Nanografi Nanotechnology

photo retrieved from  https://uwaterloo.ca/chemistry/international-year-chemistry/periodic-table-project/holmium - Holmium is a chemical element with symbol Ho and atomic number 67. - Holmium is a rare earth element. - Holmium is a bright, soft, silvery-white, rare earth metal that is both ductile and malleable. - Holmium does not react in dry air at normal temperatures, but rapidly oxidizes to a yellow oxide (Ho2O3) in moist air or when heated. - Holmium has unusual magnetic properties, including the highest magnetic moment (10.6 µB) of any naturally occurring element. - As a result of its special magnetic properties, holmium is used in alloys for the production of magnets and as a flux concentrator for high magnetic fields. - Holmium is considered to be of low toxicity. - Holmia (holmium oxide) is used as a yellow or red coloring for glass and cubic zirconia. - Holmium isotopes are good neutron absorbers and are used in nuclear react...

                                            photo retrieved from  http://www.angrysquirrelstudio.com/samarium-the-classic-periodic-table-illustrated/ - Samarium is a chemical element with chemical Sm and atomic number 62 with an atomic weight of 150.4. -  Samarium is a silvery-white metal belonging to the lanthanide group of the periodic table. - Samarium is a rare earth element. - Samarium is relatively stable at room temperature in dry air, but it ignites when heated above 150 °C and forms an oxide coating in moist air. - Samarium has a relatively stable oxidation state. - Samarium is used as a catalyst in certain organic reactions: for example in organic research, chemists use to make synthetic versions of natural products. - The oxide, Samaria , is used for making special infrared adsorbing glass and cores of carbon arc-lamp electrodes and as a catal...