Effects of contact angle hysteresis on drop manipulation using surface acoustic waves

Noori, Mahdi Sheikholeslam; Rahni, Mohammad Taeibi; Taleghani, Arash Shams

doi:10.1007/s00162-020-00516-0

Cited by 13 publications

(12 citation statements)

References 54 publications

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“…In summary therefore, a larger TSAW amplitude can be generated by using the Exciter-Exciter mode compared with the Exciter-Absorber mode with the same input voltage. Previous studies have shown that the droplet will move faster under driving with the TSAW with larger amplitude [23][24][25] . Thus, the upper limit of the droplet velocity can be significantly increased due to the increase of the amplitude of the TSAW by using the Exciter-Exciter mode.…”

Section: Velocity Adjustment Of the Actuated Droplets By Changing The...mentioning

confidence: 95%

“…It can be noted that in the mixed waves, formed from TSAWs and SSAWs, only the TSAWs can drive the droplets, while the SSAWs cannot [11] . Furthermore, previous studies have shown that the larger the amplitudes of the TSAWs, the faster will be the velocity of the actuated droplets [23][24][25] . Therefore, the larger the value of 1/SWR, the closer θ (in Fig.…”

Section: Velocity Adjustment Of the Actuated Droplets By Changing The...mentioning

confidence: 99%

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Velocity and Direction Adjustment of Actuated Droplets Using the Standing Wave Ratio of Surface Acoustic Waves (SAW)

Dong

Sui

et al. 2023

IEEE/ASME Trans. Mechatron.

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Droplet actuation using Surface Acoustic Wave (SAW) technology has recently been widely employed in 'lab on a chip' applications. In this paper, SAWs generated by Inter-Digital Transducers (IDTs) were used to actuate micro-droplets, where their velocity and direction could be adjusted by changing only the excitation phase shift, θ, of the voltage applied to the two IDTs. Specifically, an analytical expression for the acoustic Standing Wave Ratio (SWR), operating in the Exciter-Exciter mode, has been derived by the authors, and given as a function of θ and the spatial phase difference. It can be seen from the expression that the directions of the Traveling Surface Acoustic Waves (TSAWs) will be opposite to each other, in the range of θ given by (0, ) and (, 2), and the component of the TSAWs can be adjusted by changing θ in each direction. Following the theoretical analysis discussed here, the IDTs fabricated on a LiNbO3 substrate have been excited to generate a mixture of TSAWs and Standing Surface Acoustic Waves (SSAWs). A series of experiments was carried out to control the velocity and direction of the actuated droplets, by changing only θ. In addition, an experiment performed to compare the techniques shows that the upper limit of the velocity of the actuated droplets can be significantly increased using the Exciter-Exciter mode, showing that it has the potential to be an alternative method to the routine Exciter-Absorber mode.

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Section: Velocity Adjustment Of the Actuated Droplets By Changing The...mentioning

confidence: 95%

Section: Velocity Adjustment Of the Actuated Droplets By Changing The...mentioning

confidence: 99%

Velocity and Direction Adjustment of Actuated Droplets Using the Standing Wave Ratio of Surface Acoustic Waves (SAW)

Dong

Sui

et al. 2023

IEEE/ASME Trans. Mechatron.

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show abstract

“…Previous studies have shown that the larger the amplitude of TSAW, the faster the droplet will move. 47,58,59 However, there is no lateral (5)…”

Section: Velocity and Directional Adjustment Of The Actuated Droplets...mentioning

confidence: 99%

“…Previous studies have shown that the larger the amplitude of TSAW, the faster the droplet will move. 47,58,59 However, there is no lateral propagating wave component interacting with the droplet on the substrate when the pure SSAW is formed, illustrated by the simulation results shown in Fig. 4(b), and there is no total x -direction acoustic driving force.…”

Section: Underpinning Theoretical Backgroundmentioning

confidence: 99%

Droplet transportation by adjusting the temporal phase shift of surface acoustic waves in the exciter–exciter mode

Sui

Dong

et al. 2022

Lab Chip

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“…The longitudinal reinforcement adopts HRB335-grade steel, and stirrups adapt HPB235-grade steel. Figure 2 shows the sample after molding [4]. The main parameters of the experimental study are the axial compression ratio and the specific values of the steel plate hoop ratio, as shown in Table 1.…”

Section: Specimen Design and Productionmentioning

confidence: 99%

Composite mechanical performance of prefabricated concrete based on hysteresis curve equation

2021

Applied Mathematics and Nonlinear Sciences

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The angle steel-concrete column used in the new frame structure means that the rigid angle steel is placed in the column instead of the longitudinal reinforcement. The steel plate hoop welded to the longitudinal angle steel is used instead of the stirrup to form a spatial steel frame and concrete component. To ensure the normal use of existing houses in the building and adding floors, avoid transferring the load during the construction phase to the roof of the original house. The corresponding skeleton curve is extracted from the hysteresis curve of the specimen. Based on experimental research, the force performance of the normal section of the angle steel-concrete column was discussed, and the calculation formula of the normal section bearing capacity of the angle steel-concrete column was discussed.

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Effects of contact angle hysteresis on drop manipulation using surface acoustic waves

Cited by 13 publications

References 54 publications

Velocity and Direction Adjustment of Actuated Droplets Using the Standing Wave Ratio of Surface Acoustic Waves (SAW)

Velocity and Direction Adjustment of Actuated Droplets Using the Standing Wave Ratio of Surface Acoustic Waves (SAW)

Droplet transportation by adjusting the temporal phase shift of surface acoustic waves in the exciter–exciter mode

Composite mechanical performance of prefabricated concrete based on hysteresis curve equation

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