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Zeitschriftenartikel zum Thema „Hydrogenated nanodiamonds“

Autor: Grafiati

Veröffentlicht am 9. Dezember 2023

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1

Claveau, Sandra, Émilie Nehlig, Sébastien Garcia-Argote, Sophie Feuillastre, Grégory Pieters, Hugues A. Girard, Jean-Charles Arnault, François Treussart und Jean-Rémi Bertrand. „Delivery of siRNA to Ewing Sarcoma Tumor Xenografted on Mice, Using Hydrogenated Detonation Nanodiamonds: Treatment Efficacy and Tissue Distribution“. Nanomaterials 10, Nr. 3 (19.03.2020): 553. http://dx.doi.org/10.3390/nano10030553.

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Nanodiamonds of detonation origin are promising delivery agents of anti-cancer therapeutic compounds in a whole organism like mouse, owing to their versatile surface chemistry and ultra-small 5 nm average primary size compatible with natural elimination routes. However, to date, little is known about tissue distribution, elimination pathways and efficacy of nanodiamonds-based therapy in mice. In this report, we studied the capacity of cationic hydrogenated detonation nanodiamonds to carry active small interfering RNA (siRNA) in a mice model of Ewing sarcoma, a bone cancer of young adults due in the vast majority to the EWS-FLI1 junction oncogene. Replacing hydrogen gas by its radioactive analog tritium gas led to the formation of labeled nanodiamonds and allowed us to investigate their distribution throughout mouse organs and their excretion in urine and feces. We also demonstrated that siRNA directed against EWS-FLI1 inhibited this oncogene expression in tumor xenografted on mice. This work is a significant step to establish cationic hydrogenated detonation nanodiamond as an effective agent for in vivo delivery of active siRNA.

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2

Thalassinos, Giannis, Alastair Stacey, Nikolai Dontschuk, Billy J. Murdoch, Edwin Mayes, Hugues A. Girard, Ibrahim M. Abdullahi et al. „Fluorescence and Physico-Chemical Properties of Hydrogenated Detonation Nanodiamonds“. C — Journal of Carbon Research 6, Nr. 1 (07.02.2020): 7. http://dx.doi.org/10.3390/c6010007.

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Hydrogenated detonation nanodiamonds are of great interest for emerging applications in areas from biology and medicine to lubrication. Here, we compare the two main hydrogenation techniques—annealing in hydrogen and plasma-assisted hydrogenation—for the creation of detonation nanodiamonds with a hydrogen terminated surface from the same starting material. Synchrotron-based soft X-ray spectroscopy, infrared absorption spectroscopy, and electron energy loss spectroscopy were employed to quantify diamond and non-diamond carbon contents and determine the surface chemistries of all samples. Dynamic light scattering was used to study the particles’ colloidal properties in water. For the first time, steady-state and time-resolved fluorescence spectroscopy analysis at temperatures from room temperature down to 10 K was performed to investigate the particles’ fluorescence properties. Our results show that both hydrogenation techniques produce hydrogenated detonation nanodiamonds with overall similar physico-chemical and fluorescence properties.

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3

Arnault, J. C., und H. A. Girard. „Hydrogenated nanodiamonds: Synthesis and surface properties“. Current Opinion in Solid State and Materials Science 21, Nr. 1 (Februar 2017): 10–16. http://dx.doi.org/10.1016/j.cossms.2016.06.007.

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4

Kurzyp, Magdalena, Hugues A. Girard, Yannis Cheref, Emilie Brun, Cecile Sicard-Roselli, Samuel Saada und Jean-Charles Arnault. „Hydroxyl radical production induced by plasma hydrogenated nanodiamonds under X-ray irradiation“. Chemical Communications 53, Nr. 7 (2017): 1237–40. http://dx.doi.org/10.1039/c6cc08895c.

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5

Girard, H. A., T. Petit, S. Perruchas, T. Gacoin, C. Gesset, J. C. Arnault und P. Bergonzo. „Surface properties of hydrogenated nanodiamonds: a chemical investigation“. Physical Chemistry Chemical Physics 13, Nr. 24 (2011): 11517. http://dx.doi.org/10.1039/c1cp20424f.

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6

Petit, Tristan, Ljiljana Puskar, Tatiana Dolenko, Sneha Choudhury, Eglof Ritter, Sergey Burikov, Kirill Laptinskiy et al. „Unusual Water Hydrogen Bond Network around Hydrogenated Nanodiamonds“. Journal of Physical Chemistry C 121, Nr. 9 (24.02.2017): 5185–94. http://dx.doi.org/10.1021/acs.jpcc.7b00721.

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7

Butenko, Yu V., P. R. Coxon, M. Yeganeh, A. C. Brieva, K. Liddell, V. R. Dhanak und L. Šiller. „Stability of hydrogenated nanodiamonds under extreme ultraviolet irradiation“. Diamond and Related Materials 17, Nr. 6 (Juni 2008): 962–66. http://dx.doi.org/10.1016/j.diamond.2008.02.026.

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8

Bydzovska, Irena, Ekaterina Shagieva, Ivan Gordeev, Oleksandr Romanyuk, Zuzana Nemeckova, Jiri Henych, Lukas Ondic, Alexander Kromka und Stepan Stehlik. „Laser-Induced Modification of Hydrogenated Detonation Nanodiamonds in Ethanol“. Nanomaterials 11, Nr. 9 (31.08.2021): 2251. http://dx.doi.org/10.3390/nano11092251.

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Apart from the frequently used high-temperature annealing of detonation nanodiamonds (DNDs) in an inert environment, laser irradiation of DNDs in a liquid can be effectively used for onion-like carbon (OLC) formation. Here, we used fully de-aggregated hydrogenated DNDs (H-DNDs) dispersed in ethanol, which were irradiated for up to 60 min using a 532 nm NdYAG laser with an energy of 150 mJ in a pulse (5 J/cm2) at a pulse duration of 10 ns and a repetition rate of 10 Hz. We investigated the DND surface chemistry, zeta potential, and structure as a function of laser irradiation time. Infrared spectroscopy revealed a monotonical decrease in the C–Hx band intensities and an increase of the C–O and C=O features. Transmission electron microscopy (TEM) revealed the formation of OLC, as well as a gradual loss of nanoparticle character, with increasing irradiation time. Surprisingly, for samples irradiated up to 40 min, the typical and unchanged DND Raman spectrum was recovered after their annealing in air at 450 °C for 300 min. This finding indicates the inhomogeneous sp3 to sp2 carbon transformation during laser irradiation, as well as the insensitivity of DND Raman spectra to surface chemistry, size, and transient structural changes.

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9

Zhuang, Chunqiang, Xue Jiang, Jijun Zhao, Bin Wen und Xin Jiang. „Infrared spectra of hydrogenated nanodiamonds by first-principles simulations“. Physica E: Low-dimensional Systems and Nanostructures 41, Nr. 8 (August 2009): 1427–32. http://dx.doi.org/10.1016/j.physe.2009.04.011.

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10

Grall, Romain, Hugues Girard, Lina Saad, Tristan Petit, Céline Gesset, Mathilde Combis-Schlumberger, Vincent Paget, Jozo Delic, Jean-Charles Arnault und Sylvie Chevillard. „Impairing the radioresistance of cancer cells by hydrogenated nanodiamonds“. Biomaterials 61 (August 2015): 290–98. http://dx.doi.org/10.1016/j.biomaterials.2015.05.034.

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11

Jirásek, Vít, Štěpán Stehlík, Pavla Štenclová, Anna Artemenko, Bohuslav Rezek und Alexander Kromka. „Hydroxylation and self-assembly of colloidal hydrogenated nanodiamonds by aqueous oxygen radicals from atmospheric pressure plasma jet“. RSC Advances 8, Nr. 66 (2018): 37681–92. http://dx.doi.org/10.1039/c8ra07873d.

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12

Miliaieva, Daria, Stepan Stehlik, Pavla Stenclova und Bohuslav Rezek. „Synthesis of polypyrrole on nanodiamonds with hydrogenated and oxidized surfaces“. physica status solidi (a) 213, Nr. 10 (28.09.2016): 2687–92. http://dx.doi.org/10.1002/pssa.201600278.

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13

Čermák, Jan, Halyna Kozak, Štěpán Stehlík, Vladimír Švrček, Vincent Pichot, Denis Spitzer, Alexander Kromka und Bohuslav Rezek. „Microscopic Electrical Conductivity of Nanodiamonds after Thermal and Plasma Treatments“. MRS Advances 1, Nr. 16 (2016): 1105–11. http://dx.doi.org/10.1557/adv.2016.112.

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ABSTRACTAtomic force microscopy (AFM) is used to measure local electrical conductivity of HPHT nanodiamonds (NDs) dispersed on Au substrate in the as-received state and after thermal or plasma treatments. Oxygen-treated NDs are highly electrically resistive, whereas on hydrogen-treated NDs electric current around -200 pA at -2 V is detected. The as-received NDs as well as NDs after an underwater radio-frequency (RF) plasma or laser irradiation (LI) treatments contain both electrically conductive (two types: highly and weakly conductive) and highly resistive particles. The higher conductivity is attributed to H-terminated (RF) or graphitized (LI) NDs. The lower conductivity is attributed to NDs with hydrogenated amorphous carbon shell.

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14

Arnault, Jean-Charles, Tristan Petit, Hugues Girard, Anthony Chavanne, Céline Gesset, Mohamed Sennour und Marc Chaigneau. „Surface chemical modifications and surface reactivity of nanodiamonds hydrogenated by CVD plasma“. Physical Chemistry Chemical Physics 13, Nr. 24 (2011): 11481. http://dx.doi.org/10.1039/c1cp20109c.

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15

Stehlik, S., T. Glatzel, V. Pichot, R. Pawlak, E. Meyer, D. Spitzer und B. Rezek. „Water interaction with hydrogenated and oxidized detonation nanodiamonds — Microscopic and spectroscopic analyses“. Diamond and Related Materials 63 (März 2016): 97–102. http://dx.doi.org/10.1016/j.diamond.2015.08.016.

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16

Zhang, Zhenkui, Ying Dai und Baibiao Huang. „The electronic properties and electron affinity of the hydrogenated nanodiamonds with surface reconstructions“. Applied Surface Science 255, Nr. 5 (Dezember 2008): 2623–26. http://dx.doi.org/10.1016/j.apsusc.2008.07.168.

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17

Chen, Tao, und Aigen Li. „Synthesizing carbon nanotubes in space“. Astronomy & Astrophysics 631 (18.10.2019): A54. http://dx.doi.org/10.1051/0004-6361/201935789.

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Context. As the fourth most abundant element in the universe, carbon (C) is widespread in the interstellar medium (ISM) in various allotropic forms (e.g. fullerenes have been identified unambiguously in many astronomical environments, the presence of polycyclic aromatic hydrocarbon molecules in space has been commonly acknowledged, and presolar graphite, as well as nanodiamonds, have been identified in meteorites). As stable allotropes of these species, whether carbon nanotubes (CNTs) and their hydrogenated counterparts are also present in the ISM or not is unknown. Aims. The aim of the present works is to explore the possible routes for the formation of CNTs in the ISM and calculate their fingerprint vibrational spectral features in the infrared (IR). Methods. We studied the hydrogen-abstraction and acetylene-addition (HACA) mechanism and investigated the synthesis of nanotubes using density functional theory (DFT). The IR vibrational spectra of CNTs and hydrogenated nanotubes (HNTs), as well as their cations, were obtained with DFT. Results. We find that CNTs could be synthesized in space through a feasible formation pathway. CNTs and cationic CNTs, as well as their hydrogenated counterparts, exhibit intense vibrational transitions in the IR. Their possible presence in the ISM could be investigated by comparing the calculated vibrational spectra with astronomical observations made by the Infrared Space Observatory, Spitzer Space Telescope, and particularly the upcoming James Webb Space Telescope.

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18

Sheu, S. Y., I. P. Lee, Y. T. Lee und H. C. Chang. „Laboratory Investigation of Hydrogenated Diamond Surfaces: Implications for the Formation and Size of Interstellar Nanodiamonds“. Astrophysical Journal 581, Nr. 1 (10.12.2002): L55—L58. http://dx.doi.org/10.1086/345519.

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19

ZHANG, ZHENKUI, und YING DAI. „STUDY OF ELECTRONIC STRUCTURE AND NEGATIVE ELECTRON AFFINITY OF NANODIAMONDS PASSIVATED BY CHn SPECIES“. Journal of Theoretical and Computational Chemistry 09, Nr. 01 (Februar 2010): 353–63. http://dx.doi.org/10.1142/s0219633610005670.

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A series of diamond nanoparticles with different surface terminations, (I) CH n (n = 1, 2) and (II) CH n (n = 1–3) species, have been investigated by means of density functional theory (DFT) to probe the effects of the terminated CH n species on the geometric and electronic structures and related properties. Our results show that quantum confinement effects of HOMO–LUMO gap occurs for the series I particles with size up to 1.1 nm, in contrast to the much weaker decay of the gap for larger size. With the existence of additional CH3 species, for size larger than 1 nm, the series II particles have larger gaps than the series I counterparts, which may be even larger than that of bulk diamond. The compositions of HOMO and LUMO are responsible for the different behaviors in the quantum confinement, which agrees with the experimentally observed spectral feature in the X-ray absorption measurement. In addition, our results show that the negative electron affinity is strongly dependent on the C/H ratio for the hydrogenated diamond nanoparticles.

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20

Machova, Iva, Martin Hubalek, Tereza Belinova, Anna Fucikova, Stepan Stehlik, Bohuslav Rezek und Marie Hubalek Kalbacova. „The bio-chemically selective interaction of hydrogenated and oxidized ultra-small nanodiamonds with proteins and cells“. Carbon 162 (Juni 2020): 650–61. http://dx.doi.org/10.1016/j.carbon.2020.02.061.

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21

Varzi, Veronica, Emiliano Fratini, Mauro Falconieri, Daniela Giovannini, Alessia Cemmi, Jessica Scifo, Ilaria Di Sarcina et al. „Nanodiamond Effects on Cancer Cell Radiosensitivity: The Interplay between Their Chemical/Physical Characteristics and the Irradiation Energy“. International Journal of Molecular Sciences 24, Nr. 23 (22.11.2023): 16622. http://dx.doi.org/10.3390/ijms242316622.

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Nanoparticles are being increasingly studied to enhance radiation effects. Among them, nanodiamonds (NDs) are taken into great consideration due to their low toxicity, inertness, chemical stability, and the possibility of surface functionalization. The objective of this study is to explore the influence of the chemical/physical properties of NDs on cellular radiosensitivity to combined treatments with radiation beams of different energies. DAOY, a human radioresistant medulloblastoma cell line was treated with NDs—differing for surface modifications [hydrogenated (H-NDs) and oxidized (OX-NDs)], size, and concentration—and analysed for (i) ND internalization and intracellular localization, (ii) clonogenic survival after combined treatment with different radiation beam energies and (iii) DNA damage and apoptosis, to explore the nature of ND–radiation biological interactions. Results show that chemical/physical characteristics of NDs are crucial in determining cell toxicity, with hydrogenated NDs (H-NDs) decreasing either cellular viability when administered alone, or cell survival when combined with radiation, depending on ND size and concentration, while OX-NDs do not. Also, irradiation at high energy (γ-rays at 1.25 MeV), in combination with H-NDs, is more efficient in eliciting radiosensitisation when compared to irradiation at lower energy (X-rays at 250 kVp). Finally, the molecular mechanisms of ND radiosensitisation was addressed, demonstrating that cell killing is mediated by the induction of Caspase-3-dependent apoptosis that is independent to DNA damage. Identifying the optimal combination of ND characteristics and radiation energy has the potential to offer a promising therapeutic strategy for tackling radioresistant cancers using H-NDs in conjunction with high-energy radiation.

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Bertrand, Jean-Rémi, Catherine Pioche-Durieu, Juan Ayala, Tristan Petit, Hugues A. Girard, Claude P. Malvy, Eric Le Cam, François Treussart und Jean-Charles Arnault. „Plasma hydrogenated cationic detonation nanodiamonds efficiently deliver to human cells in culture functional siRNA targeting the Ewing sarcoma junction oncogene“. Biomaterials 45 (März 2015): 93–98. http://dx.doi.org/10.1016/j.biomaterials.2014.12.007.

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23

Brunbauer, F. M., C. Chatterjee, G. Cicala, A. Cicuttin, P. Ciliberti, M. L. Crespo, D. D’Ago et al. „Employment of nanodiamond photocathodes on MPGD-based HEP detector at the future EIC“. Journal of Physics: Conference Series 2374, Nr. 1 (01.11.2022): 012140. http://dx.doi.org/10.1088/1742-6596/2374/1/012140.

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In high momenta range, the construction of a Ring Imaging CHerenkov (RICH) detector for the particle identification at the future Electron Ion Collider (EIC) is a complicated task. A compact collider setup imposes to construct a RICH with a short radiator length, hence limiting the number of photons. The number of photons can be increase by choosing to work in far UV region. However, as standard fused-silica windows are opaque below 165 nm, therefore, a windowless RICH approach could be a possible choice. In the far UV range, CsI is a widely used photo-cathode (PC) to detect photons, but because of its hygroscopic nature, it is very delicate to handle. Its Quantum Efficiency (QE) degrades in high intensity ion fluxes. These are the key reasons to search a novel, less delicate PC with sensitivity in the far UV region. Hydrogenated nanodiamond films are proposed as an alternative PC material and shown to have promising characteristics. The performance of nanodiamond PC coupled to THGEM-based detectors is the objects of our ongoing R & D. The first phase of these studies includes the characterization of THGEMs coated with nanodiamont PC, the comparison of the effective QE in vacuum and in gaseous atmospheres, the hardness respect to the PC bombardment by ions from the multiplication process. The approach is described in detail as well as all the results obtained so far with these exploratory studies.

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Joly, V. L. Joseph, Kazuyuki Takai, Manabu Kiguchi, Naoki Komatsu und Toshiaki Enoki. „Anomalous spin relaxation in graphene nanostructures on the high temperature annealed surface of hydrogenated diamond nanoparticles“. Physical Chemistry Chemical Physics 23, Nr. 35 (2021): 19209–18. http://dx.doi.org/10.1039/d1cp00921d.

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The magnetization relaxation rate of graphene nanostructures created on the surface of hydrogenated nanodiamond by high temperature annealing is explained in terms of a combination of the non-Arrhenius thermal process and the tunneling process.

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Korolkov, V. V., I. I. Kulakova, B. N. Tarasevich und G. V. Lisichkin. „Dual reaction capacity of hydrogenated nanodiamond“. Diamond and Related Materials 16, Nr. 12 (Dezember 2007): 2129–32. http://dx.doi.org/10.1016/j.diamond.2007.07.018.

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26

Zhao, Xuxin, Tao Wang, Yaoyao Li, Lei Huang und Stephan Handschuh-Wang. „Polydimethylsiloxane/Nanodiamond Composite Sponge for Enhanced Mechanical or Wettability Performance“. Polymers 11, Nr. 6 (01.06.2019): 948. http://dx.doi.org/10.3390/polym11060948.

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Polydimethylsiloxane (PDMS) is widely utilized in material science, chemical engineering, and environmental science due to its excellent properties. By utilizing fillers, so-called composite materials can be obtained with enhanced mechanical, wettability, or thermal conductivity performance. Here, we present a simple, cost-effective approach to vary either the mechanical properties (Young’s modulus) or surface wettability of bulk PDMS and PDMS sponges simply by adding nanodiamond filler with different surface terminations, either oxidized (oND) or hydrogenated (reduced, rND) nanodiamond. Minuscule amounts of oxidized nanodiamond particles as filler showed to benefit the compressive Young’s modulus of composite sponges with up to a 52% increase in its value, while the wettability of composite sponges was unaffected. In contrast, adding reduced nanodiamond particles to PDMS yielded inclined water contact angles on the PDMS/nanodiamond composite sponges. Finally, we show that the PDMS/rND composites are readily utilized as an absorbent for oil/water separation problems. This signifies that the surface termination of the ND particle has a crucial effect on the performance of the composite.

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Kondo, Takeshi, Ioannis Neitzel, Vadym N. Mochalin, Junichi Urai, Makoto Yuasa und Yury Gogotsi. „Electrical conductivity of thermally hydrogenated nanodiamond powders“. Journal of Applied Physics 113, Nr. 21 (07.06.2013): 214307. http://dx.doi.org/10.1063/1.4809549.

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Russo, S. P., A. S. Barnard und I. K. Snook. „Hydrogenation of Nanodiamond Surfaces: Structure and Effects on Crystalline Stability“. Surface Review and Letters 10, Nr. 02n03 (April 2003): 233–39. http://dx.doi.org/10.1142/s0218625x03004998.

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Presented are results of our ab initio study of the surface reconstruction and relaxation of (100) surfaces on bulk and nanocrystalline diamond. We have used a density functional theory (DFT) within the generalized-gradient approximation (GGA) via the parallel computer version of the Vienna ab initio simulation package (VASP), to consider dehydrogenated and hydrogenated surfaces. Edges and corners of nanocrystals offer a new challenge in the determination of surface structure. We have applied the methodology for stepped diamond (100) surfaces to this problem, and consider it useful in describing nanodiamond edges and corners to first approximation. Our results also indicate that dimer lengths and atomic layer depths of the C(100)(2 × 1) and C(100)(2 × 1):H nanodiamond surfaces differ slightly from those of bulk diamond. The effects of these differences on crystalline stability are discussed, with the intension of offering a better understanding of the effects of nanodiamond surfaces on the stability of diamondoid nanostructures.

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Wen, Bin, Jijun Zhao und Tingju Li. „Relative stability of hydrogenated nanodiamond and nanographite from density function theory“. Chemical Physics Letters 441, Nr. 4-6 (Juni 2007): 318–21. http://dx.doi.org/10.1016/j.cplett.2007.05.054.

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Wang, C., B. Zheng, W. T. Zheng, C. Q. Qu, L. Qiao, S. S. Yu und Q. Jiang. „First-principles density-functional investigation on the electronic properties and field emission of a hydrogenated nanodiamond“. Diamond and Related Materials 18, Nr. 10 (Oktober 2009): 1310–15. http://dx.doi.org/10.1016/j.diamond.2009.07.004.

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„THE NATURE OF THE ELECTRORHEOLOGICAL AND ELECTROPHORETIC EFFECTS OF DETONATION NANODIAMONDS SUSPENSIONS IN MINERAL OIL“. ChemChemTech 65, Nr. 10 (2022): 61–69. http://dx.doi.org/10.6060/ivkkt.20226510.6613.

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Qualitative differences in the nature of the electrorheological response of a detonation nanodiamonds suspensions in mineral oil depending on the type of particle surface functionalization were established from a number of rotational and oscillation tests. The type of modification and the chemical composition of the surface for particles of hydrogenated and carboxylated nanodiamonds were studied by infrared spectroscopy. Particles morphology and their structural organization in a mineral oil medium were studied by small-angle X-ray scattering method. It was found that suspensions of hydrogenated and carboxylated particles under an electric field exhibit an electrorheological and electrophoretic effects, respectively. The reasons for the electrophoretic motion of carboxylated nanodiamonds in a mineral oil medium were analyzed in comparison with the previously observed effect in the medium of weakly amphiphilic polydimethylsiloxane (silicon oil). The water content on the surface of both hydrogenated and carboxylated nanodiamond particles was determined by Karl Fischer titration of suspensions. The correlation between the electrophoretic effect and the adsorbed water content on the surface of the particles was suggested. The method of rotational viscometry revealed the dependences of the static yield stress for suspensions filled with hydrogenated and carboxylated nanodiamonds at various electric field strength. The flow curves of the fluid filled with hydrogenated particles without and under an electric field were fitted by Bingham and Cho-Choi-Jhon rheological models. An analysis of the used models matching to practical results was performed. Based on the dependences of the storage and loss moduli on the deformation amplitude, a linear range of the viscoelastic properties of the fluid was revealed. An increase in the values of the storage and loss moduli, as well as a narrowing of the linear viscoelasticity range with an increase in the electric field strength was detected.

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Hinzmann, Carsten, Drew F. Parsons, Johannes Fiedler, Justas Zalieckas und Bodil Holst. „Nanodiamond-treated flax: improving properties of natural fibers“. Cellulose, 01.12.2023. http://dx.doi.org/10.1007/s10570-023-05585-y.

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AbstractSynthetic fibers are used extensively as reinforcement in composite materials, but many of them face environmental concerns such as high energy consumption during production and complicated decommissioning. Natural fibers have been considered as an attractive solution for making composites more sustainable. However, they are generally not as strong as synthetic fibers. It is therefore of interest to investigate ways to improve the properties of natural fibers without compromising environmental issues. Here, we present a study of the moisture absorption and mechanical properties of flax that has been exposed to hydrogenated nanodiamonds through an ultrasonic dispersion treatment. Nanodiamonds are known to be non-toxic, unlike many other carbon-based nanomaterials. We show that nanodiamond-treated flax fabric has a lower moisture content (~ −18%), lower moisture absorption rate and better abrasion resistance (~ +30%). Single yarns, extracted from the fabric, show higher tensile strength (~ +24%) compared to untreated flax. Furthermore, we present a theoretical model for the nanodiamond fiber interaction, based on the Derjgauin–Landau–Verwey–Overbeek (DLVO) theory of colloid interactions. The simulations indicate that the mechanical properties improve due to an enhancement of the electrolytic force, dispersion force and hydrogen bonding of nanodiamond-treated fibers, which strengthens the cohesion between the fibers. We also apply the model to nanodiamond-treated cotton. The lower zeta potential of cotton increases the electrolytic force. Comparing the results to experimental data of nanodiamond-treated flax and nanodiamond-treated cotton suggests that the fiber’s zeta potential is critical for the improvements of their mechanical properties. Graphical abstract

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Zandieh, Mohamad, und Juewen Liu. „Metal-Mediated DNA Adsorption on Carboxylated, Hydroxylated, and Hydrogenated Nanodiamonds“. Langmuir, 08.08.2023. http://dx.doi.org/10.1021/acs.langmuir.3c01066.

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34

Saoudi, Lorris, Hugues Girard, Eric Larquet, Michel Mermoux, Jocelyne Leroy und Jean-Charles Arnault. „Colloid stability over months of highly crystalline high-pressure high-temperature hydrogenated nanodiamonds in water“. Carbon, November 2022. http://dx.doi.org/10.1016/j.carbon.2022.10.084.

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Vörös, Márton, Tamás Demjén und Adam Gali. „The Absorption of Diamondoids from Time-dependent Density Functional Calculations“. MRS Proceedings 1370 (2011). http://dx.doi.org/10.1557/opl.2011.893.

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ABSTRACTDiamondoids are small diamond nanocrystals with perfect hydrogenated surfaces. Recent absorption measurements showed that the spectrum of diamondoids exhibit features that are not understood from the theoretical point of view, e.g. optical gaps are only slightly larger than the gap of bulk diamond which runs against the quantum confinement effect. Previous calcula-tions, even beyond standard density functional theory (DFT), failed to obtain the experimental optical gaps (Eg) of diamondoids. We show that all-electron time-dependent DFT (TD-DFT) calculations including the PBE0 hybrid functional in the TD-DFT kernel are able to provide quantitatively accurate results. Our calculations demonstrate that Rydberg transitions govern the low energy part of the absorption spectrum, even for relatively large nanodiamonds result-ing in low Eg. Since the optical gap of these diamondoids lies in the ultraviolet spectral re-gion, we investigated whether simple adsorbates of the surface are able to shift the gap towards the infrared region. We found that a double bonded sulfur atom at the surface results in a sub-stantial gap reduction.

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Miliaieva, Daria, Petra Matunova, Jan Cermak, Stepan Stehlik, Adrian Cernescu, Zdenek Remes, Pavla Stenclova, Martin Muller und Bohuslav Rezek. „Nanodiamond surface chemistry controls assembly of polypyrrole and generation of photovoltage“. Scientific Reports 11, Nr. 1 (12.01.2021). http://dx.doi.org/10.1038/s41598-020-80438-3.

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AbstractNanoscale composite of detonation nanodiamond (DND) and polypyrrole (PPy) as a representative of organic light-harvesting polymers is explored for energy generation, using nanodiamond as an inorganic electron acceptor. We present a technology for the composite layer-by-layer synthesis that is suitable for solar cell fabrication. The formation, pronounced material interaction, and photovoltaic properties of DND-PPy composites are characterized down to nanoscale by atomic force microscopy, infrared spectroscopy, Kelvin probe, and electronic transport measurements. The data show that DNDs with different surface terminations (hydrogenated, oxidized, poly-functional) assemble PPy oligomers in different ways. This leads to composites with different optoelectronic properties. Tight material interaction results in significantly enhanced photovoltage and broadband (1–3.5 eV) optical absorption in DND/PPy composites compared to pristine materials. Combination of both oxygen and hydrogen functional groups on the nanodiamond surface appears to be the most favorable for the optoelectronic effects. Theoretical DFT calculations corroborate the experimental data. Test solar cells demonstrate the functionality of the concept.

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Petrakova, Vladimira, Andrew Taylor, Irena Kratochvilova, Frantisek Fendrych, Petr Cigler, Miroslav Ledvina, Jan Kucka et al. „On the mechanism of charge transfer between neutral and negatively charged nitrogen-vacancy color centers in diamond“. MRS Proceedings 1282 (2011). http://dx.doi.org/10.1557/opl.2011.450.

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ABSTRACTThe presented work aims for the development of optically-traceable intracellular nanodiamond sensors, where photoluminescence can be changed by biomolecular attachment/delivery event. High biocompatibility, small size and stable luminescence from its color centers, makes nanodiamond (ND) particles an attractive alternative to molecular dyes for drug-delivery and cell-imaging applications. In our work we study how the surface modification of ND can change ND luminescence spectra. This method can be used as a novel detection tool for remote monitoring of chemical processes in biological systems. We discuss photoluminescence (PL) spectra of oxidized and hydrogenated ND and a single crystal diamond, containing engineered NV centers. The hydrogenation of ND leads to quenching of NV- related luminescence and a PL shift due to changing of occupation from NV- to NV0 states. We model this effect using electrical potential changes at the diamond surface.

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Petráková, V. „Optical Detection of Charged Biomolecules: Towards Novel Drug Delivery Systems“. Acta Polytechnica 51, Nr. 5 (05.01.2011). http://dx.doi.org/10.14311/1450.

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This paper presents work done on developing optically-traceable intracellular nanodiamond sensors, where the photoluminescence can be changed by a biomolecular attachment/delivery event. Their high biocompatibility, small size and stable luminescence from their color centers make nanodiamond (ND) particles an attractive alternative to molecular dyes for drug-delivery and cell-imaging applications. In our work, we study how surface modification of ND can change the color of ND luminescence (PL). This method can be used as a novel detection tool for remote monitoring of chemical processes in biological systems. Recently, we showed that PL can be driven by atomic functionalization, leading to a change in the color of ND luminescence from red (oxidized ND) to orange (hydrogenated ND). In this work, we show how PL of ND changes similarly when interacting with positively and negatively charged molecules. The effect is demonstrated on fluorinated ND, where the high dipole moment of the C-F bond is favorable for the formation of non-covalent bonds with charged molecules. We model this effect using electrical potential changes at the diamond surface. The final aim of the work is to develop a “smart” optically traceable drug carrier, where the delivery event is optically detectable.

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