Self-Propelled Janus Particles

2021 ◽  
Keyword(s):  
Drug Delivery ◽  
Magnetic Fields ◽  
Molecular Motors ◽  
Environmental Remediation ◽  
Janus Particles ◽  
External Fields ◽  
Nano Scale ◽  
Electronic Engineering ◽  
Directional Motion ◽  
Bio Imaging

Design and operation of Janus particles have a great potential for applications in fields such as environmental remediation, electronic engineering, bio-imaging, bio-sensing, drug delivery and other biomedical tasks. Current research aims to imitate the molecular motors of biological systems by creating micro- and nano-scale particles which can exploit chemical energy so as to produce directional motion. The assembling of self-propelled particles and their movement can be controlled by using external fields, especially magnetic fields. The book references 332 original resources and includes their direct web link for in-depth reading.

scholarly journals Janus microdimer swimming in an oscillating magnetic field

2020 ◽  
Vol 7 (12) ◽  
pp. 200378
Author(s):  
Jinyou Yang
Keyword(s):  
Magnetic Field ◽  
Drug Delivery ◽  
Magnetic Fields ◽  
Minimally Invasive ◽  
Environmental Remediation ◽  
Magnetic Torque ◽  
Link Type ◽  
Special Direction ◽  
Oscillating Magnetic Field

Artificial microswimmers powered by magnetic fields have numerous applications, such as drug delivery, biosensing for minimally invasive medicine and environmental remediation. Recently, a Janus microdimer surface walker that can be propelled by an oscillating magnetic field near a surface was reported by Li et al. ( Adv. Funct. Mater. 28 , 1706066. ( doi:10.1002/adfm.201706066 )). To clarify the mechanism for the surface walker, we numerically studied in detail a Janus microdimer swimming near a wall actuated by an oscillating magnetic field. The results showed that a Janus microdimer in an oscillating magnetic field can produce magnetic torque in the y -direction, which eventually propels the Janus microdimer along the x -direction near a wall. Furthermore, we found that the Janus microdimer can also move along a special direction in an oscillating magnetic field with two orientations without a wall. The knowledge obtained in this study is fundamental for understanding the interactions between a Janus microdimer and surfaces in an oscillating magnetic field and is useful for controlling Janus microdimer motion with or without a wall.

scholarly journals Magnetic Janus Particles for Static and Dynamic (Bio)Sensing

2019 ◽  
Vol 5 (3) ◽  
pp. 47 ◽  
Author(s):  
Susana Campuzano ◽  
Maria Gamella ◽  
Verónica Serafín ◽  
María Pedrero ◽  
Paloma Yáñez-Sedeño ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Fields ◽  
Single Particle ◽  
Environmental Remediation ◽  
Janus Particles ◽  
Future Prospects ◽  
Remote Manipulation ◽  
Exciting Potential

Magnetic Janus particles bring together the ability of Janus particles to perform two different functions at the same time in a single particle with magnetic properties enabling their remote manipulation, which allows headed movement and orientation. This article reviews the preparation procedures and applications in the (bio)sensing field of static and self-propelled magnetic Janus particles. The main progress in the fabrication procedures and the applicability of these particles are critically discussed, also giving some clues on challenges to be dealt with and future prospects. The promising characteristics of magnetic Janus particles in the (bio)sensing field, providing increased kinetics and sensitivity and decreased times of analysis derived from the use of external magnetic fields in their manipulation, allows foreseeing their great and exciting potential in the medical and environmental remediation fields.

Microscopies at the Nanoscale for Nano-Scale Drug Delivery Systems

2015 ◽  
Vol 16 (13) ◽  
pp. 1512-1530 ◽  
Author(s):  
Luciana Dini ◽  
Elisa Panzarini ◽  
Stefania Mariano ◽  
Daniele Passeri ◽  
Melania Reggente ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Drug Delivery Systems ◽  
Delivery Systems ◽  
Nano Scale

scholarly journals Giant conductivity of mobile non-oxide domain walls

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
S. Ghara ◽  
K. Geirhos ◽  
L. Kuerten ◽  
P. Lunkenheimer ◽  
V. Tsurkan ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Domain Wall ◽  
Domain Walls ◽  
Building Blocks ◽  
External Fields ◽  
Tail Domain ◽  
Oxide Electronics ◽  
Domain Wall Mobility ◽  
Conductance Changes ◽  
Wall Mobility

AbstractAtomically sharp domain walls in ferroelectrics are considered as an ideal platform to realize easy-to-reconfigure nanoelectronic building blocks, created, manipulated and erased by external fields. However, conductive domain walls have been exclusively observed in oxides, where domain wall mobility and conductivity is largely influenced by stoichiometry and defects. Here, we report on giant conductivity of domain walls in the non-oxide ferroelectric GaV4S8. We observe conductive domain walls forming in zig-zagging structures, that are composed of head-to-head and tail-to-tail domain wall segments alternating on the nanoscale. Remarkably, both types of segments possess high conductivity, unimaginable in oxide ferroelectrics. These effectively 2D domain walls, dominating the 3D conductance, can be mobilized by magnetic fields, triggering abrupt conductance changes as large as eight orders of magnitude. These unique properties demonstrate that non-oxide ferroelectrics can be the source of novel phenomena beyond the realm of oxide electronics.

scholarly journals Sensitivity of PS/CoPd Janus particles to an external magnetic field

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17051-17057
Author(s):  
Anna Eichler-Volf ◽  
Yara Alsaadawi ◽  
Fernando Vazquez Luna ◽  
Qaiser Ali Khan ◽  
Simon Stierle ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Janus Particles ◽  
Weak Magnetic Fields

PS/CoPd Janus particles respond very sensitively to application of low external magnetic fields. Owing to the magnetic properties, the PS/CoPd particles may be used, for example, to sense the presence of weak magnetic fields as micro-magnetometers.

scholarly journals Stimuli-responsive nanobubbles for biomedical applications

2021 ◽  
Author(s):  
Ranhua Xiong ◽  
Ronald X. Xu ◽  
Chaobo Huang ◽  
Stefaan De Smedt ◽  
Kevin Braeckmans
Keyword(s):  
Drug Delivery ◽  
Biomedical Applications ◽  
Stimuli Responsive ◽  
Recent Advances ◽  
Tumor Tissues ◽  
Bio Imaging

This review presents an overview of the recent advances in the development of stimuli-responsive nanobubbles and their novel biomedical applications including bio-imaging, drug delivery and ablation of tumor tissues.

scholarly journals Cisplatin drug delivery using gold-coated iron oxide nanoparticles for enhanced tumour targeting with external magnetic fields

2012 ◽  
Vol 393 ◽  
pp. 328-333 ◽  
Author(s):  
Amelia J. Wagstaff ◽  
Sarah D. Brown ◽  
Megan R. Holden ◽  
Gemma E. Craig ◽  
Jane A. Plumb ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Iron Oxide ◽  
Magnetic Fields ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Tumour Targeting

scholarly journals Stochastically pumped adaptation and directional motion of molecular machines

2018 ◽  
Vol 115 (38) ◽  
pp. 9405-9413 ◽  
Author(s):  
R. Dean Astumian
Keyword(s):  
Single Molecule ◽  
Molecular Motors ◽  
High Efficiency ◽  
Probability Distributions ◽  
Molecular Machines ◽  
High Energy ◽  
Stochastic Thermodynamics ◽  
Recent Developments ◽  
Directional Motion ◽  
External Fluctuations

Recent developments in synthetic molecular motors and pumps have sprung from a remarkable confluence of experiment and theory. Synthetic accomplishments have facilitated the ability to design and create molecules, many of them featuring mechanically bonded components, to carry out specific functions in their environment—walking along a polymeric track, unidirectional circling of one ring about another, synthesizing stereoisomers according to an external protocol, or pumping rings onto a long rod-like molecule to form and maintain high-energy, complex, nonequilibrium structures from simpler antecedents. Progress in the theory of nanoscale stochastic thermodynamics, specifically the generalization and extension of the principle of microscopic reversibility to the single-molecule regime, has enhanced the understanding of the design requirements for achieving strong unidirectional motion and high efficiency of these synthetic molecular machines for harnessing energy from external fluctuations to carry out mechanical and/or chemical functions in their environment. A key insight is that the interaction between the fluctuations and the transition state energies plays a central role in determining the steady-state concentrations. Kinetic asymmetry, a requirement for stochastic adaptation, occurs when there is an imbalance in the effect of the fluctuations on the forward and reverse rate constants. Because of strong viscosity, the motions of the machine can be viewed as mechanical equilibrium processes where mechanical resonances are simply impossible but where the probability distributions for the state occupancies and trajectories are very different from those that would be expected at thermodynamic equilibrium.

Advanced Carbon Materials: Base of 21st Century Scientific Innovations in Chemical, Polymer, Sensing and Energy Engineering

2021 ◽  
Author(s):  
Muhammad Ikram ◽  
Ali Raza ◽  
Khurram Shahzad ◽  
Ali Haider ◽  
Junaid Haider ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Energy Storage ◽  
20Th Century ◽  
21St Century ◽  
Material Science ◽  
Environmental Remediation ◽  
Carbon Allotrope ◽  
And Performance ◽  
Hierarchical Carbon ◽  
Energy Engineering

Advance carbon material that includes graphene, fullerenes, hierarchical carbon, and CNTs are referred to as strength of revolution and advancement in the era of material science and technology. In general, 20th century corresponds to plastic meanwhile 21st century will be named as “Century of Graphene” owing to its exceptional physical properties. Graphene is now well-known and prominent 2D carbon allotrope that is considered as multipurpose material in comparison with any material discovered on earth. One of the interesting properties of graphene is strongest and lightest material that enables it to conduct electricity and heat as compared to any other material. Such features permit it to utilize in numerous applications including biosensors, electronic industry, environmental remediation, drug delivery, energy storage, and production as well. Owing to these capabilities, it can be stated that graphene can be utilized to improve effectiveness and performance of existing substances and materials. In the future, conjugation of graphene with other 2D material will be devolved to produce further remarkable compounds that make it appropriate for an extensive variety of applications. This chapter grants the utilization and applications of advanced carbons materials in chemical, polymer, sensing and energy enegineering.

Design of nano-clays for drug delivery and bio-imaging: can toxicity be an issue?

Nanomedicine ◽  
2020 ◽  
Vol 15 (25) ◽  
pp. 2429-2432
Author(s):  
Stefano Leporatti ◽  
Mariafrancesca Cascione ◽  
Valeria De Matteis ◽  
Rosaria Rinaldi
Keyword(s):  
Drug Delivery ◽  
Bio Imaging
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