Rapid drop-to-drop liquid–liquid microextraction by help of surface acoustic wave

Zhang, An-Liang; Zha, Yan

doi:10.1016/j.cep.2012.07.014

Cited by 8 publications

(2 citation statements)

References 18 publications

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“…14 In microelectromechanical systems, surface acoustic wave motors 15 and electrostatic comb-drive actuators are reported. 16 In chemical engineering at small scale such as lab-on-a-chip technologies, various unit operations are performed using surface acoustic waves generated by interdigital transducers, which include mixing, 17 extraction, 18 heating 19 and manipulation of droplets. 20 As other examples of applications, IDA electrodes are employed for ordering small objects such as cells, 21 polymer particles, 22 metallic nanowires 23 and carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous formation of interdigitated array pattern in wrinkled gold films deposited on poly(dimethylsiloxane) elastomer

Watanabe

Hatano

Koizumi

2015

Polym J

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In this study, we attempted to produce a gold coating on a glass slide with an interdigitated array (IDA) pattern through a series of processes including spontaneous pattern formation as a key step instead of using photolithographic micromachining processes. In the first step, a gold film was formed by sputter deposition onto a strip of poly(dimethylsiloxane) (PDMS) elastomer. As part of the deposition process, the strip was heated because of the excess kinetic energy of the sputtered atoms. As the strip cooled to room temperature after the deposition, it thermally shrunk, causing the gold film to wrinkle because of buckling instability. Most of the wrinkles were oriented in a direction perpendicular to the lengthwise direction of the strip. In the second step, a glass strip that was narrower than the PDMS strip was placed on the PDMS strip. Sputter deposition of gold was repeated, resulting in the formation of wrinkles with an IDA pattern. Finally, this pattern was replicated on an elastomeric stamp surface that was then used for patterning a gold coating on a glass slide using microcontact printing techniques.

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Section: Introductionmentioning

confidence: 99%

Spontaneous formation of interdigitated array pattern in wrinkled gold films deposited on poly(dimethylsiloxane) elastomer

Watanabe

Hatano

Koizumi

2015

Polym J

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“…It was used not only for microfluidic manipulation such as, droplet transport , particle preconcentration and focusing , microfluidic mixing in microfluidic channel , or in paper‐based microfluidic systems , but also for liquid–liquid extraction . Zhang also reported SAW‐based droplet‐to‐droplet liquid–liquid microextraction. Droplets to be extracted were pipetted on a piezoelectric substrate, and radiated by SAW.…”

Section: Introductionmentioning

confidence: 99%

Single‐drop liquid phase microextraction accelerated by surface acoustic wave

Zhang

Zhou

2013

J of Separation Science

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A single-drop liquid phase microextraction method is presented, in which surface acoustic wave (SAW) is used for accelerating extraction speed. A pair of interdigital transducers with 27.5 MHz center frequency is fabricated on a 128° yx-LiNbO3 substrate. A radio frequency signal is applied to one of interdigital transducers to excite SAW. Plastic straw is filled with PDMS, leaving 1 mL for holding sample solution. Plastic straw with sample solution droplet is then dipping into extractant, into which SAW is radiated. Mass transportation from sample solution to extractant drop is accelerated due to acoustic streaming, and extraction time is decreased. An ionic liquid and an acid green-25 solution are used for extraction experiments. Results show that the extraction process is almost finished within 2 min, and extraction speed is increased with radio frequency signal power.

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The selection and mechanism of composite solvent containing ionic liquid in liquid-liquid microextraction process

Fang

et al. 2019

Chemical Engineering and Processing - Process Intensification

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Rapid drop-to-drop liquid–liquid microextraction by help of surface acoustic wave

Cited by 8 publications

References 18 publications

Spontaneous formation of interdigitated array pattern in wrinkled gold films deposited on poly(dimethylsiloxane) elastomer

Spontaneous formation of interdigitated array pattern in wrinkled gold films deposited on poly(dimethylsiloxane) elastomer

Single‐drop liquid phase microextraction accelerated by surface acoustic wave

The selection and mechanism of composite solvent containing ionic liquid in liquid-liquid microextraction process

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