Simple Fabrication of Gd(III)-DTPA-Nanodiamond Particles by Chemical Modification for Use as Magnetic Resonance Imaging (MRI) Contrast Agent

Nakamura, Takako; Ohana, Tsuguyori; Yabuno, Hajime; Kasai, Rumiko; Suzuki, Tetsuya; Hasebe, Terumitsu

doi:10.7567/apex.6.015001

Cited by 27 publications

(15 citation statements)

References 17 publications

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“…The FTIR spectra have a broad band centered at 3402 cm −1 for both samples, which is the characteristic peak of the O—H bond (Figure S10a, Supporting Information) . The absorption peaks at around 2927, 1636, and 1398 cm −1 belong to C—H, C═O, and C—O stretching vibration in the DTPA, respectively (Figure S10b–d, Supporting Information) . For the SnO 2 sample, the characteristic peaks at 626 and 549 cm −1 are due to the O‐Sn‐O and Sn‐O stretching mode, respectively.…”

Section: Resultsmentioning

confidence: 96%

Regulation of Interfacial Charge Transfer and Recombination for Efficient Planar Perovskite Solar Cells

et al. 2019

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Control of dynamics at the electron transport layer–perovskite interface, such as charge transfer and recombination, is essential in achieving high‐efficiency planar perovskite solar cells (PSCs). Herein, it was observed that the trade‐off between unfavorable electron transport of a thick SnO2 film and serious electron recombination at thin SnO2 film/perovskite interfaces is essential for the performance of SnO2‐based planar PSCs. The optimized efficiency of devices beyond 20% is obtained by using a two‐step deposition of SnO2. Moreover, trap‐assisted carrier recombination is significantly suppressed by using the diethylenetriaminepentaacetic acid passivator via the formation of coordination with undercoordinated Sn and Pb2+ ions. As a result, the champion device demonstrates a promising efficiency of 21.28% with negligible hysteresis and much improved environmental stability, i.e., retaining 98% of the initial efficiency under ambient atmosphere over 1000 h.

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Section: Resultsmentioning

confidence: 96%

Regulation of Interfacial Charge Transfer and Recombination for Efficient Planar Perovskite Solar Cells

et al. 2019

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“…The combination of longer-wavelength and higherorder nonlinear excitation of NDs may offer a possible solution 55 and the MRI linked with NDs is another attractive alternative. 72,73 Successfully addressing these challenging issues will accelerate the rate of innovation of this novel nanomaterial and related technologies for brain imaging 74 and even whole body imaging. 75 …”

Section: Resultsmentioning

confidence: 99%

Recent Developments and Applications of Nanodiamonds as Versatile Bioimaging Agents

Hui

Chang

2013

J Chinese Chemical Soc

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The first demonstration of nanodiamonds (NDs) for cellular fluorescence imaging was reported in 2005. It has since then aroused considerable interest among scientists working in the field of diamond and related materials. A large number of researches have been conducted, aimed to develop this novel nanomaterial as diagnostic, imaging, and therapeutic agents in biomedicine. There have been more than 20 review articles and book chapters published on this topic in the past 8 years. With the recent development of nanotechnologies and photonics, the ND-based bioimaging has been taken to a new level. In this topic review, we will focus our attention on the recent advances in the development of NDs as versatile bioimaging agents for both in vitro and in vivo applications. Emerging new technologies including multiphoton excitation imaging, superresolution imaging, optically detected magnetic resonance imaging, cathodoluminescence imaging, and photoacoustic imaging are discussed. Keywords

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“…Currently-known centers are nitrogen-vacancy, silicon-vacancy color centers [4,5] and impurity of Eu ions in diamond lattice [6,7]. Gadolinium atoms are particularly attractive as a dopant in diamond lattice due to their potential use in nuclear magnetic resonance tomography [8].…”

Section: Introductionmentioning

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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Simple Fabrication of Gd(III)-DTPA-Nanodiamond Particles by Chemical Modification for Use as Magnetic Resonance Imaging (MRI) Contrast Agent

Cited by 27 publications

References 17 publications

Regulation of Interfacial Charge Transfer and Recombination for Efficient Planar Perovskite Solar Cells

Regulation of Interfacial Charge Transfer and Recombination for Efficient Planar Perovskite Solar Cells

Recent Developments and Applications of Nanodiamonds as Versatile Bioimaging Agents

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

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