Regulation of nanoporous structure of detonation nanodiamond powders by pressure: SANS study

The Role of Diamonds Dispersed in Ferronematic Liquid Crystals on Structural Properties

“…The prepared LC (5CB) composites are investigated with the main intention being to determine the effect of DNPs on structural changes under an external magnetic field, including their effect on the threshold field shift and transition temperatures for individual LC composites. The connection of the utilized experimental techniques, the results of which we report here, provided interesting results in the last decade [20][21][22].…”

“…The size of the Fe 3 O 4 nanoparticles was indicated as 11-14 nm in diameter. The nanodiamond powders analyzed in this study were obtained from Federal State Unitary Enterprise "Technolog" (St. Petersburg, Russia) [22]. The production process involved detonating a mixture of trinitrotoluene and hexogen at a ratio of 60/40 and subsequent purification.…”

“…The intensity of the transmitted light was recorded using a photodetector and subsequently registered by a computer monitoring the light transmission as a function of the magnetic field. A more detailed configuration of the experimental arrangement has been previously described [20,22].…”

“…The absorption of longitudinal waves by the LCs is then the reason that the SAW attenuation can respond to any LC orientational changes initiated by external terms and conditions, including a magnetic field or temperature so that the SAW can be used for the experimental investigation. The instability for attenuation measurement was better than ±0.02 dB and the temperature accuracy in the range of 5-80 • C was in the interval ±0.2 • C. A more detailed measurement procedure and experimental arrangement were previously described [20,22].…”