Microfluidic Pumps with Laser Streaming from Tips of Optical Fibers and Sewing Needles

Tong, Tian; Yue, Shuai; Li, Runjia; Lin, Feng; Chen, Di; Xing, Xinxin; Chu, W. K.; Song, Gangbing; Liu, Dong; Wang, Zhiming; Bao, Jiming

doi:10.1002/adom.202201534

Cited by 4 publications

(3 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, SAW-based acoustic streaming typically requires a SAW transducer outside the microchannel, which drastically increases the device footprint. The same issue is found in other microfluidic devices with active acoustic or photoacoustic streaming produced by lasers or piezoelectric transducers [11,12].…”

Section: Introductionsupporting

confidence: 57%

Acoustic Streaming Efficiency in a Microfluidic Biosensor with an Integrated CMUT

et al. 2023

View full text Add to dashboard Cite

The effect of microchannel height on acoustic streaming velocity and capacitive micromachined ultrasound transducer (CMUT) cell damping was investigated. Microchannels with heights ranging from 0.15 to 1.75 mm were used in experiments, and computational microchannel models with heights varying from 10 to 1800 micrometers were simulated. Both simulated and measured data show local minima and maxima of acoustic streaming efficiency associated with the wavelength of the `bulk acoustic wave excited at 5 MHz frequency. Local minima occur at microchannel heights that are multiples of half the wavelength (150 μm), which are caused by destructive interference between excited and reflected acoustic waves. Therefore, microchannel heights that are not multiples of 150 μm are more favorable for higher acoustic streaming effectiveness since destructive interference decreases the acoustic streaming effectiveness by more than 4 times. On average, the experimental data show slightly higher velocities for smaller microchannels than the simulated data, but the overall observation of higher streaming velocities in larger microchannels is not altered. In additional simulation, at small microchannel heights (10–350 μm), local minima at microchannel heights that are multiples of 150 μm were observed, indicating the interference between excited and reflected waves and causing acoustic damping of comparatively compliant CMUT membranes. Increasing the microchannel height to over 100 μm tends to eliminate the acoustic damping effect as the local minima of the CMUT membrane swing amplitude approach the maximum value of 42 nm, which is the calculated amplitude of the freely swinging membrane under the described conditions. At optimum conditions, an acoustic streaming velocity of over 2 mm/s in a 1.8 mm-high microchannel was achieved.

show abstract

Section: Introductionsupporting

confidence: 57%

Acoustic Streaming Efficiency in a Microfluidic Biosensor with an Integrated CMUT

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The transformation of light energy into mechanical energy for propulsion is the fundamental idea behind light-driven systems. Light is non-contact, dynamically reconfigurable, and easily focused onto minuscule measuring sites [ 193 , 194 ]. Some studies have utilized the photoresponsiveness of material surface microstructures or bulk structures deformation to manipulate fluids.…”

Section: Biosensing Via Closed Microfluidicsmentioning

confidence: 99%

Open and closed microfluidics for biosensing

Ge,

Hu,

Zhang

et al. 2024

Materials Today Bio

View full text Add to dashboard Cite

“…[21] Meanwhile, at the fluid level, thermal gradients facilitate particle motion over short distances via thermal permeation flows and extend that influence over longer distances through convection or thermally induced viscous flow. [22][23][24] An example of this phenomenon is when a laser is directed onto a substrate coated with AuNRs to create localized thermal changes, which in turn lead to larger-scale alterations in particle and fluid mechanics, facilitating transport over extended distances. [25] One of the most effective strategies in optofluidic involves utilizing photothermal effects, where localized heating induces convection for manipulating fluids and objects within them.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Microfluidic Chip Functionality via Thermal Gradient‐Driven Optofluidic Manipulation

Dai,

Xia,

Ding

et al. 2024

Adv Materials Technologies

View full text Add to dashboard Cite

Thermal gradient‐driven fluid motion, also known as thermal convection, is a common and significant phenomenon in nature. The utilization of localized thermal gradients to induce convection has emerged as a competitive approach in microfluidic chips. This technique enables the long‐distance transportation of substances under the influence of low‐power lasers. In this paper, an innovative optofluidic micro‐platform is presented that possesses a simple structure, easy operation, and excellent expandability. A UV nanosecond laser is utilized to create a high photothermal conversion region (HPCR) within the carbon nanotube‐doped PDMS substrate. Subsequently, the HPCR is subjected to irradiation for generating localized thermal gradients in the microfluidic chip. This resulted in Rayleigh–Bernard convection formation and facilitated long‐range transport and control of fluids and particles. Under low‐power laser irradiation, particles can be transported at speeds up to 0.18 mm s−1. In addition, the optofluidic platform shows significant potential for a range of functionalities, including fluid mixing and material sorting. The methodology described here allows for the rapid integration of new functionalities into existing chips while maintaining cost effectiveness and efficiency. This technique holds great promise for expanding the use of microfluidic devices in diverse fields, including chemistry, health sciences, materials science, and biomedicine.

show abstract

Microfluidic Pumps with Laser Streaming from Tips of Optical Fibers and Sewing Needles

Abstract: The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adom.202201534.

Cited by 4 publications

References 42 publications

Acoustic Streaming Efficiency in a Microfluidic Biosensor with an Integrated CMUT

Acoustic Streaming Efficiency in a Microfluidic Biosensor with an Integrated CMUT

Open and closed microfluidics for biosensing

Enhancing Microfluidic Chip Functionality via Thermal Gradient‐Driven Optofluidic Manipulation

Contact Info

Product

Resources

About