Control of Particle Alignment in Water by an Alternating Electric Field

Abe, Masahiko; Yamamoto, Atsushi; Orita, Masanori; Ohkubo, Takahiro; Sakai, Hideki; Momozawa, Nobuyuki

doi:10.1021/la0490801

Cited by 30 publications

(18 citation statements)

References 23 publications

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“…The external electric field polarizes the dispersed particles, enhances their attraction and aggregation [7][8][9], increases migration of the particles and the surrounding ions [10] and may cause deformation of the fluid particles [11].…”

Section: Introductionmentioning

confidence: 99%

Behavior of yeast cells in aqueous suspension affected by pulsed electric field

Zakhem

Lanoisellé

Lebovka

et al. 2006

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Behavior of yeast cells in aqueous suspension affected by pulsed electric field

Zakhem

Lanoisellé

Lebovka

et al. 2006

Journal of Colloid and Interface Science

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“…The self‐organization of microparticles was one of the first collective behaviors observed in synthetic micromotors. As previously described in Section , the alignment of silica particles was demonstrated by applying an alternating electric field, leading to the self‐organization of a large group of them in stripes perpendicular to the applied field . Dynamic self‐assembly behavior was later reported for highly ordered ensemble of microparticles manipulated by magnetic fields .…”

Section: Collective and Cooperative Behavior Of Micro/nanoparticle Momentioning

confidence: 89%

“…Electric fields represent a well‐suited approach not only to induce micromotor motion but also to achieve a control over the particle position. For instance, the alignment of colloidal silica particles to an applied alternating electric field was shown . Microparticles of different diameters were positioned between two electrodes with a gap of 400 µm.…”

Section: Control Mechanismsmentioning

confidence: 99%

Self‐Propelled Micro/Nanoparticle Motors

Guix

Weiz

Schmidt

et al. 2018

Part & Part Syst Charact

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resulted in a forward motion. Here, the thermodynamic forces act over the inertial thrust. Variations of this motion principle have been reported over the last decade and they will be discussed accordingly in the following sections depending on the micromotor design and the energy source used for its propulsion (i.e., concentration gradient, electric fields, magnetic fields, thermal gradients). Additionally, different approaches to improve the performance in terms of velocity, control, lifetime, and functionality will be covered. However, there are certain constraints on the synthetic autonomous nano-and microparticle performance, such as poor interaction with the surrounding environment (i.e., biological entities) and lack of sensing capabilities, in addition to low lifespan or related toxicity issues. Therefore, biohybrid particulate micromotors appear as a promising solution to overcome such hurdles. They take advantage of the tailored and advanced functions of biological cells or microorganism, such as self-propulsion, sensing, and cargo capabilities, as well as their ability to interact with other cells. Together with the controllability of engineered microobjects, hybrid micro-and nanomotors represent a promising tool for diverse biomedical and environmental applications, where the main power source comes from their natural environment. [11] As shown in Figure 1, in this review we classify micro-and nanoparticle micromotors in two main categories: synthetic and biohybrids. The synthetic micromotors are then divided according to their propulsion mechanism, as follows: those propelled by a catalytic reaction, by optical stimuli, under magnetic fields, with ultrasound steering, electricity, and thermophoresis, respectively. Likewise, the biohybrids are classified as those propelled by bacteria and those employing enzymes as main energy source, respectively. Additionally, we point out the different methods that have been proposed during the last decade to guide the particles and the related collective behavior. We also discuss the potential applications and remaining challenges in the final section of the review. Synthetic Micro/Nanoparticle MotorsThe development of the first sphere-like synthetic micro-and nanomachines with their rotationally symmetric shape was particularly challenging. As per se, they contradict the first rule in the design of microscale devices aiming to perform an effective motility in response to specific energy input: they must present asymmetry. Such symmetry breaking can be associated with shape or the distribution of a certain reactive The growing interest in the design and fabrication of novel autonomous micro-and nanoparticles is motivated by the vast advances in their motion efficiency and their further implementation in both biomedical and environmental fields. The present review covers the motion principle and fabrication procedures of synthetic and hybrid particle-like micromotors reported to date to give a comprehensive view of the key design parameters and different approaches...

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“…Merely recently, we found graphite nanosheets tend to align in the polymer matrix under shear force, and the received nanocomposite has unique piezoresistivity [16]. Many literatures [17][18][19][20][21][22][23][24][25][26][27][28][29] have reported the alignment and assembly of particles, carbon nanotubes, and nanofibers, whereas there are very few reports on the orientation and alignment of conductive nanosheets. Because of the high aspect ratio and the flake-like shape of the GNs, unique properties are expected for the GNspolymer composites when the GNs are oriented in a certain direction.…”

Section: Introductionmentioning

confidence: 99%