Shape-Controlled Synthesis and Related Growth Mechanism of Pb(OH) ₂ Nanorods by Solution-Phase Reaction

Abstract

We present a simple method to synthesize Pb(OH)2 nanorods by solution-phase reaction. Rod-like lead hydroxide precipitates are obtained by mixing lead nitrate with a concentration of about 0.01 M and potassium hydroxide with concentration of about 0.03 M in an aqueous solution. Sodium chloride as an additive is premixed with the lead nitrate aqueous solution. The presence of chloride ions in the precursor solution results in the rod-like morphology of lead hydroxide precipitates. The growth mechanism of the lead hydroxide nanorods is discussed.

A two-dimensional borophene monolayer with ideal Dirac nodal-line fermions

“…It should be noted that the Dirac nodal line discovered in the previously reported 2D flat monolayer is usually protected by an in-plane mirror symmetry σ h , 47–49 which is obviously not applicable for our case in that in-plane mirror eigenvalues are the same as the two p z -induced Dirac nodal line bands. In order to fully clarify the formation of Dirac points along the high-symmetry paths K – Γ and Γ – M , we analyze the group symmetry and their eigenvalues of the two Dirac nodal line bands.…”

“…As one of the most active research fields, searching for preferable 2D nodal line semimetals is always ongoing. Although there are quite a few theoretical studies of 2D nodal line materials, 35,38,47–49 only Cu 2 Si and CuSe have been observed experimentally. 50,51 However, strictly speaking, Cu 2 Si and CuSe are not desirable in that their nodal loops are gapped by the sizable SOC.…”