Single-sided continuous optoelectrowetting (SCOEW) for droplet manipulation with light patterns
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V Srinivasan, VK Pamula, RB Fair - Lab on a chip, 2004 - ncbi.nlm.nih.gov
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V Srinivasan, VK Pamula, RB Fair - Lab on a chip, 2004 - ncbi.nlm.nih.gov
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Peter DelNero
ReplyDelete1) I learned about low-intensity light-directed SCOEW device for droplet manipulation on an open surface. I didn't know that EWOD-based devices had so much versatility for LOC applications- including PCR, diagnostics, on-chip cooling, and more.
2) Why is it more desireable to have an open-faced, featureless surface? Is this technology compatible with enclosed microfluidics? i.e.- can you put a lid on this? What does "stunt-equivalent circuit" mean?
3) Summary of EWOD applications, how do droplet-based technologies work?
4) Is there a way to use this technology as a pump, with the droplets creating pressure somewhere?
Jason Kappa
ReplyDeletePark
1. This paper discusses the development of a new optoelectrowetting system that can manipulate a droplet of fluid using light. This system is an improvement over earlier techniques due to its unique ability the move a particle in any direction on the 2D surface of the device using low intensity light while maintaining a consistent droplet size.
2. Not to repeat what Peter asked, but what did they mean by shunt-equivalent circuit and why is it an improvement over other more traditional circuit equivalents in optoelectrowetting systems? Also, how do they prevent droplet splitting when mixing two droplets on the surface of the device? Is it a function of the hydrophobicity of the surface?
3. An overview of the principles of optoelectrowetting. Also, discussion of the other systems that the paper mentions in the introduction.
1. SCOEW mechanism allows for manipulating droplets in order to transport them, split them, inject them, and mix them.
ReplyDelete2. In the light-triggered droplet splitting, the article mentions the phenomenon that droplets only split when the dark bar pattern is wide enough, but how exactly does the dark bar pattern cause the droplet to split in the first place?
3. Discuss the way SCOEW can be integrated with other microfluidic components that SyBBURE specifically uses.
Tang Dhummakupt
ReplyDeletePark
1. You can use an SCOEW device to manipulate water droplets in oil. By using specific light patterns under the droplets to change the contact angle, you to move, split or merge droplets.
2. How does the light affect the dielectric layer and electrodes to change the contact angle of the water.
3. The necessity for manipulating specific volumes in microfluidic devices
Erik Werner
ReplyDeletePark
1. SCOEW is a versatile tool for manipulating water droplets using only the SCOEW surface and a light source such as an LCD.
2. What other liquids is this tech compatible with? How well do water-based solutions of different concentrations perform? Non water-based? Samples are introduced to the system via injection, how can they be removed?
3. A summary of how EWOD is used in the applications mentioned at the beginning of the paper. Compare/contrast with similar technologies.
4. The LCD feature is impressive.
E Lillie
ReplyDeletePark
1. SCOEW is a technique that uses optical patterns instead of digital electrodes to transport, split, merge, and mix water droplets.
2. Would this technique work on liquids with different optical properties or net charge? What if the droplet included a cell, could SCOEW still work to move the media and cell around?
3. Uses of the SCOEW method in different liquids
Rosie Korman
ReplyDeletePark
1. Park et. al have developed a technique to manipulate droplets in oil on chip.
2. What is the size of the largest droplet that can be manipulated by using this technique?
Applications?
3. Integration of this technique with microfluidic devices.
This comment has been removed by the author.
ReplyDeleteLauren Kolski
ReplyDeletePark
1. Device that uses optical patterns to manipulate droplets in oil.
2. Can you explain the optics behind this device?
3. Please explain the physics/optics behind this for the non-engineers
James Irving
ReplyDeletePark
1.The paper described a new method for manipulating droplets of water in oil on the SCOEW device by the use of light patterns.
2.Does the maximum size of the droplets which the system is able to manipulate decrease significantly when low light intensity sources (e.g. LCDs) are used?
3. Applications in microfluidic devices.
Amy Ostrowski
ReplyDeletePark
1. An SCOEW mechanism has been developed which allows for water droplet manipulations such as injection, splitting, transportation, and merging.
2. Does this mechanism only work with water droplets?
3. One of the advantages over previous devices is the easy integration with other microfluidic devices, give some examples.
Kevin Qin
ReplyDeletePark
1. Single-sided continuous optoelectrowetting (SCOEW) mechanism that allows continuous transport, splitting, merging, and mixing of droplets on an open, photoconductive surface.
2. So are they using the optical projector to convert light to electricity? Can you explain the SCOEW schematic better?
3. More information on droplet merging/mixing and splitting.
Chaitanya Allamneni
ReplyDeletePark
1. A method was discussed to manipulate droplets in oil using light rather than the typical DEP/electrode method.
2. What are the restrictions on the composition of the liquid droplet that can be manipulated?
3. Effectiveness for cell trapping within microfluidic devices.
Jinnah
ReplyDeletePark
1. This SCOEW device allows for spatial manipulation of water-in-oil droplets in MF devices by changing light patterns.
2. Are you planning on applying this technology for your project?
3. You could briefly go over droplet formation and application in MF devices.
Kevin Roman
ReplyDeletePark
1. A SCOEW devices that uses changing light patterns to manipulate droplets in oil.
2.Would other liquids with different optics and net charge give the same result as with water?
3.More information on the dark bar pattern.
Will Matloff
ReplyDeletePark
1. A device was created that allows for the manipulation of droplets on an open surface using light.
2. How do the physical properties of the device materials combine together to create what can be understood as a shunt circuit? How to do the droplets leave the chip without removing the oil as well?
3. A presentation could be given on how the shunt circuit functions to produce relative voltage differences across an area and how the materials used accomplish the same thing. In addition, it would be useful to discuss the creation of good acronyms.
4. This device is very nice in that it is open-faced and steady-state. Cost of fabrication is low. Furthermore, there are fewer issues with impedance and laminarity in this type of device. It could be made into a nice continuous formulator.
Park
ReplyDelete1. A multi-layer device was created to modulate drops in two dimensions using light patterns.
2. Could you perform the same basic thing without the oil?
3. Droplet microfluidics would be a cool project/topic for someone...
Joe Scherrer
ReplyDeletePark
1. A device can be used to manipulate liquid droplets by changing the contact angle of the liquid to a surface. This is achieved by changing the potential across the droplet.
2. As others have asked, how much is the functionality of the device changes by substituting different liquids for water?
3. Applications for microfluidic devices. Will has mentioned the microformulator.
4. I want to build one.
Alex Garza
ReplyDeletePark
1. Device to manipulate droplets.
2. Do different liquid affect the functioning and success for the device?
3. droplet MF device
Erica Curtis
ReplyDeletePark
1. A device was developed that uses light to manipulate droplets in oil.
2. What other liquids can you manipulate?
3. Practical applications.
Ayeeshik Kole
ReplyDeletePark
1. SCOEW exploits the optical patterns through oil to perform several manipulations of water droplets.
2. Could we use this technology to work with biological components by suspending single cells in the droplets? Perhaps able to introduce two droplets with cells together for cell communication or mating?
3. Integration with microfluidic traps
Lei Qu
ReplyDeletePark
1. A new improvement with SCOEW technique that can use water liquid droplet and integrate with optical device to create precise pattern and manipulation of microfluidic device
2. A little bit confused about the schematic of the technique. Will changing liquid and absence of oil affect the function of this device?
3. Emphasize on the necessity of this technique and the schematic of this technique.
4. What are possible important application with this techniques?
Raheel Thobhani
ReplyDeletePark
1. SCOEW is a device that was developed to manipulate droplets in oil.
2. Does this only work with water droplets or other liquids as well?
3.Applications dealing with microfluidics.
Jake Brady
ReplyDeletePark
1.) SCOEW is a tool developed to move and manipulate droplets in oil using low intensity light.
2.) Would other liquids behave differently, and how does one remove samples from the oil?
3.) a simpler explanation of the overriding physics and optics used in the device.
Rachel Harvey
ReplyDeletePark
1. SCOEW is used to manipulate droplets in oil and is superior to other methods of droplet manipulation.
2. Would hydrophobicity significantly affect this method?
3. Optical droplet manipulation
Laura McBride
ReplyDelete1. Improvements in the SCOEW technique has led to the ability to manipulate droplets in oil using optical devices.
2. Can other liquids be manipulated? What technique is required to remove the samples from the oil?
3. Can you discuss the physics behind the device as well as a more detailed description of the SCOEW schematic?
Brian Akselrad
ReplyDeletePark
1. Single-sided continuous optoelectrowetting can be used to transport, merge, split, or mix water droplets using different light patterns.
2. What happens when other liquids are used instead of oil and water?
3. I would like to understand OEW better and learn how this can be used in our lab.
Samat Kabani
ReplyDeletePark
1. One can use SCOEW to manipulate droplets in oil.
2. Is there any way to decrease the hydrogen bonding between water molecules?
3. Water Refraction in Oil