Ultrasonic Treatment of Acid-Washed Diamond Powder Surface

Visbal, Heidy; Ishizaki, Chanel; Ishizaki, Kōzō

doi:10.2109/jcersj.112.95

Cited by 5 publications

(8 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7 It was proved by X-ray analysis that the intrinsic crystal structure of the diamond was not changed at all (spectrum not shown here) in this modification procedure. The EDX analysis of the surface of ED showed an increase in the oxygen content from 0.56 to 9.61 atomic% (data not shown here), indicating that oxygen containing functional groups were introduced on the surfaces of diamond particles.…”

Section: Modification Of Diamond Surfacementioning

confidence: 64%

“…In this method, although the reaction condition is mild, the starting hydrogenated diamond powder is prepared by treating the oxidized diamond powder in a H 2 environment at 800-900 C. 6 A severe reaction condition is still needed. Visbal et al 7 introduced ether and carbonyl groups on the diamond surface after ultrasonic treating of the acid-washed diamond surface in water under bubbling gas (oxygen or argon) at 40 C. The last modification condition noted above is mild and suitable for laboratory or industrial use.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coating films prepared by photoreactions of the surface‐modified diamond powder and PET film with a binder agent

Hsu

Lin

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:The surface-modified diamond and PET film underwent photopolymerization rapidly with a binder agent to afford coating films of interpenetrating network (IPN) structure. The coating films thus formed exhibit higher tensile strength, thermal stability, and adhesion strength to the PET film. The inert surfaces of pristine diamond (PD) and PET film were modified by different chemicals and procedures to introduce epoxide and methacryloyl groups, respectively, on their surfaces. A coating agent consisting of an epoxide group containing modified diamond (called ED), a binder agent, and photoinitiators was prepared. After applying the coating agent to the substrate (a glass plate or a methacryloyl group containing PET film, MMA-PET) and degassing under reduced pressure, the thin film of the coating agent was exposed to UV light (k max ; 365 nm) at room temperature to yield a coating film of IPN-structure. The tensile strength and thermal properties of the ED-containing free coating film (called free film) increased with the amount of ED embedded, whereas the strength of the PD-containing free film decreased with the amount of PD embedded. The adhesion strength of the coating film on the MMA-PET improved significantly by the free radical polymerization of the methacryloyl groups on the MMA-PET and the acrylate resin in the binder agent. The surface photoreactions of ED and MMA-PET with the binder agent were confirmed by modeling.

show abstract

Section: Modification Of Diamond Surfacementioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Coating films prepared by photoreactions of the surface‐modified diamond powder and PET film with a binder agent

Hsu

Lin

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…DRIFT of diamond particles shows a series of substrate peaks that overlap with the C−D stretches, making this region (1600−2600 cm −1 ) of the spectrum of questionable value for this analysis. XPS was not useful for identification of H (or D), as it is not sensitive to hydrogen.…”

Section: Resultsmentioning

confidence: 99%

“…[12][13][14][15][16][17] modification of diamond (100) by Diels-Alder chemistry. 18,19 In addition, plasma modification of diamond surfaces, 20,21 ultrasonic treatment of acid-washed diamond particles (in this work, the authors demonstrate diffuse reflectance Fourier transform infrared spectroscopy (DRIFT) of 5-12 μm diamond particles), 22 and electrochemical methods, 23 such as electrochemical reduction of diazonium salts and Suzuki coupling with acryl organics, 24,25 have been reported.…”

Section: Introductionmentioning

confidence: 86%

“…Hydrogen- and deuterium-terminated diamond surfaces can be prepared thermally , and by plasma treatment. − Hydrogen-terminated diamond surfaces have also been modified via UV light. For example, hydrogen-terminated diamond can be covalently modified with molecules bearing a terminal vinyl (CC) group via a photochemical process using sub-band gap light at 254 nm, and other photochemical terminations at varying energies are also known. − Liquid phase functionalizations include the modification of diamond (100) by Diels−Alder chemistry. , In addition, plasma modification of diamond surfaces, , ultrasonic treatment of acid-washed diamond particles (in this work, the authors demonstrate diffuse reflectance Fourier transform infrared spectroscopy (DRIFT) of 5−12 μm diamond particles), and electrochemical methods, such as electrochemical reduction of diazonium salts and Suzuki coupling with acryl organics, , have been reported.…”

Section: Introductionmentioning

confidence: 92%

See 1 more Smart Citation

Functionalization of Deuterium- and Hydrogen-Terminated Diamond Particles with Mono- and Multilayers using Di-tert-Amyl Peroxide and Their Use in Solid Phase Extraction

Vail

Dadson

et al. 2009

Chem. Mater.

View full text Add to dashboard Cite

In spite of an earlier report to the contrary and a different attempt that appears to have been unsuccessful, here we show an improved method that allows functionalization of hydrogen- and deuterium-terminated diamond with a dialkyl peroxide. In particular, hydrogen-/deuterium-terminated diamond particles were treated with neat di-tert-amyl peroxide (DTAP, C2H5C(CH3)2OOC(CH3)2C2H5) at elevated temperature. Surface changes were followed by X-ray photoelectron spectroscopy (XPS), diffuse reflectance Fourier transform infrared spectroscopy (DRIFT), and time-of-flight secondary ion mass spectroscopy (ToF-SIMS). After these reactions, the oxygen signal in the XPS spectra increased, the deuterium peak in the negative ToF-SIMS spectra decreased, and DRIFT showed C−H stretches, which were not previously present and which were similar to those of the precursor. In the C−H stretching region, the IR spectrum of adsorbed di-tert-amyl peroxide shows features that are red-shifted with respect to the IR spectrum of the precursor molecule. These trends are supported by density functional theory (DFT) calculations. These data are consistent with the chemisorption of fragments of di-tert-amyl peroxide primarily through ether linkages. The threshold for this reaction was determined by DRIFT to be ca. 95 °C. Multilayers of DTAP could be prepared by repeated exposure of the substrate to this reagent. Functionalized diamond particles were used in solid phase extraction.

show abstract

Creation of high density ensembles of nitrogen-vacancy centers in nitrogen-rich type Ib nanodiamonds

Su¹,

Fang²,

Chang³

et al. 2013

Nanotechnology

101

View full text Add to dashboard Cite

This work explores the possibility of increasing the density of negatively charged nitrogen-vacancy centers ([NV(-)]) in nanodiamonds using nitrogen-rich type Ib diamond powders as the starting material. The nanodiamonds (10-100 nm in diameter) were prepared by ball milling of microdiamonds, in which the density of neutral and atomically dispersed nitrogen atoms ([N(0)]) was measured by diffuse reflectance infrared Fourier transform spectroscopy. A systematic measurement of the fluorescence intensities and lifetimes of the crushed monocrystalline diamonds as a function of [N(0)] indicated that [NV(-)] increases nearly linearly with [N(0)] at 100-200 ppm. The trend, however, failed to continue for nanodiamonds with higher [N(0)] (up to 390 ppm) but poorer crystallinity. We attribute the result to a combined effect of fluorescence quenching as well as the lower conversion efficiency of vacancies to NV(-) due to the presence of more impurities and defects in these as-grown diamond crystallites. The principles and practice of fabricating brighter and smaller fluorescent nanodiamonds are discussed.

show abstract

Ultrasonic Treatment of Acid-Washed Diamond Powder Surface

Cited by 5 publications

References 16 publications

Coating films prepared by photoreactions of the surface‐modified diamond powder and PET film with a binder agent

Coating films prepared by photoreactions of the surface‐modified diamond powder and PET film with a binder agent

Functionalization of Deuterium- and Hydrogen-Terminated Diamond Particles with Mono- and Multilayers using Di-tert-Amyl Peroxide and Their Use in Solid Phase Extraction

Creation of high density ensembles of nitrogen-vacancy centers in nitrogen-rich type Ib nanodiamonds

Contact Info

Product

Resources

About