Magnetically steerable iron oxides-manganese dioxide core–shell micromotors for organic and microplastic removals

Ye, Heng; Wang, Yong; Liu, Xiaojia; Xu, Dandan; Yuan, Hao; Sun, Hongqi; Wang, Shaobin; Ma, Xing

doi:10.1016/j.jcis.2020.12.097

Cited by 107 publications

(58 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[17,20,33,44,45] Under different types of vector fields established by corresponding signal sources, micro/nanomotors are propelled by the aligning or direct torque. On this basis, diverse fabrication methods have been developed to build micro/ nanomotors with asymmetric structures, such as porous template-assisted synthesis, [17] hydrothermal formation, [46,47] chemical coprecipitation, [48] and microfluidic production, [49,50] which are summarized in Table 1. Among them, the electrochemical deposition method receives mainstream interest in the synthesis of Mn-micro/nanomotors using template-based and template-less approaches, owing to the facile design strategy, flexible modification, as well as simple operation.…”

Section: Synthesis Of Mn-based Materialsmentioning

confidence: 99%

Manganese‐Based Micro/Nanomotors: Synthesis, Motion, and Applications

Yang

Zhang

et al. 2021

Small

Self Cite

View full text Add to dashboard Cite

As emerging micro/nano‐scale devices, micro/nanomotors have been innovatively applied in the environmental and biomedical applications. In this paper, the recent advances of Mn‐based micro/nanomotors (Mn‐micro/nanomotors) in catalytic oxidation of organic contaminants and the mechanisms in decomposition of H2O2 (e.g., the generation of O2 bubbles and reactive oxygen species) are reviewed. The intrinsic characteristics and synthetic strategies of Mn‐based materials are discussed, aiming to gain comprehensive understandings on the asymmetric design of micro/nanomotors. Mn‐micro/nanomotors have many advantages such as flexible structures, biocompatibility, powerful motion, long lifetime, and low‐cost as compared to noble‐metal micro/nanomotors. These merits fulfil Mn‐micro/nanomotors great promises from proof‐of‐concept studies to realistic applications, including pollutant decomposition, trace detection of heavy metal ions, oil removal, drug delivery, isolation of biological targets, and killing bacteria and cancer cells. The great flexibility in fabrication enables diverse and innovative strategies to address challenges for Mn‐micro/nanomotors, including high consumption of H2O2 and non‐directional motion. Meanwhile, a perspective of Mn‐micro/nanomotors in water remediation by coupling the motors with other Fenton/Fenton‐like systems to enhance the catalytic activity and to yield more reactive oxygen species is presented. Directions to the design of on‐demand H2O2‐fueled Mn‐micro/nanomotors for advanced purification of organic contaminants in aquatic systems are also proposed.

show abstract

Section: Synthesis Of Mn-based Materialsmentioning

confidence: 99%

Manganese‐Based Micro/Nanomotors: Synthesis, Motion, and Applications

Yang

Zhang

et al. 2021

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…The dynamic relocation of microparticles was conducted by the vision feedback information and the computer would simultaneously decide whether the mission was completed or not. Even though this control interface is designed for the acoustic manipulation platforms, it expects to be expanded to other microrobotic manipulation platforms [50][51][52][53] to monitor the working states and manipulate diverse micro/ nano-robots powered by different stimulus. To be specified, the time consumption for each image processing is around 40 ms.…”

Section: Working Principle Of the Acousto-microrobotic Platformmentioning

confidence: 99%

An Acousto‐Microrobotic Interface with Vision‐Feedback Control

Wei

Shen

et al. 2021

Adv Materials Technologies

View full text Add to dashboard Cite

Precise manipulations for micro/nano targets of synthetic particles and bio‐cells hold great promise for the next generation of nano robotic systems and micro‐machines. Although considerable efforts have been devoted to developing propulsion protocols for micro/nano‐manipulation, the limited intelligence without effective control for current microrobots prohibits them away from most sophisticated applications. Here, a novel approach integrating the vision feedback control (VFC) is presented into a microrobotic platform powered by acoustic fields to accomplish autonomous targets identification and optimization of the locomotion resolution. Driven by local enhanced acoustic streaming, microparticles in the vicinity of the linear manipulator could be transported along the given pathway. Via vision feedback control, the targets of microparticles are automatically recognized in the acousto‐microrobotic interface and driven toward the exact user‐defined destinations. The VFC integrated interface is also adoptable to multiple particle manipulations, where each particle is distinguished with unique index numbers for a convenient on‐demand selection. At last, this closed‐loop interface is validated to control the motion of bio‐cells, illustrating the good robustness and biological compatibility. The VFC based control strategy for acousto‐microrobotic interface is featured with favorable controllability and thus will have great potentials in myriad scenarios for smart micro/nano systems.

show abstract

“…[ 26 ] Another removal mechanism was the adsorptive bubble separation induced by iron oxide‐manganese dioxide core–shell microrobots. [ 27 ] The oxygen bubbles generated during their movement trapped microplastics and suspended them in a foam layer on the top of the vessel, facilitating their collection. Despite promising, these approaches do not consider the elimination of removed microplastics.…”

Section: Introductionmentioning

confidence: 99%

Nano/Microplastics Capture and Degradation by Autonomous Nano/Microrobots: A Perspective

Urso

Pumera

2022

Adv Funct Materials

View full text Add to dashboard Cite

The growing use of plastic materials has led to the continuous accumulation of wastes in marine environments, which fragment into hazardous micro‐and nanoplastics. These plastic particles absorb toxic organic pollutants on their surface, support bacterial biofilms growth, and propagate through the food chain, posing serious risks for human health. Therefore, nano/microplastics pollution has become a global issue, making their definitive elimination compulsory. Self‐propelled nano/microrobots have demonstrated efficient removal of nano/microplastics from water, combining enhanced physicochemical properties of nano/microscale materials and active motion. During the last year, the potential of this technology to degrade nano/microplastics has been investigated. Here, the most advanced strategies for nano/microplastics capture and subsequent degradation by autonomous nano/microrobots are critically reviewed. A short introduction to the main propulsion mechanisms and experimental techniques for studying nano/microplastics degradation is also provided. Forthcoming challenges in this research field are discussed proactively. This perspective inspires future nano/microrobotic designs and approaches for water purification from nano/microplastics and other emerging pollutants.

show abstract

Magnetically steerable iron oxides-manganese dioxide core–shell micromotors for organic and microplastic removals

Cited by 107 publications

References 48 publications

Manganese‐Based Micro/Nanomotors: Synthesis, Motion, and Applications

Manganese‐Based Micro/Nanomotors: Synthesis, Motion, and Applications

An Acousto‐Microrobotic Interface with Vision‐Feedback Control

Nano/Microplastics Capture and Degradation by Autonomous Nano/Microrobots: A Perspective

Contact Info

Product

Resources

About