TEM (a, b, and c) images of prepared mesoporous silica nanoparticles with mean outer diameter: (a) 20nm, (b) 45nm, and (c) 80nm. SEM (d) image corresponding to (b). The insets are a high magnification of mesoporous silica particle.
The Definition of a Monochrome Laser Printer. Monochrome laser printers are machines that print text and images from computers by using a laser beam to control where a single color is applied to paper. They're often faster than other types of printers and can generally produce large numbers of black-and-white documents cheaper than other printers.
As a rule of thumb, the cheaper the printer, the smaller the cartridge, and the lower the page yield.. Samsung's ML2160 monochrome laser printer, for example, costs about Â£50. But the cartridges also cost Â£50 â and print a comparatively modest 1,500 pages.