Magnetic Resonance Study of Gadolinium-Grafted Nanodiamonds

Panich, A. M.; Shames, Alexander I.; Sergeev, N. A.; Osipov, V. Yu.; Alexenskiy, Alexander E.; Vul, A. Ya.

doi:10.1021/acs.jpcc.6b05403

Cited by 32 publications

(53 citation statements)

References 33 publications

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“…lie within the slip boundary , . It is noteworthy that the distance between nanodiamond surface and Gd 3+ ion is calculated to be 3.2 Å from nuclear relaxation data , …”

Section: Resultsmentioning

confidence: 99%

“…Third, conductometric titration followed by ζ ‐potential measurements may be used as methods for N Ln determination. It is noteworthy that the possible bonding between Gd 3+ and carboxylate anions of 4–5 nm DND‐COOH was firstly discussed in …”

Section: Resultsmentioning

confidence: 99%

“…[35,36] It is noteworthy that the distance between nanodiamond surface and Gd 3+ ion is calculated to be 3.2 Å from nuclear relaxation data. [37,38] Thus, the interaction of Ln 3+ ions with carboxylate groups of DND-COOH is observed in the range -70 mV < < 0 mV. There is the region of an exchange reaction between the protons of the carboxyl groups and the Ln 3+ ions.…”

Section: Synthesis and Characterization Of Modified Nanodiamonds Dnd-mentioning

confidence: 96%

“…It is noteworthy that the possible bonding between Gd 3+ and carboxylate anions of 4-5 nm DND-COOH was firstly discussed in. [37][38][39] Hence, the Ln 3+ binding to carboxyl groups of nanodiamond surface plays the key role in formation of DND-COO-{Ln} (Ln = Ce, Pr, Sm, Eu, Gd, Dy, Ho, Tm).…”

Section: Dnd-coo-{ln} (1)mentioning

confidence: 99%

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Interaction of Carboxyl Groups with Rare Metal Ions on the Surface of Detonation Nanodiamonds

et al. 2019

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This paper reports on the grafting of rare-earth metal ions onto particles of 4-5 nm carboxylated detonation nanodiamond (DND-COOH). Aqueous solutions of acetates and nitrates (Ln(OOCCH 3 ) 3 ·4H 2 O or Ln(NO 3 ) 3 ·6H 2 O, Ln = Eu, Gd) were used for the grafting. The ion exchange reaction between rare metal ions and protons of surface carboxyl groups was first detected by conductometry and electrokinetic potential measurements. The equivalence point corresponds to the bond be- [a]

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“…lie within the slip boundary , . It is noteworthy that the distance between nanodiamond surface and Gd 3+ ion is calculated to be 3.2 Å from nuclear relaxation data , …”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Synthesis and Characterization Of Modified Nanodiamonds Dnd-mentioning

confidence: 96%

Section: Dnd-coo-{ln} (1)mentioning

confidence: 99%

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Interaction of Carboxyl Groups with Rare Metal Ions on the Surface of Detonation Nanodiamonds

et al. 2019

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“…The initial DND, with size of 4 -5 nm, were purified and de-agglomerated in accordance with a procedure described in [9,10]. Surface modification of DND with 3d-4f elements (Eu, Gd) was carried out using ionic exchange in accordance to the procedure described in [13,14].…”

Section: Samplesmentioning

confidence: 99%

Photo- and cathodoluminescence spectra of diamond single crystals formed by sintering of detonation nanodiamonds

Кидалов¹,

Zamoryanskaya²,

Kravez³

et al. 2019

Nanosystems: Phys. Chem. Math.

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The photo-and cathodoluminescence spectra (PL, CL) of diamond single crystals synthesized under high-pressure and at high-temperature (HPHT sintering) from detonation nanodiamonds (DND) particles with Gd and Eu ion-functionalized surfaces have been studied. The HPHT sintering was made under pressures (P ∼ = 7 GPa) and temperature (T = 1300-1500 • C). The DND particles have sizes of 4-5 nm, hydrocarbons and/or alcohols were used at the HPHT synthesis instead of traditional metal catalysts. The initial and synthesized crystals were characterized by X-ray microanalysis, mass-spectroscopy, scanning electron microscopy (SEM), PL and CL. Mass spectra confirmed that Gd and Eu atoms were inserted into the volume of diamond single crystals in the HPHT sintering. A significant conversion of the PL and CL spectra of synthesized diamond single crystals compared with HPHT diamond crystals were observed. Transformation of the point defect assemblies inherent to the diamond crystal can explain the observed spectra.

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Incorporation of Gadolinium Oxide and Gadolinium Oxysulfide Microspheres: MRI/CT Monitoring and Promotion of Osteogenic/Chondrogenic Differentiation for Bone Implants

Huang

Tang²,

Guo

et al. 2020

ChemNanoMat

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The current biodegradable polymer materials, as orthopedic implants, can not be traced timely by using the existing medical imaging techniques due to low density and lack of relaxed hydrogen proton ability. Considering the paramagnetism of gadolinium and the particularity of micro/ nano materials, we synthesized inorganic gadolinium oxide and gadolinium oxysulfide microspheres with regular morphology and uniform size without doped rare earth. After incorporation into biodegradable polymer of poly(lactic-coglycolic acid), their effects on signals of MRI, CT and osteogenic/chondrogenic differentiation were investigated to acquisition of multifunctional micro/nano composites for bone implants. At the studied concentrations, gadolinium oxide microspheres showed higher signal than gadolinium oxysulfide microspheres on T 1-weighted imaging. Both of them were of fine biocompatibility and did not show their negative effect on adhesion and proliferation in the concentration of 0.4% (w/w, Gd/PLGA). Meanwhile, the osteogenic/ chondrogenic differentiation of MC3T3-E1 preosteoblasts, including ALP activity, calcium deposition and expression of Runx2, OPN, OCN, COL I and COL II in mRNA and protain, were stimulated at different level, which indicated that moderate use the inorganic gadolinium oxide and gadolinium oxysulfide microspheres could realize the function of tracing the polymer bone implants by MRI/CT and inducing the osteogenic/chondrogenic differentiation simultaneously.

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Magnetic Resonance Study of Gadolinium-Grafted Nanodiamonds

Cited by 32 publications

References 33 publications

Interaction of Carboxyl Groups with Rare Metal Ions on the Surface of Detonation Nanodiamonds

Interaction of Carboxyl Groups with Rare Metal Ions on the Surface of Detonation Nanodiamonds

Photo- and cathodoluminescence spectra of diamond single crystals formed by sintering of detonation nanodiamonds

Incorporation of Gadolinium Oxide and Gadolinium Oxysulfide Microspheres: MRI/CT Monitoring and Promotion of Osteogenic/Chondrogenic Differentiation for Bone Implants

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