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.
Laser Printers. Normally laser printers are found in offices, however the cost for laser printers has become so reasonable that it is possible to own a professional quality laser printer in your own home. The average resolution of today's laser printer is 1200 x 1200 DPI. This resolution will give you very high quality document printouts. The majority of laser printers on the market today can print an average of 20 PPM (or more) in (black/monochrome).