Preparation and magnetisation of a silica-magnetite inverse ferrofluid

We introduce an ‘inverse ferrofluid’ comprising sterically stabilized, colloidal silica spheres and oleic acid stabilized magnetite particles. The preparation is described as well as magnetisation measurements which turns out to be a linear function of the silica volume fraction

Size Doesn't Matter: Towards a More Inclusive Philosophy of Biology

notes: As the primary author, O’Malley drafted the paper, and gathered and analysed data (scientific papers and talks). Conceptual analysis was conducted by both authors.publication-status: Publishedtypes: ArticlePhilosophers of biology, along with everyone else, generally perceive life to fall into two broad categories, the microbes and macrobes, and then pay most of their attention to the latter. ‘Macrobe’ is the word we propose for larger life forms, and we use it as part of an argument for microbial equality. We suggest that taking more notice of microbes – the dominant life form on the planet, both now and throughout evolutionary history – will transform some of the philosophy of biology’s standard ideas on ontology, evolution, taxonomy and biodiversity. We set out a number of recent developments in microbiology – including biofilm formation, chemotaxis, quorum sensing and gene transfer – that highlight microbial capacities for cooperation and communication and break down conventional thinking that microbes are solely or primarily single-celled organisms. These insights also bring new perspectives to the levels of selection debate, as well as to discussions of the evolution and nature of multicellularity, and to neo-Darwinian understandings of evolutionary mechanisms. We show how these revisions lead to further complications for microbial classification and the philosophies of systematics and biodiversity. Incorporating microbial insights into the philosophy of biology will challenge many of its assumptions, but also give greater scope and depth to its investigations

Ink-jet printing of functional polymers and materials : first international workshop in Eindhoven

This section contains reports on topical conferences. Reports are usually written at the request of the editorial office, but unsolicited contributions are also welcome. Suggestions should be sent to the editorial office of the Macromolecular journals, preferably by E-mail to [email protected]

Ink-jet printing and microwave sintering of conductive silver tracks

No abstract

Inkjet printing of polymers : state of the art and future developments

Inkjet printing is considered to be a key technology in the field of defined polymer deposition. This article provides an introduction to inkjet printing technology and a short overview of the available instrumentation. Examples of polymer inkjet printing are given, including the manufacturing of multicolor polymer light-emitting diode displays, polymer electronics, three-dimensional printing, and oral dosage forms for controlled drug release. Special emphasis is placed upon the utilized polymers and conditions, such as polymer structure, molar mass, solvents, and concentration. Studies on viscoelastic fluid jets and the formation of viscoelastic droplets under gravity indicate that strain hardening is the key parameter that determines the inkjet printability of polymer solutions

Polymer relief microstructures by inkjet etching

Inkjet etching can create a variety of structures in polymer films, such as (arrays of) holes or grooves. These form by dissoln. where a solvent droplet hits the film, followed by droplet evapn. and polymer redeposition at its pinned contact line. The hole radius, R, scales with the total no. of droplets printed at a spot, Ndr, as R ~ (NdrVdr)0.34. The width of a groove, D, scales with the total no. of drops per unit length Ndr/L as D ~ (Ndr/L)0.56. Theory predicts an exponent of 1/3 and 1/2, resp. Possible applications of inkjet etching are in the field of rapid prototyping. Proof of principle for possible electronic applications is given by creating a patterned Cr/Au-bilayer. Printing a dispersion creates polymer composite structures with encapsulated nanoparticles, as shown by SFM. [on SciFinder (R)