Scopes and challenges of microfluidic technology for nanoparticle synthesis, photocatalysis and sensor applications: A comprehensive review

Saikia, Anindita; Newar, Rachita; S, Das; Singh, Aameek; Deuri, Deepak J.; Baruah, Arabinda

doi:10.1016/j.cherd.2023.03.049

Cited by 19 publications

(3 citation statements)

References 159 publications

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“…Conventional methods have long been employed for the synthesis of nanomaterials, relying on traditional bulkscale reactions in beakers or flasks. However, these conventional methods have certain disadvantages that can limit their effectiveness in nanomaterial synthesis, including high maintenance of equipments [1], prolonged reaction time [2], increased reagent consumption [3], difficulties in handling hazardous reactants [4], imprecise mixing control and limited integration with online monitoring and automation.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized droplets flow reactor for one-step highly controlled synthesis of SnO₂ quantum dots at room temperature

Katoch,

Shanmugam,

Rohal

et al. 2024

Eng. Res. Express

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In recent years, the conventional methods of synthesizing nanomaterials have been surpassed by the emergence of the microfluidics route, which has brought forth numerous advantages and transformed the domain of nanomaterial synthesis. However, the synthesis of semiconducting oxide nanomaterials, specifically Tin oxide (SnO2), remains a crucial area of research due to its remarkable advantages as a viable alternative to toxic and costly materials. Additionally, SnO2 quantum dots (QDs) exhibit immense potential across a diverse range of applications due to their exceptional optical and electrical properties. The existing synthesis methods for SnO2 QDs are either time-consuming or involve high-temperature conditions. To address these challenges, droplet-based microfluidic technique has emerged as a promising approach for the controlled synthesis of various semiconducting nanomaterials. This article highlights the synthesis of SnO2 QDs with tunable size through the utilization of a droplet-based microfluidic technique, providing precise control over droplet volumes. X-ray diffraction analysis verified the presence of rutile-type tetragonal structure in SnO2 QDs. From the transmission electron microscopy analysis, the average particle size was calculated to be 1.90 nm, 2.09 nm and 2.63 nm for the volume of droplet corresponding to 33.25 µl, 27.84 µl and 18.25 µl respectively. Furthermore, with a decrease in particle size a tunabilty in optical bandgap, from 4.60 eV to 4.00 eV was observed. This work provides insights into the influence of droplet volume on the particle size which in turn affects the associated properties of SnO2 QDs in a droplet-based microfluidic synthesis system.

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Section: Introductionmentioning

confidence: 99%

Miniaturized droplets flow reactor for one-step highly controlled synthesis of SnO₂ quantum dots at room temperature

Katoch,

Shanmugam,

Rohal

et al. 2024

Eng. Res. Express

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“…However, these methods are usually carried out in batch mode, and the reproducibility of the products is not guaranteed, owing to the poor mixing efficiency of batch reactors. Recently, microreactors with high-efficient mass/heat transfer are used for the continuous synthesis of nanoparticles. − Compared with conventional batch processes, the approach of using microreactors can synthesize nanoparticles with narrow particle size distribution (PSD) and high reproducibility due to the precise control of experimental variables (e.g., concentration and temperature) in the small dimensions of microreactors. , However, most of the studies were focused on ordered microreactors (i.e., lamination flow and segmented flow microreactors). For the lamination flow microreactors, the fluids usually flow side by side in a continuous mode, and mixing efficiency is relatively low due to the mass transfer being dominated by molecular diffusion .…”

Section: Introductionmentioning

confidence: 99%

Structure Screening of Oscillating Feedback Microreactors for the High-Throughput Synthesis of Zeolitic Imidazolate Framework-67 Nanoparticles with Controlled Size and Morphology

Chen,

Zhang,

Gao

et al. 2024

Ind. Eng. Chem. Res.

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The relationship between the flow pattern evolution and performance of oscillating feedback microreactors (OFMs) for the synthesis of ZIF-67 nanoparticles was investigated by a photomicrography technique. Accordingly, an oscillating feedback microreactor (OFM) with an optimized structure was identified for high-throughput ZIF-67 production. By varying the experimental conditions (i.e., flow rate, aging time, precursor concentration [Co 2+ ], solvent, and cobalt source), the average size of ZIF-67 products can be adjusted (from 16 to 294 nm) with narrow particle size distribution (geometric standard deviation: 1.08−1.14) as well as with controllable morphology (sphere or rhombic dodecahedron). The maximum total flow rate can reach 160 mL/min, indicating that a highthroughput synthesis of ZIF-67 is achieved. The screening method can be extended to optimize other microreactors, and the resulting OFMs can be applied to produce other kinds of nanoparticles.

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“…Micro uidics technology, which manipulates uids and various microspecies within micro-scaled channels [1,2], boasts numerous appealing characteristics such as minimal sample consumption, ease of integration, high sensitivity, rapid response time, and low cost [3]. These advantages make micro uidics highly suitable for a broad range of applications, including biomedicine [4], drug screening [5], environmental detection[6], chemical synthesis [7], food security[8], etc. The quality of micro uidic chip is crucial for ful lling the intended functionalities of these applications.…”

Section: Introductionmentioning

confidence: 99%

Dimension compensation of desktop LCD 3D printer for high-precision microfluidic applications

Zhang,

Liu,

Bao

et al. 2024

Preprint

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Recent advances in low-cost liquid crystal display (LCD) 3D printing have popularized its use in creating microfluidic master molds and complete devices. However, the quality and precision of these fabrications often fall short of the rigorous standards required for advanced microfluidic applications. This study introduces a novel approach to enhance the dimensional accuracy of microchannels produced using a desktop LCD 3D printer. We propose a method for dimension compensation, optimize the printing parameters, and provide a straightforward post-treatment technique to ensure high-quality curing of polydimethylsiloxane (PDMS) in master molds made from photosensitive resin. Our investigation assesses the precision of 3D printing across three different scales of square cross-section microchannels by measuring their widths and heights, leading to the determination of optimal layer thicknesses that minimize fabrication errors. The fabrication errors are further reduced by introducing a series of dimension compensation factors, which correct the nominal dimensions of the microchannels by using the compensation factors in 3D printing. The printing accuracy is significantly improved after compensation even in fabricating complex microchannels of triangular cross-sections. Finally, a spiral channel of trapezoidal-like cross-section with tilted edges is fabricated for microfluidic application, and highly efficient particle separation is realized in the channel. The proposed method provides new insights for utilizing desktop LCD 3D printers to achieve high-accuracy microstructures necessary for advanced microfluidic applications.

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Scopes and challenges of microfluidic technology for nanoparticle synthesis, photocatalysis and sensor applications: A comprehensive review

Cited by 19 publications

References 159 publications

Miniaturized droplets flow reactor for one-step highly controlled synthesis of SnO₂ quantum dots at room temperature

Miniaturized droplets flow reactor for one-step highly controlled synthesis of SnO₂ quantum dots at room temperature

Structure Screening of Oscillating Feedback Microreactors for the High-Throughput Synthesis of Zeolitic Imidazolate Framework-67 Nanoparticles with Controlled Size and Morphology

Dimension compensation of desktop LCD 3D printer for high-precision microfluidic applications

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Scopes and challenges of microfluidic technology for nanoparticle synthesis, photocatalysis and sensor applications: A comprehensive review

Cited by 19 publications

References 159 publications

Miniaturized droplets flow reactor for one-step highly controlled synthesis of SnO2 quantum dots at room temperature

Miniaturized droplets flow reactor for one-step highly controlled synthesis of SnO2 quantum dots at room temperature

Structure Screening of Oscillating Feedback Microreactors for the High-Throughput Synthesis of Zeolitic Imidazolate Framework-67 Nanoparticles with Controlled Size and Morphology

Dimension compensation of desktop LCD 3D printer for high-precision microfluidic applications

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Miniaturized droplets flow reactor for one-step highly controlled synthesis of SnO₂ quantum dots at room temperature

Miniaturized droplets flow reactor for one-step highly controlled synthesis of SnO₂ quantum dots at room temperature