Germanium iodide mediated synthesis of nanodiamonds from adamantane “seeds” under moderate high-pressure high-temperature conditions

Mechanistic insights of seeded diamond growth from molecular precursors

“…Lately, seeded diamond growth using diamondoids as molecular precursors in presence of carbon sources has been reported in literature. 14,15 It was proposed that the decomposable carbon source, e.g. TC, breaks under higher temperatures and builds up the diamond lattice on top of the diamondoid.…”

“…Diamondoids like Ad, AdNH2, or AzaAd (Figure 1) are commonly regarded as molecular seeds for seeded diamond growth. 14,15 Therefore, we assessed the stability and reactivity of Ad, AdNH2, or AzaAd at moderate temperature (450 °C) in pyrolysis experiments. These experiments were carried out under low pressure and resulted in measured stabilities of 100% (Ad), 93% (AdNH2), and 62% (AzaAd), respectively (Figures S1, S2, S3).…”

“…13 By introducing more reactive linear hydrocarbons, synthesis of NDs from diamondoids could be achieved at even lower temperatures. 14,15 This strategy shows great promise for bottom-up diamond synthesis designed at a molecular level.…”

Recent Developments of Nanodiamond Quantum Sensors for Biological Applications

“…Over the past decades, many different strategies have been developed for the preparation of NDs, including the detonation technique, [ 38 ] high‐pressure high‐temperature (HPHT) synthesis [ 39 ] and the related seed‐growth HPHT preparation method, [ 40 ] laser ablation, [ 41 ] ultrasound cavitation, [ 42 ] chlorination of carbides, [ 43 ] cold‐compression synthesis, [ 44 ] and microfabrication. [ 45 ] Among them, only the first three methods can be used to obtain larger‐scale NDs batches, i.e., for commercialization.…”

Synthesis and Structural Properties of Adamantane‐Substituted Amines and Amides Containing an Additional Adamantane, Azaadamantane or Diamantane Moiety

“…[1] There is a growing interest in materials chemistry in the use of diamondoids for diamond formation, which is an area of research that we are focused on. In recent years, it has been shown that diamondoids such as adamantane, [3][4][5][6][7] (poly)haloadamantanes, [8][9][10] azaadamantanes, [11] adamantane carbonitrile [7] or pentamantane [12] can be used as precursors or seeds of nanodiamonds under high-pressure high-temperature conditions (HPHT synthesis) and for chemical vapor deposition methods (CVD synthesis). The presence of color centers in (nano)diamonds is responsible for their fluorescence properties, which are exploited for biomedical applications and quantum technologies such as nanoscale magnetometry, in-cell thermometry, spin cartography and qubit engineering.…”