Droplet microfluidics generates and manipulates discrete droplets through immiscible multiphase flows inside microchannels Due to its remarkable advantages, droplet microfluidics bears significant value in an extremely wide range of area In this review, we provide a comprehensive and in-depth insight into droplet microfluidics, covering fundamental research from microfluidic chip fabrication and droplet generation to the applications of droplets in bio(chemical) analysis and materials generation The purpose of this review is to convey the fundamentals of droplet microfluidics, a critical analysis on its current status and challenges, and opinions on its future development We believe this review will promote communications among biology, chemistry, physics, and materials science

Emerging Droplet Microfluidics

Magnetic nanocomposites with well-defined mesoporous structures, shapes, and tailored properties are of immense scientific and technological interest. This review article is devoted to the progress in the synthesis and applications of magnetic mesoporous materials. The first part briefly reviews various general methods developed for producing magnetic nanoparticles (NPs). The second presents and categorizes the synthesis of magnetic nanocomposites with mesoporous structures. These nanocomposites are broadly categorized into four types: monodisperse magnetic nanocrystals embedded in mesoporous nanospheres, microspheres encapsulating magnetic cores into perpendicularly aligned mesoporous shells, ordered mesoporous materials loaded with magnetic NPs inside the porous channels or cages, and rattle-type magnetic nanocomposites. The third section reviews the potential applications of the magnetic nanocomposites with mesoporous structures in the areas of heath care, catalysis, and environmental separation. The final section offers a summary and future perspectives on the state-of-the art in this area.

Magnetic nanocomposites with mesoporous structures: synthesis and applications.

Superparamagnetic iron oxide nanoparticles have received great attention due to their applications as contrast agents for magnetic resonance imaging (MRI). This feature article briefly introduces the concepts of MRI and MRI contrast agents, and then mainly discusses the synthesis, surface modification, surface functionalization, colloidal stability and biocompatibility of iron oxide particles, followed by their MRI applications.

Superparamagnetic iron oxide nanoparticles: from preparations to in vivo MRI applications

Stimuli-responsive capsules are of interest in drug delivery, fragrance release, food preservation, and self-healing materials. Many methods are used to trigger the release of encapsulated contents. Here we highlight mechanisms for the controlled release of encapsulated cargo that utilize chemical reactions occurring in solid polymeric shell walls. Triggering mechanisms responsible for covalent bond cleavage that result in the release of capsule contents include chemical, biological, light, thermal, magnetic, and electrical stimuli. We present methods for encapsulation and release, triggering methods, and mechanisms and conclude with our opinions on interesting obstacles for chemically induced activation with relevance for controlled release.

/pdf/triggered-release-from-polymer-capsules-3iipnngeta.pdf

Triggered Release from Polymer Capsules

OBJECTIVE. The purpose of this review is to describe the principles of MRI cell tracking with superparamagnetic iron oxides and the four clinical trials that have been performed.CONCLUSION. Clinical MRI cell tracking is likely to become an important tool at the bedside once (stem) cell therapy becomes mainstream. The most prominent role of this technique probably will be verification of accurate cell delivery with MRI-guided injection, in which interventional radiologists will play a role in the near future. All clinical studies described as of this writing have been performed outside the United States.

https://www.ajronline.org/doi/pdfplus/10.2214/AJR.09.3107

In Vivo MRI Cell Tracking: Clinical Studies

Amphiphilic Janus particles are successfully obtained via a powerful strategy combining diffusion-induced phase separation and magnetically driven dewetting. A large-area, amphiphilic monolayer is been formed via a self-assembly paradigm based on a synergy between the amphiphilicity, shape anisotropy, and external magnetic field. This functionality holds great promise for practical applications in intelligent coatings, anti-bioadhesion, and antifouling surfaces.

Amphiphilic Janus Particles Generated via a Combination of Diffusion‐Induced Phase Separation and Magnetically Driven Dewetting and Their Synergistic Self‐Assembly

Nanosheets-assembled hierarchical microstructured Ni(OH)2 hollow spheres for highly sensitive enzyme-free glucose sensors

Force‐Induced Remnant Magnetization Spectroscopy for Specific Magnetic Imaging of Molecules

Rate constant of the gas phase reaction of dimethyl sulfide (CH3SCH3) with ozone

Magnetic nanoparticles have emerged as a powerful tool for magnetic resonance imaging, biodetection, drug delivery, and hyperthermia. This review focuses on the biological detection of magnetic nanoparticles as well as their physicochemical properties. Substantial progress in the sensitivity of detection has been made by developing variety of methods. Five applications of magnetic nanoparticles in biological detection are discussed in this review: magnetic separation, magnetic sensing, magnetic manipulation, magnetic catalysis, and signal enhancer for surface plasmon resonance (SPR). Finally, some future trends and perspectives in these research areas are outlined.

/pdf/recent-advances-in-biological-detection-with-magnetic-4f868x48ui.pdf

Li Yao

Papers

Amphiphilic Janus Particles Generated via a Combination of Diffusion‐Induced Phase Separation and Magnetically Driven Dewetting and Their Synergistic Self‐Assembly

Nanosheets-assembled hierarchical microstructured Ni(OH)2 hollow spheres for highly sensitive enzyme-free glucose sensors

Force‐Induced Remnant Magnetization Spectroscopy for Specific Magnetic Imaging of Molecules

Rate constant of the gas phase reaction of dimethyl sulfide (CH3SCH3) with ozone

Recent advances in biological detection with magnetic nanoparticles as a useful tool