Colloids and Interfaces with Surfactants and Polymers by James Goodwin PDF

By James Goodwin

ISBN-10: 0470518812

ISBN-13: 9780470518816

From blood to take advantage of, pumice to gelatine, such a lot scientists engage with colloids each day with none actual wisdom in their nature. construction at the good fortune of the 1st variation, Colloids and Interfaces with Surfactants and Polymers moment variation is a uncomplicated, non-technical creation to colloids and interfaces.Includes:Many useful examples of colloid and interface scienceAn greater part on fluorescence microscopy, a ordinary procedure in organic structures for the optical imaging of mobile structuresA new part on phenomenology (the precept of time/temperature superposition), which allows the experimentalist to increase the frequency diversity in their rheological instrumentsNew details on sedimentation and techniques for the regulate of sedimentation, that's severe in lots of dispersions of industrial importanceFresh remedies of conventional theoretical subject matters just like the electric double-layer, colloidal interactions, wetting habit and light-weight scattering, in addition to newer advances in polymer technology, statistical mechanics and using neutronsIn-depth discussions of everyday thoughts with arithmetic utilized in a straight-forward means so quantitative descriptions of colloid and interface homes may be derivedColloids and Interfaces with Surfactants and Polymers moment variation explains all of the basic thoughts of colloids and interfaces in addition to detailing a few of the extra complicated elements that may be worthwhile in particular functions. meant for undergraduate and graduate classes in colloids and delicate fabrics, the booklet is additionally appropriate to these within the chemical, coatings, cosmetics, ceramics, foodstuff, pharmaceutical and oil industries.For Powerpoint slides of all of the figures within the ebook, please see the trainer better half site at http://bcs.wiley.com/he-bcs/Books?action=index&bcsId=5121&itemId=0470518804

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Extra resources for Colloids and Interfaces with Surfactants and Polymers

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5 were obtained by measuring the force exerted when attempting to pull a platinum ring out of the surface. The equipment is a DuNouy ¨ tensiometer and this is just one technique for determining the surface tension of a liquid. Chapter 6 give details for several other methods. 5 illustrates the geometry of the measuring element. As a force is exerted on the ring supported perpendicular to the surface, the surface resists the displacement of the ring. In principle, the force at which the ring will detach is given by the surface tension in Newtons per metre multiplied by twice the circumference of the ring (in metres) (remember the surface makes contact with both sides of the platinum wire of the ring).

6 × 10−6 mol m−2 . 19 nm2 . The first thing to note is that the trimethylammonium head group is larger than a carboxylic acid group, but is it twice as big? – well, perhaps not. Hence the second feature that we should consider is that the group is positively charged. Like charges repel, and this acts to reduce the packing density. Let us consider the charge in more detail. e. 36 nm2 of surface. This gives a measure of the surface charge density, σ s , of ∼45 µC cm−2 . Experiments with solids, such as silver iodide, or oxides, such as titanium dioxide, yield surface charge densities in the range 1–15 µC cm−2 , so this clearly would be a very highly charged surface.

Currently, the most widespread use of quantum dots is in the life sciences area, where they are being used in cellular imaging and as molecular tags for research and diagnostic purposes. This use demands that the dots are dispersible as single particles in aqueous buffers. To achieve this, the dots are coated with an amphiphilic polymer which provides colloidal stability to the particle in an aqueous environment and provides chemical functionality for covalently linking biomolecules such as antibodies and nucleic acid oligomers.

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Colloids and Interfaces with Surfactants and Polymers by James Goodwin


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