Liquid needle

Hongyu Yu; Qiang Zou; Jae Wan Kwon; Dai Huang; Eun Sok Kim

doi:10.1109/JMEMS.2006.887988

Liquid needle

Hongyu Yu, Qiang Zou, Jae Wan Kwon, Dai Huang, Eun Sok Kim

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

This paper describes a novel phenomenon "liquid needle" produced by the self-focusing acoustic transducer (SFAT). The SFAT is composed of a metal/piezo-material/metal plate (with and without a support layer) which has one side air backed while the other side is liquid backed. The SFAT generates and focuses acoustic waves (through wave interference) at the top surface of the liquid (with acoustic intensity up to 15W/cm². The focused acoustic beam deforms the free liquid surface through the acoustic streaming effect, and produces a needle-shaped liquid column on the free liquid surface. With various SFATs and different types of liquids, we have obtained liquid needles that are 400-12000 μm tall. The liquid needle diameter at its tip varies from less than 15μm to more than 200 μm.

Original language	English (US)
Pages (from-to)	445-453
Number of pages	9
Journal	Journal of Microelectromechanical Systems
Volume	16
Issue number	2
DOIs	https://doi.org/10.1109/JMEMS.2006.887988
State	Published - Apr 2007
Externally published	Yes

Keywords

Acoustic ejector
Acoustic streaming
Fresnel half-wave band (FHWB)
Self-focusing acoustic-wave transducer (SFAT)

ASJC Scopus subject areas

Mechanical Engineering
Electrical and Electronic Engineering

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10.1109/JMEMS.2006.887988

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@article{71a5300861fe4e90a5ab220e92ed061b,

title = "Liquid needle",

abstract = "This paper describes a novel phenomenon {"}liquid needle{"} produced by the self-focusing acoustic transducer (SFAT). The SFAT is composed of a metal/piezo-material/metal plate (with and without a support layer) which has one side air backed while the other side is liquid backed. The SFAT generates and focuses acoustic waves (through wave interference) at the top surface of the liquid (with acoustic intensity up to 15W/cm2. The focused acoustic beam deforms the free liquid surface through the acoustic streaming effect, and produces a needle-shaped liquid column on the free liquid surface. With various SFATs and different types of liquids, we have obtained liquid needles that are 400-12000 μm tall. The liquid needle diameter at its tip varies from less than 15μm to more than 200 μm.",

keywords = "Acoustic ejector, Acoustic streaming, Fresnel half-wave band (FHWB), Self-focusing acoustic-wave transducer (SFAT)",

author = "Hongyu Yu and Qiang Zou and Kwon, {Jae Wan} and Dai Huang and Kim, {Eun Sok}",

note = "Funding Information: Manuscript received September 9, 2004; revised April 28, 2006. This work was supported by the BioFlips Program of Defense Advanced Research Projects Agency under Contract #N66001-00-C-8094. Subject Editor T. W. Kenny.",

year = "2007",

month = apr,

doi = "10.1109/JMEMS.2006.887988",

language = "English (US)",

volume = "16",

pages = "445--453",

journal = "Journal of Microelectromechanical Systems",

issn = "1057-7157",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "2",

}

TY - JOUR

T1 - Liquid needle

AU - Yu, Hongyu

AU - Zou, Qiang

AU - Kwon, Jae Wan

AU - Huang, Dai

AU - Kim, Eun Sok

N1 - Funding Information: Manuscript received September 9, 2004; revised April 28, 2006. This work was supported by the BioFlips Program of Defense Advanced Research Projects Agency under Contract #N66001-00-C-8094. Subject Editor T. W. Kenny.

PY - 2007/4

Y1 - 2007/4

N2 - This paper describes a novel phenomenon "liquid needle" produced by the self-focusing acoustic transducer (SFAT). The SFAT is composed of a metal/piezo-material/metal plate (with and without a support layer) which has one side air backed while the other side is liquid backed. The SFAT generates and focuses acoustic waves (through wave interference) at the top surface of the liquid (with acoustic intensity up to 15W/cm2. The focused acoustic beam deforms the free liquid surface through the acoustic streaming effect, and produces a needle-shaped liquid column on the free liquid surface. With various SFATs and different types of liquids, we have obtained liquid needles that are 400-12000 μm tall. The liquid needle diameter at its tip varies from less than 15μm to more than 200 μm.

AB - This paper describes a novel phenomenon "liquid needle" produced by the self-focusing acoustic transducer (SFAT). The SFAT is composed of a metal/piezo-material/metal plate (with and without a support layer) which has one side air backed while the other side is liquid backed. The SFAT generates and focuses acoustic waves (through wave interference) at the top surface of the liquid (with acoustic intensity up to 15W/cm2. The focused acoustic beam deforms the free liquid surface through the acoustic streaming effect, and produces a needle-shaped liquid column on the free liquid surface. With various SFATs and different types of liquids, we have obtained liquid needles that are 400-12000 μm tall. The liquid needle diameter at its tip varies from less than 15μm to more than 200 μm.

KW - Acoustic ejector

KW - Acoustic streaming

KW - Fresnel half-wave band (FHWB)

KW - Self-focusing acoustic-wave transducer (SFAT)

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U2 - 10.1109/JMEMS.2006.887988

DO - 10.1109/JMEMS.2006.887988

M3 - Article

AN - SCOPUS:34147144641

SN - 1057-7157

VL - 16

SP - 445

EP - 453

JO - Journal of Microelectromechanical Systems

JF - Journal of Microelectromechanical Systems

IS - 2

ER -

Liquid needle

Abstract

Keywords

ASJC Scopus subject areas

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