We are attempting to produce high-density arrays of surface-bound oligonucleotides for hybridization experiments. Our approach is to mechanically miniamri~ conventional DNA synthesis chemistry. Ink-jet printer heads are used to deliver small drops of reagents to a chemically modified silicon dioxide surface, where they react to synthesize DNA. The drops are confined to small areas by a pattern ...

An electrically tunable wettability in a liquid crystal/ polymer composite film is demonstrated, in which liquid crystal molecules are anchored among polymer grains. The tunable wettability of the composite films originates from the reorientation of the anchored liquid-crystal molecules, which is switched by an in-plane electric field with squared pulses of voltages. These liquid crystal/polyme...

The currently used colour rendering index is based on an outdated colour space and chromatic adaptation formula. The perceived and calculated colour rendering of new light sources shows discrepancies. This becomes acute with the introduction of LED sources and increased use of coloured samples produced by ink-jet printers and colour-photocopy. Recent colour appearance models enable an advanced ...

In recent years, the possibility of color three-dimensional printing has been introduced. The process described in this work is by ZCorporation, and is currently the only process enabling full color printing. The basic materials are in the shape of powder and binders, clear and/or colored. In order to obtain final mechanical and surface properties, 3D prints are almost always postprocessed with...

Cronin and colleagues present the use of 3D printing to manufacture and formulate antibiotics and test them in place as an alternative approach to tackling the challenge of multidrug-resistant bacteria. The robotic setup produces millifluidic devices that are filled automatically with growthmedium, and antibiotics are formulated with the help of ink-jet technology. The tests are incubated in pl...

An all-printed photosensor based on polyfluorene derivatives has been developed for high illuminance range detection (>100 klux). The active layer is a blend of hole-accepting poly(9,9’-dioctylfluorene-cobis-N,N’-(4-butylphenyl)-bis-N,N’-phenyl-1,4-phenylenediamine) (PFB) and electron-accepting poly(9,9’-dioctylfluorene-co-benzothiadiazole) (F8BT). A top-absorbing architecture was used with pol...

A new model has been developed for the surface energydriven shortening of a free, cone-shaped fluid ligament of finite length, as a function of ligament diameter, length, mass and head speed. It differs significantly from classical models based on infinitely long cylindrical (Taylor) or conical (Keller) shapes, but leads to overall shortening speeds which are very similar to those provided by T...