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.
Basic ebook readers use monochrome, E Ink screens to display text. E Ink looks a lot like paper, and it's easy on your eyes when reading for long periods. On the least expensive models, it's not backlit, so you'll need light to see the text, just as you would with a printed book.