scholarly journals Magnetoelectric micromachines with wirelessly controlled navigation and functionality

2016 ◽  
Vol 3 (2) ◽  
pp. 113-118 ◽  
Author(s):  
Xiang-Zhong Chen ◽  
Naveen Shamsudhin ◽  
Marcus Hoop ◽  
Roel Pieters ◽  
Erdem Siringil ◽  
...  

A magnetoelectric micromachine manipulated by magnetic field for both locomotion and on-demand function triggering enlighten the concept of unisource-powered microdevices.

Author(s):  
Liuyan Liu ◽  
Haoqiang Huang ◽  
Haisheng Tan ◽  
Wanli Cao ◽  
Panlong Yang ◽  
...  

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Cong Wang ◽  
Jungyul Park

AbstractIn this paper, we report a thin magnetic micropump embedded in contact lens, which is capable of on-demand one-directional drug delivery. The proposed micropump can be actuated by the external magnetic field whenever needed without the need of battery. A micro check valve was integrated with the micropump for one-directional drug delivery from the micropump to the post-lens tear film. With actuation of the external magnetic field, the micro check valve is opened, and on-demand drug release can be realized. On the contrary, without an external magnetic field, the micro check valve is closed, and the undesired drug diffusion can be prevented. Through the control of the strength and the frequency of the magnetic field pulse, on-demand drug release and controlled dose can be realized.


2015 ◽  
Vol 1 (10) ◽  
pp. 376
Author(s):  
Bhubneshwar Sharma

ATM provides functionality that is similar to bothcircuit switchingandpacket switchingnetworks: ATM usesasynchronoustime-division multiplexing, and encodes data into small, fixed-sizedpackets(ISO-OSIframes) calledcells.This differs from approaches such as theInternet ProtocolorEthernetthat use variable sized packets and frames. ATM uses aconnection-orientedmodel in which avirtual circuitmust be established between two endpoints before the actual data exchange begins. These virtual circuits may be permanent To make m-banking application a success bandwidth management is an important issue. The increased flexibility and mobility feature of wireless ATM and its bandwidth on demand function is motivating a large number of carriers towards deployment of the WATM networks. But there are certain issues which are required to be addressed in WATM. The issues are cost effective planning of network, location management and handover management


2021 ◽  
Author(s):  
Mohamad Ali Bijarchi ◽  
Mohammad Yaghoobi ◽  
Amirhossein Favakeh ◽  
Mohammad Behshad Shafii

Abstract The magnetic actuation of ferrofluid droplets offers an inspiring tool in widespread engineering and biological applications. In this study, the dynamics of ferrofluid droplet generation with a Drop-on-Demand feature under a non-uniform magnetic field is investigated by multiscale numerical modeling. Langevin equation is assumed for ferrofluid magnetic susceptibility due to the strong applied magnetic field. Large and small computational domains are considered. In the larger domain, the magnetic field is obtained by solving Maxwell equations. In the smaller domain, a coupling of continuity, Navier Stokes, two-phase flow, and Maxwell equations are solved by utilizing the magnetic field achieved by the larger domain for the boundary condition. The Finite volume method and coupling of level-set and Volume of Fluid methods are used for solving equations. The droplet formation is simulated in a two-dimensional axisymmetric domain. The method of solving fluid and magnetic equations is validated using a benchmark. Then, ferrofluid droplet formation is investigated experimentally and the numerical results are in good agreement with the experimental data. The effect of 12 dimensionless parameters including the ratio of magnetic, gravitational, and surface tension forces, the ratio of the nozzle and magnetic coil dimensions, and ferrofluid to continuous-phase properties ratios are studied. The results showed that by increasing the magnetic Bond number, gravitational Bond number, Ohnesorge number, dimensionless saturation magnetization, initial magnetic susceptibility of ferrofluid, the generated droplet diameter reduces, whereas the formation frequency increases. The same results were observed when decreasing the ferrite core diameter to outer nozzle diameter, density, and viscosity ratios.


2019 ◽  
Vol 7 (5) ◽  
pp. 1815-1824 ◽  
Author(s):  
Bing Liang ◽  
Kexiao Yu ◽  
Yi Ling ◽  
Micheal Kolios ◽  
Agata Exner ◽  
...  

We report a novel approach to transform a tumor into a “bio-magnet”, to be magnetized on demand, in order to create an intrinsic tumor magnetic field, able to collect magnetic nanoparticles circulating in the blood and achieve simultaneous magnetic hyperthermia.


2019 ◽  
Vol 121 ◽  
pp. 109264 ◽  
Author(s):  
Sara Salimi ◽  
Tahkur S. Babra ◽  
Gerald S. Dines ◽  
Stephen W. Baskerville ◽  
Wayne Hayes ◽  
...  

2006 ◽  
Vol 8 (7) ◽  
pp. 1106-1110 ◽  
Author(s):  
J WANG ◽  
M MUSAMEH ◽  
R LAOCHAROENSUK ◽  
O GONZALEZGARCIA ◽  
J ONI ◽  
...  

2021 ◽  
Author(s):  
Moataz Dowaidar

M-bots are small robots that can be actuated and localized inside the human body to aid in illness detection and treatment. Nanomaterials provide a link between robotics and nanomedicine through applications that allow for the on-demand execution of tasks via remote control via a programmable energy input. Microrobots are typically less than one millimeter in size, whereas nanorobots and M-bots are less than one meter in size.Micro- and nanoscale robots can be controlled by external fields for steering and propulsion. Using the GLAD method, nanoscale helical swimmer with a diameter of 200–300 nm and a length of only 1–2 m. capable of reaching speeds of up to 40 m s 1 when precisely controlled by a magnetic field. Ultrasonic field-related actuation may be used for a variety of m-bots, including metallic nanowire and tubular microagent propulsion, microbead rotation, and nanoparticle patterning.


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