A love wave sensor for (bio)chemical sensing in liquids

Kovacs, Günter; Vellekoop, Michael J.; Haueis, R.; Lubking, G.W.; Venema, A.

doi:10.1016/0924-4247(93)00660-v

Cited by 130 publications

(71 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, devices with SSBW or leaky waves can be used for viscosity sensors [13,44]. The increase in the propagation loss PL and the decrease in the frequency f depend on the density q and viscosity g of a surrounding liquid [48]: …”

Section: Sensors Using Ssbw Sh-saw and Leaky Wavesmentioning

confidence: 99%

“…For large t/k, v approaches v f since more and more acoustic energy is concentrated within the film. Furthermore, it can be deduced that Love modes are dispersive, ie, the phase velocity depends on the frequency for a given t. Consequently, changes of device frequency Df/f (eg, in oscillator operation) are not equal to phase velocity changes Dv/v but are given by (v g /v) · (Dv/v), where v g denotes the group velocity; v g can be obtained from the phase velocity from [48] …”

Section: Love Wave Sensorsmentioning

confidence: 99%

See 1 more Smart Citation

Microacoustic Sensors for Liquid Monitoring

et al. 2001

View full text Add to dashboard Cite

In recent years, much effort has been expended to developing miniaturized, reliable sensors for measuring physical and chemical liquid properties. Microacoustic devices may be employed to determinate physical quantities perturbing the propagation conditions of the acoustic wave, even in liquid environments. For liquid sensors, acoustic modes with shear polarization are often used in order to avoid radiation losses. Examples are shear bulk modes, surface skimming bulk waves, shear-horizontal acoustic plate modes, and Love modes. Furthermore, modes with sagittal polarization may be applied if their phase velocity is sufficiently lower than the sound velocity in the adjacent liquid. General interactions between acoustic waves and liquids are viscous coupling, acoustoelectric effects, and mass loading. The resulting changes in device frequency and attenuation may be utilized for sensing purposes.The general advantages of microacoustic sensors are high sensitivity, simple fabrication, and quasidigital frequency readout. Hence, a wide variety of devices based on different modes for very different applications has been discussed in the relevant literature. The aim of this review is to provide a systematic overview of microacoustic sensors particularlay suited for operation in liquids.First, we provide a brief introductionto surfaceacousticwave devices and the underlying physics, basic microacoustic structures, and general measurement techniques. A description of the mechanisms of interaction between liquids and acoustic waves is then followed by a comprehensive survey covering the different types of microacoustic liquid sensors, with emphasis on the mode-specific device properties. Thereafter, aspects of material selection and device fabrication are summarized. Lastly, an overview is given indicating where microacoustic liquid sensors have already been put into practice and where their application may be expected in the near future.

show abstract

Section: Sensors Using Ssbw Sh-saw and Leaky Wavesmentioning

confidence: 99%

Section: Love Wave Sensorsmentioning

confidence: 99%

Microacoustic Sensors for Liquid Monitoring

et al. 2001

View full text Add to dashboard Cite

show abstract

“…Many acoustic wave devices show frequency and attenuation responses that are proportional to the square root of the product of fluid viscosity (rj) and density (p). Linear trends vs. (rjp) m have been demonstrated for TSM [85,86,115,164], SH-APM [54], FPW [65,71,73], and Love wave devices [165]. These measurements are best performed using a network analyzer to fully characterize the velocity and attenuation responses.…”

Section: Fluid Characterizationmentioning

confidence: 99%

Acoustic Wave Sensors

1996

View full text Add to dashboard Cite

“…al. in 1992. The use of sputtered SiO 2 as an alternative overlayer material was reported by Kovacs et al (1994) and this was extended to use chemical vapor deposition of the SiO 2 by Jakoby et al (1998); the use of multilayer Love-wave structures has also been reported Du 1997, Du andHarding 1998). The polymeric materials have lower shear wave velocity and lower density than the silicon dioxide, providing the potential for higher sensitivity, but devices incorporating polymers suffer from the disadvantage of having a higher acoustic loss.…”

Section: Introductionmentioning

confidence: 99%

Pulse mode shear horizontal-surface acoustic wave (SH-SAW) system for liquid based sensing applications

Martin

Newton

McHale

et al. 2004

Biosensors and Bioelectronics

View full text Add to dashboard Cite

In this work we describe a novel pulse mode shear horizontal surface acoustic wave (SH-SAW) polymer coated biosensor that monitors rapid changes in both amplitude and phase. The SH-SAW sensors were fabricated on 36 ο rotated Y-cut X propagating Lithium Tantalate (36 YX.LT). The sensitivity of the device to both mass loading and visco-elastic effects may be increased by using a thin guiding layer of cross-linked polymer. Two acoustic modes are excited by the electrodes in this crystalline direction. Metallisation of the propagation path of the 36 YX.LT devices allows the two modes to be discriminated. Successive polymer coatings resulted in the observation of resonant conditions in both modes as the layer thickness was increased.Using the 36 YX.LT devices, we have investigated the application of a novel pulse P r e -P r i n t mode system by sensing a sequence of deposition and removal of a biological layer consisting of vesicles of the phospholipid POPC. A continuous wave system was used to verify the accuracy of the pulse mode system by sensing a series of Poly(ethylene glycol) (PEG) solutions. The data clearly demonstrates the ability of the 36 YX.LT pulse mode system to provide rapid measurements of both amplitude and phase for biosensing applications.

show abstract

A love wave sensor for (bio)chemical sensing in liquids

Cited by 130 publications

References 13 publications

Microacoustic Sensors for Liquid Monitoring

Microacoustic Sensors for Liquid Monitoring

Acoustic Wave Sensors

Pulse mode shear horizontal-surface acoustic wave (SH-SAW) system for liquid based sensing applications

Contact Info

Product

Resources

About