Interaction between alkali metals and diamond: Etching and charge states of NV centers

Interaction between diamond and alkali metals and its application to machining of diamond

“…The authors previously reported on interaction between single‐crystal diamonds about 0.3 mm in size fabricated by high‐pressure, high‐temperature method and alkali metals under Ar atmosphere sealed in a Nb capsule 1 . This paper presents new calculation results concerning diamond etching with Li considered in the previous paper, 1 and reports on experimental results obtained by applying alkali metal salt solutions to discharge machining.…”

“…This paper presents new calculation results concerning diamond etching with Li considered in the previous paper, 1 and reports on experimental results obtained by applying alkali metal salt solutions to discharge machining. As regards diamond etching through reactions with metals, there are studies on reactions with rare‐earth metals 2 and with water vapor under Ni catalytic action, 3 or at interfaces with KNO 3 catalyst 4 and KOH + KCl catalyst, 5 but the mentioned paper 1 was the first one exploring reactions with alkali metals.…”

Effect of Dopants on Σ3 (111) Grain Boundary in Diamond

“…[4,[20][21][22][23][24][25][26][27][28][29][30] Impurities incorporated during the growth process not only affect the conductivity but also exert influence over various other factors, such as morphology and growth rate of diamond. [4,[20][21][22][23][24][25][26][27][28][29][30] Prior research has provided evidence of successful production of p-type diamond through boron doping. [27][28][29]31,32] The introduction of boron impurities result in a characteristic impurity level of 0.37 eV in the doped diamond, with concentrations spanning from 1014 to 1021 cm À3 .…”

“…[22,33] Similarly, interstitial lithium (Li) and sodium (Na) have been proposed as potential alternatives; though, the majority of experimental investigations have consistently reported high resistivity or limited electrical activity in Li-and Na-doped diamond. [20,23,[36][37][38] The previously held Extensive research has been conducted on electronic properties of metal-doped diamond for electrochemical applications. The codoped diamond has emerged as an important strategy to enhance their performance and impart novel characteristics.…”

“…Experimental findings have demonstrated that the Li-B-co-doped diamond exhibits n-type conductivity with resistivity ranging from 0.01 to 0.02 Ω m. [42] Similarly, with the help of ab initio density-functional theory (DFT), researchers investigated Li-and Nadoped diamond materials. [20,23,36] The analysis revealed that the Li atoms occupy interstitial positions within the diamond lattice, while Na atom substitutes the carbon atoms in the lattice. [20,23,36] In the case of diamond doped with both Li and phosphorus, it was observed that the Li-P interactions could induce a splitting of the energy band near the Fermi level, leading to enhance the electron conductivity in thin films of Li-P-co-doped diamond.…”