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.
So, the cost of the print heads, (depending on the type of your printer) might increase the cost of printing per page. Toner cartridges for monochrome laser printers can cost from $50 to $200, and for color lasers the price for the toner cartridge can go up to $300 or more!