tension, interface tension, angle of contact, etc.)
Surface roughness
Surface tension
Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
Wetting
Title Characterization of Nontoxic Liquid-Metal Alloy Galinstan for Applications in Microdevices
URI https://ieeexplore.ieee.org/document/6097006
Volume 21
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