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01/09/20
by Nasrin Akbari
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A ferrofluid is a specific type of liquid which responds to a magnetic field. Ferrofluids are composed of nanoscale magnetic particles suspended in a carrier fluid. The solid particles are generally stabilized with an attached surfactant layer. Ferrofluids are extremely stable meaning that they will not cluster together even in extremely strong magnetic fields
Classification:
1.surfacted (SFF), if the coating is a surfactant molecule
2.ionic (IFF), if it is an electric shell
MRF & FF?
Ferrofluids are different from the usual magnetorheological fluids (MRF) used for dampers, brakes and clutches, formed by micron sized particles dispersed in oil. In MRF the application of a magnetic field causes an enormous increase of the viscosity, so that, for strong enough fields, they may behave like a solid. On the other hand, a FF keeps its fluidity even if subjected to strong magnetic fields (» 10 kG).
1.https://www.slideserve.com/tan/ferrofluids
2.C. Scherer* and A. M. Figueiredo Neto(Received on 28 July, 2005).chemical sociey reviews
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https://www.slideserve.com/tan/ferrofluids
A process for making a ferrofluid was invented in 1963 by Steve Popple of NASA to create a liquid rocket fuel that, using a magnetic field, could eventually lead to a fuel pump in a weightless environment.
view-source:https://www.google.com/search?q=ferrofluid&oq=f&aqs=chrome.1.69i60j69i59l4j69i61j69i60l2.2600j0j7&sourceid=chrome&ie=UTF-8
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1.C. Scherer* and A. M. Figueiredo Neto(Received on 28 July, 2005).chemical sociey reviews
2.https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.pinterest.com%2Fpin%2F278871401896654100%2F&psig=AOvVaw1SPPday3QS8ln_kOZ63-3o&ust=1670398010128000&source=images&cd=vfe&ved=2ahUKEwj5rr7Ru-T7AhUQGRoKHUqCCQUQr4kDegUIARDLAQ
https://www.slideserve.com/tan/ferrofluids
Unique Properties
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https://en.wikipedia.org/wiki/Ferrofluid
6. b) Optical images of ferrofluid droplet divisiona
Behavior of ferrofluid droplet array under an enhancing magnetic field (a) and a rotating magnetic field
(b). c) Scheme of an example of ferrofluid-based fabrication process. d,e) Optical and scanning electron
microscopy (SEM) images of the polymer template derived from ferrofluid arrays. f–h) The nepenthes
peristome-inspired anisotropic surfaces based on ferrofluid-assembled templates. The scale bars are 50
μm. a–h) Reproduced with permission.[51] Copyright 2017, Wiley-VCH
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https://www.slideserve.com/tan/ferrofluids
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1. https://www.slideserve.com/tan/ferrofluids
2.https://www.google.com/search?
3.C. Scherer* and A. M. Figueiredo Neto(Received on 28 July, 2005).chemical sociey reviews
4.https://noqreco.com/%D9%BE%D8%AE%D8%B4-%DA
5.S. S. Papell, U.S. Patent no 3, 215, 572 (1965)
M. Magalhães, A. M. Figueiredo Neto, A. Bee, and A. Bourdon, J. Chem. Phys. 113, 10246 (20006.