Optofluidic manipulation of <i>Escherichia coli</i> in a microfluidic channel using an abruptly tapered optical fiber

Xin, Hongbao; Li, Yayi; Li, Lingshan; Xu, Rui; Li, Baojun

doi:10.1063/1.4813905

Cited by 27 publications

(24 citation statements)

References 19 publications

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“…With this probe the trapping of yeast cells was achieved. After this work several others reported similar OFTs fabrication procedures [30], [31]. The main difference among the fiber probes reported rely on the final optical fiber taper profiles and their focusing capabilities.…”

Section: B Thermal Pullingmentioning

confidence: 92%

“…Exploring the effects of push, pulling and trapping at different distance of the focal point, the OFTs were used to perform trapping and arrangement (linear chains) of multiple particles [34]. Also, a sharper probe (380 nm diameter) was used in a microfluidic platform to study E-coli bacteria dynamics [30]. Rather than a standard taper a more abrupt profile yielding larger focusing distances and enabling truly contactless trapping of E-coli bacteria [31] was tested.…”

Section: B Thermal Pullingmentioning

confidence: 99%

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New Trends on Optical Fiber Tweezers

Ribeiro

Soppera

Oliva

et al. 2015

J. Lightwave Technol.

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In the last decades Optical Trapping has played an unique role concerning contactless trapping and manipulation of biological specimens. More recently, Optical Fiber Tweezers (OFTs) are emerging as a desirable alternative to bulk optical systems. In this work an overview of the state of the art of OFTs is presented, focusing on the main fabrication methods, their features and main achievements. In addition, new OFTs fabricated by guided wave photo polymerization are reported. Their theoretical and experimental characterization is given and results demonstrating its application in the manipulation of yeast cells and the organelles of plant cells are presented.

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Section: B Thermal Pullingmentioning

confidence: 92%

Section: B Thermal Pullingmentioning

confidence: 99%

New Trends on Optical Fiber Tweezers

Ribeiro

Soppera

Oliva

et al. 2015

J. Lightwave Technol.

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“…To the best of our knowledge, there was no report on optical tweezers with tunable manipulation length. Very recently the combination of microfluidics with fiber tip tweezers, named optofluidic manipulation by Li and his group members, further enhanced the power and flexibility of optical manipulation methods by introducing another important factor, i.e., the microfluidic flow rate [23].…”

Section: Introductionmentioning

confidence: 99%

Optofluidic tunable manipulation of microparticles by integrating graded-index fiber taper with a microcavity

Gong¹,

Zhang²,

Liu³

et al. 2015

Opt. Express

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We propose and demonstrate optofluidic tunable manipulation of polystyrene microparticles based on the combination of a graded-index fiber (GIF) taper and a microcavity. The tunability on the manipulation length is experimentally explored by changing the balance between the optical force and the microfluidic flow force, as well as by tuning the focus of light emitting from the GIF taper via adjusting the length of an air microcavity. By optimizing the geometric shape of the GIF taper, as well as the flow rate and laser power, a manipulation length of 177 μm is achieved, more than 4 times longer than the state-of-the-art optical fiber tweezers. This method has advantages of high flexibility, ease of fabrication and use, integration with microfluidics and has the potential for optofluidic sensing applications.

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“…In comparison with the orientation of nanoscale rod-shaped objects using COTs, in which different orientations of the objects can be achieved using differently polarized laser beams, this is a disadvantage of our method for the orientation of MWCNTs. Although we have used tapered optical fiber to manipulate various objects, 30,32,33 the objects that can be thus trapped and manipulated are limited to microscale/submicroscale dielectric particles (the smallest are 0.7-mm SiO 2 particles) and microscale/submicroscale biological cells (the smallest are Escherichia coli cells, with a diameter of approximately 700 nm and a length of approximately 2.0 mm). These objects can be easily observed using an optical microscope, and their Brownian motion is not significant because of their large sizes.…”

Section: ð2þmentioning

confidence: 99%

Optical orientation and shifting of a single multiwalled carbon nanotube

Xin

2014

Light Sci Appl

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The orientation and shifting of individual carbon nanotubes are extremely important in the assembly of building blocks of nanodevices and in the development of one-dimensional materials for interdisciplinary applications. Here, we report an optical method that is capable of producing the controlled orientation and targeted shifting of single multiwalled carbon nanotubes (MWCNTs) using an optical-fiber nanotip. In a demonstration of this technique, a single MWCNT with an outer diameter of 50 nm and a length of 0.9 mm was first trapped by the nanotip using a laser beam with a wavelength of 980 nm and was then oriented and shifted along the nanotip axis as a result of the interaction of the MWCNT with the optical field output by the nanotip. Various optical powers were applied to characterize the orientation and shifting performance. The orientation and shifting of MWCNTs of various sizes were also demonstrated.

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Optofluidic manipulation of Escherichia coli in a microfluidic channel using an abruptly tapered optical fiber

Cited by 27 publications

References 19 publications

New Trends on Optical Fiber Tweezers

New Trends on Optical Fiber Tweezers

Optofluidic tunable manipulation of microparticles by integrating graded-index fiber taper with a microcavity

Optical orientation and shifting of a single multiwalled carbon nanotube

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