Integration of Horizontal and Vertical Microfluidic Modules for Core-Shell Droplet Generation and Chemical Application

This paper presents a method for utilizing three-dimensional microfluidic channels fully to realize multiple functions in a single device. The final device structure was achieved by combining three independent modules that consisted of horizontal and vertical channels. The device allowed for the one-step generation of water-in-oil-in-water droplets without the need for partial treatment of the polydimethylsiloxane channel surface using separate modules for generating water-in-oil droplets on the horizontal plane and oil-in-water droplets on the vertical plane. The second vertically structured module provided an efficient flow for the generation of highly wettable liquid droplets, and tuning of the first horizontally structured module enabled different modes of inner-core encapsulation within the oil shell. The successful integration of the vertical and horizontal channels for core-shell droplet generation and the chemical synthesis of a metal complex within the droplets were evaluated. The proposed approach of integrating independent modules will expand and enhance the functions of microfluidic platforms.

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Optimization of Droplet Generation by Controlling PDMS Surface Hydrophobicity

Advances in Bioengineering ◽

10.1115/imece2004-61737 ◽

2004 ◽

Cited By ~ 1

Author(s):

Lung-Hsin Hung ◽

Abraham P. Lee

Keyword(s):

Hydrophobic Surface ◽

Surface Hydrophobicity ◽

Droplet Generation ◽

Hydrophilic Surface ◽

Water Droplets ◽

Pdms Surface ◽

Oil In Water

This paper presents an optimized method for droplet generation in PDMS microchannels. With controllable PDMS surface hydrophobicity and hydrophobicity recovery, alternative component droplets can be generated as anticipated. Different surface hydrophobicity results in different droplet generation patterns. Monodispersed water-in-oil and oil-in-water droplets are generated from hydrophilic and hydrophobic surface respectively. Nearly hydrophilic surface (30°<θ<50°) results in long-tailed droplets and less hydrophilic surface (70°<θ<80°) results in stream mixing. Discussion of methods to loss and recovery hydrophobicity of PDMS also included.

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Simple, green, ultrasound-assisted preparation of novel core–shell microcapsules from octyl methoxycinnamate and oligomeric proanthocyanidins for UV-stable sunscreen

RSC Advances ◽

10.1039/d0ra09116b ◽

2021 ◽

Vol 11 (11) ◽

pp. 6374-6382

Author(s):

Jie Song ◽

Siqi Chen ◽

Xu Zhao ◽

Junbo Cheng ◽

Yanli Ma ◽

...

Keyword(s):

Inner Core ◽

Outer Shell ◽

Core Shell ◽

Uv Resistance ◽

Oligomeric Proanthocyanidins ◽

Ultraviolet Absorbers ◽

Ultrasound Assisted

With oligomeric proanthocyanidins (OPCs) as the outer shell and ultraviolet absorbers (OMC) as the inner core, OMC/OPCs composite microcapsules were prepared and characterized, and their UV resistance was studied.

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Three-dimensional core-shell heterostructure of tungsten trioxide/bismuth molybdate/cobalt phosphate for enhanced photoelectrochemical water splitting

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2021.03.105 ◽

2021 ◽

Author(s):

Mostafa Saad Sayed ◽

Debananda Mohapatra ◽

Marjorie Lara Baynosa ◽

Jae-Jin Shim

Keyword(s):

Water Splitting ◽

Tungsten Trioxide ◽

Three Dimensional ◽

Photoelectrochemical Water Splitting ◽

Core Shell ◽

Bismuth Molybdate ◽

Cobalt Phosphate

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Rational design of three-dimensional branched NiCo-P@CoNiMo-P core/shell nanowire heterostructures for high-performance hybrid supercapacitor

Journal of Energy Chemistry ◽

10.1016/j.jechem.2021.02.005 ◽

2021 ◽

Author(s):

Yijing Huang ◽

Chong Luo ◽

Qiaobao Zhang ◽

Hehe Zhang ◽

Ming-Sheng Wang

Keyword(s):

High Performance ◽

Rational Design ◽

Three Dimensional ◽

Core Shell ◽

Hybrid Supercapacitor ◽

Nanowire Heterostructures

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Investigating spin coupling across a three-dimensional interface in core/shell magnetic nanoparticles

Physical Review Materials ◽

10.1103/physrevmaterials.4.034408 ◽

2020 ◽

Vol 4 (3) ◽

Cited By ~ 2

Author(s):

C. Kons ◽

Manh-Huong Phan ◽

Hariharan Srikanth ◽

D. A. Arena ◽

Zohreh Nemati ◽

...

Keyword(s):

Magnetic Nanoparticles ◽

Three Dimensional ◽

Spin Coupling ◽

Core Shell

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Experimental and simulation study of impurity transport response to RMPs in RF-heated H-mode plasmas at EAST

Journal of Plasma Physics ◽

10.1017/s0022377821000222 ◽

2021 ◽

Vol 87 (2) ◽

Author(s):

Germán Vogel ◽

Hongming Zhang ◽

Yongcai Shen ◽

Shuyu Dai ◽

Youwen Sun ◽

...

Keyword(s):

Inner Core ◽

Extreme Ultraviolet ◽

Transport Coefficients ◽

Three Dimensional ◽

Line Emission ◽

Core Region ◽

Emission Mitigation ◽

One Dimensional ◽

Impurity Transport ◽

Transport Code

Spatial profiles of impurity emission measurements in the extreme ultraviolet (EUV) spectroscopic range in radiofrequency (RF)-heated discharges are combined with one-dimensional and three-dimensional transport simulations to study the effects of resonant magnetic perturbations (RMPs) on core impurity accumulation at EAST. The amount of impurity line emission mitigation by RMPs appears to be correlated with the ion Z for lithium, carbon, iron and tungsten monitored, i.e. stronger suppression of accumulation for heavier ions. The targeted effect on the most detrimental high-Z impurities suggests a possible advantage using RMPs for impurity control. Profiles of transport coefficients are calculated with the STRAHL one-dimensional impurity transport code, keeping $\nu /D$ fixed and using the measured spatial profiles of $\textrm{F}{\textrm{e}^{20 + }}$ , $\textrm{F}{\textrm{e}^{21 + }}$ and $\textrm{F}{\textrm{e}^{22 + }}$ to disentangle the transport coefficients. The iron diffusion coefficient ${D_{\textrm{Fe}}}$ increases from $1.0- 2.0\;{\textrm{m}^2}\;{\textrm{s}^{ - 1}}$ to $1.5- 3.0\;{\textrm{m}^2}\;{\textrm{s}^{ - 1}}$ from the core region to the edge region $(\rho \gt 0.5)$ after the onset of RMPs. Meanwhile, an inward pinch of iron convective velocity ${\nu _{\textrm{Fe}}}$ decreases in magnitude in the inner core region and increases significantly in the outer confined region, simultaneously contributing to preserving centrally peaked $\textrm{Fe}$ profiles and exhausting the impurities. The ${D_{\textrm{Fe}}}$ and ${\nu _{\textrm{Fe}}}$ variations lead to reduced impurity contents in the plasma. The three-dimensional edge impurity transport code EMC3-EIRENE was also applied for a case of RMP-mitigated high-Z accumulation at EAST and compared to that of low-Z carbon. The exhaust of ${\textrm{C}^{6 + }}$ toward the scrape-off layer accompanying an overall suppression of heavier ${\textrm{W}^{30 + }}$ is observed when using RMPs.

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