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.
Samsung Wireless Monochrome Printer (SL-M2020W/XAA... Pros: Users can print from their smart device with the Samsung SL-M2020W/XAA, printing is fast and of good quality. Toner is not much more expensive than inkjet cartridges and lasts longer. Cons: Users have reported difficulties with set up and unhelpful tech support from Samsung. Some users say prints are streaked and the machine will not print more than a few copies.