Nacionalni portal odprte znanosti

In a first part, I will briefly survey how a magnetic field can be used in order to focus an electron beam and then how a transmission electron microscope works. Recent experimental developments such as the correction of the spherical aberration of electron lenses and the resulting atomic resolu ...

$α-MnO_2$ nanorods were synthesized via the hydrothermal decomposition of $KMnO_4$ in an acidic environment in the presence of $Co^{2+}$ and $Cr^{3+}$ ions. Reactions were carried out at three different temperatures: 90, 130 and 170 °C. All prepared samples exhibit a tetragonal $MnO_2$ crystalline p ...