An efficient purification method for detonation nanodiamonds

Pichot, Vincent; Comet, Marc; Fousson, E.; Baras, Christian; Senger, A.; Normand, F. Le; Spitzer, Denis

doi:10.1016/j.diamond.2007.09.011

Cited by 147 publications

(107 citation statements)

References 9 publications

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“…31 Thermal oxidation process uses temperatures of 400°C-430°C to allow the oxidation of sp 2 -bonded carbon species in the air, with negligible alteration in sp 3 -bonded carbon structures. 33 These temperature requirements for the selective oxidation of sp 2 -bonded carbon species were confirmed by Pichot et al 32 The oxidation of NDs at a high temperature using air containing ozone is another approach that results in the removal of the majority of sp 2 -hybridized carbon structures. 34 The ozone-air treatment, also known as the "gas phase treatment," is ecological and efficient, as the purification of NDs is achieved without using the corrosive liquid oxidizers.…”

Section: Temperature T (°C)mentioning

confidence: 54%

“…32 The oxidization and subsequent removal of sp 2 -bonded carbon structures, present either in amorphous or graphitic forms, is achieved by the use of liquid oxidizers such as sodium peroxide, a chromium trioxide and sulfuric acid mixture, or a nitric acid and hydrogen peroxide mixture. 31 Thermal oxidation process uses temperatures of 400°C-430°C to allow the oxidation of sp 2 -bonded carbon species in the air, with negligible alteration in sp 3 -bonded carbon structures.…”

Section: Temperature T (°C)mentioning

confidence: 99%

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Nanodiamonds as novel nanomaterials for biomedical applications: drug delivery and imaging systems

Kaur¹,

Badea²

2013

IJN

103

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Detonation nanodiamonds (NDs) are emerging as delivery vehicles for small chemical drugs and macromolecular biotechnology products due to their primary particle size of 4 to 5 nm, stable inert core, reactive surface, and ability to form hydrogels. Nanoprobe technology capitalizes on the intrinsic fluorescence, high refractive index, and unique Raman signal of the NDs, rendering them attractive for in vitro and in vivo imaging applications. This review provides a brief introduction of the various types of NDs and describes the development of procedures that have led to stable single-digit-sized ND dispersions, a crucial feature for drug delivery systems and nanoprobes. Various approaches used for functionalizing the surface of NDs are highlighted, along with a discussion of their biocompatibility status. The utilization of NDs to provide sustained release and improve the dispersion of hydrophobic molecules, of which chemotherapeutic drugs are the most investigated, is described. The prospects of improving the intracellular delivery of nucleic acids by using NDs as a platform are exemplified. The photoluminescent and optical scattering properties of NDs, together with their applications in cellular labeling, are also reviewed. Considering the progress that has been made in understanding the properties of NDs, they can be envisioned as highly efficient drug delivery and imaging biomaterials for use in animals and humans.

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Section: Temperature T (°C)mentioning

confidence: 54%

Section: Temperature T (°C)mentioning

confidence: 99%

Nanodiamonds as novel nanomaterials for biomedical applications: drug delivery and imaging systems

Kaur¹,

Badea²

2013

IJN

103

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“…2C). The TGA thermogram of the as-received ND-OH particles indicates that they are stable up to 550 °C without any apparent mass loss [50] and [51]. TGA measurements indicate a weight loss of ≈ 7.45% above 95 °C mainly due to absorbed water [50].…”

Section: Fig 2 (A) Ftir Spectra Of Nd-oh (Black) and Nd-menthol (Rementioning

confidence: 98%

Antimicrobial activity of menthol modified nanodiamond particles

Turcheniuk

Raks

Issa

et al. 2015

Diamond and Related Materials

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Advances in nanotechnology have seen the development of several microbiocidal nanoparticles displaying activity against biofilms. These applications benefit from one or more combinations of the nanoparticle properties. Nanoparticles may indeed concentrate drugs on their surface resulting in polyvalent effects and improved efficacy to fight against bacteria. Nanodiamonds (NDs) are among the most promising new materials for biomedical applications. We elucidate in this paper the effect of menthol modified nanodiamond (ND-menthol) particles on bacterial viability against Grampositive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria. We show that while ND-menthol particles are non-toxic to both pathogens, they show significant antibiofilm activity. The presence of ND-menthol particles reduces biofilm formation more efficiently than free menthol, unmodified oxidized NDs and ampicillin, a commonly used antibiotic. Our findings might be thus a step forward towards the development of alternative non antibiotic based strategies targeting bacterial infections.

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“…This observed phenomenon could be explained by the fact that the absorbed water evaporates from the DND particles surface when the samples being heated up to 100 º C in air. 25,26 Impedance spectra of H-DND samples at 150˚C, 200˚C and 250˚C are shown in Fig. 3 (d) and (e).…”

Section: A Impedance Spectroscopymentioning

confidence: 99%

Hydrogen-terminated detonation nanodiamond: Impedance spectroscopy and thermal stability studies

Shi

Kundrát

et al. 2013

Journal of Applied Physics

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In this paper, we investigated the effect of hydrogen termination on the electrical properties and impedance spectra of detonation nanodiamond. The impedance spectra revealed that the hydrogen-termination process increases the electrical conductivity by four orders of magnitude at room temperature. An equivalent circuit has been proposed to correlate with the conduction mechanism. Arrhenius plot showed that there were two different activation energy levels located at 0.089 eV and 0.63 eV between 50 º C and 400 º C.The possible physical mechanism corresponding to these activation energy levels has been discussed. Hydrogen-terminated detonation nanodiamond has been further annealed at different temperatures prior to FTIR and XPS measurements in order to understand their thermal stability. The results demonstrated that the surface oxidization occurred between 100 º C and 150 º C. However, the C-H bonds could partially survive when the temperature reaches 400 º C in air.

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An efficient purification method for detonation nanodiamonds

Cited by 147 publications

References 9 publications

Nanodiamonds as novel nanomaterials for biomedical applications: drug delivery and imaging systems

Nanodiamonds as novel nanomaterials for biomedical applications: drug delivery and imaging systems

Antimicrobial activity of menthol modified nanodiamond particles

Hydrogen-terminated detonation nanodiamond: Impedance spectroscopy and thermal stability studies

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