scholarly journals Facile hydrodynamic cavitation ON CHIP via cellulose nanofibers stabilized perfluorodroplets inside layer-by-layer assembled SLIPS surfaces

2020 ◽  
Vol 382 ◽  
pp. 122809 ◽  
Author(s):  
Morteza Ghorbani ◽  
Araz Sheibani Aghdam ◽  
Moein Talebian Gevari ◽  
Ali Koşar ◽  
Fevzi Çakmak Cebeci ◽  
...  
Keyword(s):  
Cellulose Nanofibers ◽  
Hydrodynamic Cavitation ◽  
Layer By Layer ◽  
On Chip ◽  
Inside Layer

All-nanoparticle layer-by-layer coatings for Mid-IR on-chip gas sensing

2020 ◽  
Vol 56 (91) ◽  
pp. 14283-14286
Author(s):  
Diana Al Husseini ◽  
Junchao Zhou ◽  
Daniel Willhelm ◽  
Trevor Hastings ◽  
Gregory S. Day ◽  
...  
Keyword(s):  
Optical Waveguides ◽  
Gas Sensing ◽  
Layer By Layer ◽  
Precise Control ◽  
Nanoparticle Layer ◽  
Withdrawal Speed ◽  
Layer Deposition ◽  
Nanoparticle Coatings ◽  
On Chip

Functionalization of optical waveguides with submicron all-nanoparticle coatings significantly enhanced the detection of acetone. Such coatings were enabled via precise control of the substrate withdrawal speed using the layer-by-layer deposition.

scholarly journals Engineered Lateral Roughness Element Implementation and Working Fluid Alteration to Intensify Hydrodynamic Cavitating Flows on a Chip for Energy Harvesting

Micromachines ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 49 ◽  
Author(s):  
Moein Talebian Gevari ◽  
Ali Hosseinpour Shafaghi ◽  
Luis Guillermo Villanueva ◽  
Morteza Ghorbani ◽  
Ali Koşar
Keyword(s):  
Energy Harvesting ◽  
Microfluidic Devices ◽  
Surface Cleaning ◽  
Hydrodynamic Cavitation ◽  
Working Fluid ◽  
Wall Roughness ◽  
Cavitating Flows ◽  
Roughness Elements ◽  
Fluid Alteration ◽  
On Chip

Hydrodynamic cavitation is considered an effective tool to be used in different applications, such as surface cleaning, ones in the food industry, energy harvesting, water treatment, biomedical applications, and heat transfer enhancement. Thus, both characterization and intensification of cavitation phenomenon are of great importance. This study involves design and optimization of cavitation on chip devices by utilizing wall roughness elements and working fluid alteration. Seven different microfluidic devices were fabricated and tested. In order to harvest more energy from cavitating flows, different roughness elements were used to decrease the inlet pressure (input to the system), at which cavitation inception occurs. The implemented wall roughness elements were engineered structures in the shape of equilateral triangles embedded in the design of the microfluidic devices. The cavitation phenomena were also studied using ethanol as the working fluid, so that the fluid behavior differences in the tested cavitation on chip devices were explained and compared. The employment of the wall roughness elements was an effective approach to optimize the performances of the devices. The experimental results exhibited entirely different flow patterns for ethanol compared to water, which suggests the dominant effect of the surface tension on hydrodynamic cavitation in microfluidic channels.

Dielectrophoretic medium exchange around droplets for on-chip fabrication of Layer-by-Layer microcapsules

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Haizhen Sun ◽  
Yukun Ren ◽  
Tianyi Jiang ◽  
Ye Tao ◽  
Hongyuan Jiang
Keyword(s):  
Biomedical Engineering ◽  
Continuous Medium ◽  
Materials Science ◽  
Layer By Layer ◽  
Medium Exchange ◽  
Chip Fabrication ◽  
Coating Layers ◽  
On Chip

Continuous medium exchange within a microchannel represents a highly sought-after technique in functionalizing micro-objects with coating layers, enabling a myriad of applications ranging from biomedical engineering to materials science. Herein,...

scholarly journals Influence of Fluid Properties on Intensity of Hydrodynamic Cavitation and Deactivation of Salmonella typhimurium

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 326 ◽  
Author(s):  
Moein Talebian Gevari ◽  
Ayhan Parlar ◽  
Milad Torabfam ◽  
Ali Koşar ◽  
Meral Yüce ◽  
...  
Keyword(s):  
Salmonella Typhimurium ◽  
Flow Behavior ◽  
Agar Plate ◽  
Microfluidic Devices ◽  
Lower Surface ◽  
Hydrodynamic Cavitation ◽  
Cavitating Flows ◽  
Roughness Elements ◽  
On Chip ◽  
General Geometry

In this study, three microfluidic devices with different geometries are fabricated on silicon and are bonded to glass to withstand high-pressure fluid flows in order to observe bacteria deactivation effects of micro cavitating flows. The general geometry of the devices was a micro orifice with macroscopic wall roughness elements. The width of the microchannel and geometry of the roughness elements were varied in the devices. First, the thermophysical property effect (with deionized water and phosphate-buffered saline (PBS)) on flow behavior was revealed. The results showed a better performance of the device in terms of cavitation generation and intensity with PBS due to its higher density, higher saturation vapor pressure, and lower surface tension in comparison with water. Moreover, the second and third microfluidic devices were tested with water and Salmonella typhimurium bacteria suspension in PBS. Accordingly, the presence of the bacteria intensified cavitating flows. As a result, both devices performed better in terms of the intensity of cavitating flow with the presence of bacteria. Finally, the deactivation performance was assessed. A decrease in the bacteria colonies on the agar plate was detected upon the tenth cycle of cavitating flows, while a complete deactivation was achieved after the fifteenth cycle. Thus, the proposed devices can be considered as reliable hydrodynamic cavitation reactors for “water treatment on chip” applications.

Using cellulose nanofibers to reinforce polysaccharide films: Blending vs layer-by-layer casting

2020 ◽  
Vol 227 ◽  
pp. 115264 ◽  
Author(s):  
Kaixuan Zhao ◽  
Wenhang Wang ◽  
Anguo Teng ◽  
Kai Zhang ◽  
Yunhao Ma ◽  
...  
Keyword(s):  
Cellulose Nanofibers ◽  
Layer By Layer

scholarly journals Chondrocyte Behavior on Micropatterns Fabricated Using Layer-by-Layer Lift-Off: Morphological Analysis

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Jameel Shaik ◽  
Javeed Shaikh Mohammed ◽  
Michael J. McShane ◽  
David K. Mills
Keyword(s):  
Biomedical Applications ◽  
Cellular Response ◽  
Morphological Analysis ◽  
Layer By Layer ◽  
Lab On Chip ◽  
Cell Characterization ◽  
Characterization Studies ◽  
Lift Off ◽  
On Chip ◽  
Poly Styrene Sulfonate

Cell patterning has emerged as an elegant tool in developing cellular arrays, bioreactors, biosensors, and lab-on-chip devices and for use in engineering neotissue for repair or regeneration. In this study, micropatterned surfaces were created using the layer-by-layer lift-off (LbL-LO) method for analyzing canine chondrocytes response to patterned substrates. Five materials were chosen based on our previous studies. These included: poly(dimethyldiallylammonium chloride) (PDDA), poly(ethyleneimine) (PEI), poly(styrene sulfonate) (PSS), collagen, and chondroitin sulfate (CS). The substrates were patterned with these five different materials, in five and ten bilayers, resulting in the following multilayer nanofilm architectures: (PSS/PDDA)5, (PSS/PDDA)10; (CS/PEI)4/CS, (CS/PEI)9/CS; (PSS/PEI)5, (PSS/PEI)10; (PSS/Collagen)5, (PSS/Collagen)10; (PSS/PEI)4/PSS, (PSS/PEI)9/PSS. Cell characterization studies were used to assess the viability, longevity, and cellular response to the configured patterned multilayer architectures. The cumulative cell characterization data suggests that cell viability, longevity, and functionality were enhanced on micropatterned PEI, PSS, collagen, and CS multilayer nanofilms suggesting their possible use in biomedical applications.

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