Nanodiamond: A high impact nanomaterial

Nunn, Nicholas; Torelli, Marco D.; McGuire, G. E.; Shenderova, Olga

doi:10.1016/j.cossms.2016.06.008

Cited by 171 publications

(86 citation statements)

References 74 publications

(98 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Finding nanoparticles of biologically-relevant size that combine long T 1 with the ability to create high 13 C polarization has proven to be challenging. With the correct balance of paramagnetic defects to fuel DNP without overly accelerating relaxation, hyperpolarized nanodiamond holds the promise of a biocompatible [22,23] MRI imaging agent possessing the advantages over silicon of optical trackability [24][25][26][27] and a readily-functionalized, non-oxidizing surface [28,29]. Although previous works have investigated 29 Si defects and DNP [30], as well as nitrogen-vacancy defects in diamonds, including recent work hyperpolarizing diamond powders via optical methods [31,32], little has been done to investigate the optimum defect concentration for nanodiamond DNP.…”

Section: Introductionmentioning

confidence: 99%

Tailored nanodiamonds for hyperpolarized C13 MRI

et al. 2020

View full text Add to dashboard Cite

Nanodiamond is poised to become an attractive material for hyperpolarized 13 C MRI if large nuclear polarizations can be achieved without the accompanying rapid spin-relaxation driven by paramagnetic species. Here we report enhanced and long-lived 13 C polarization in synthetic nanodiamonds tailored by acid-cleaning and air-oxidation protocols. Our results separate the contributions of different paramagnetic species on the polarization behavior, identifying the importance of substitutional nitrogen defect centers in the nanodiamond core. These results are likely of use in the development of nanodiamond-based imaging agents with size distributions of relevance for examining biological processes. arXiv:1909.04842v1 [cond-mat.mes-hall]

show abstract

Section: Introductionmentioning

confidence: 99%

Tailored nanodiamonds for hyperpolarized C13 MRI

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In recent years, diamond nanoparticles or nanodiamonds (NDs) have attracted much attention of researchers due to their unique structural, chemical, biological, mechanical, and optical properties. 1,2,3,4,5,6 Owing to these exotic characteristics, NDs are potential candidate in many engineering applications related to nano-and bio-technology. 2,5,6,7,8,9,10 Especially, fluorescence (FL) characteristics of NDs that originate from optical color centers, impurities and point defects have emerged as the current field of intense research for their ability as a single photon emitter in quantum information technology.…”

Section: Introductionmentioning

confidence: 99%

“…2,5,6,7,8,9,10 Especially, fluorescence (FL) characteristics of NDs that originate from optical color centers, impurities and point defects have emerged as the current field of intense research for their ability as a single photon emitter in quantum information technology. [1][2][3][4][5][6][7][8][9][10] Among various color centers in diamond, the N-vacancy (NV) color center is the most popular due to its excellent optical characteristics and hence is explored extensively.…”

Section: Introductionmentioning

confidence: 99%

Si and N - Vacancy color centers in discrete diamond nanoparticles: Raman and fluorescence spectroscopic studies

Ganesan

Ajikumar

Ilango

et al. 2019

Diamond and Related Materials

View full text Add to dashboard Cite

The present study reports on an innovative method to prepare discrete diamond nanoparticles or nanodiamonds (NDs) with high structural and optical quality through top-down approach by controlled oxidation of pre-synthesized nanocrystalline diamond (NCD) film. These NDs are studied for their structural and optical properties using atomic force microscopy (AFM), Raman and fluorescence (FL) spectroscopy. While AFM analysis confirms uniform distribution of discrete NDs with different sizes varying from a few tens of nanometers to about a micron, spectroscopic investigations reveal the presence of impurity -vacancy related color centers exhibiting FL at 637 and 738 nm as a function of particle size. In addition, an intense emission originating from vacancy centers associated with N and Si (SiVˉ) is observed for all NDs at the temperature close to liquid nitrogen. A detailed spectral analysis is carried out on the structural defects in these NDs. The full width at half maximum of diamond Raman band ( ~ 1332 cm -1 ) is found to be as narrow as 1.5 cm -1 which reveals the superior structural quality of these NDs.Further, mapping of diamond Raman and FL spectra of SiVˉ confirm the uniform distribution of NDs throughout the substrate. The narrow line widths and a minimal shift in peak positions of Raman and FL spectra endorse this aspect.

show abstract

“…Pure and doped diamond nanoparticles, because of its extraordinary mechanical performance, chemical resistance, adaptable surface chemistry, and biocompatibility, are considered an exceptional material for novel nanoscience and nanotechnology‐based applications . The increasing accessibility of high quality CVD films and HPHT crystalline diamonds, in a diversity of morphologies and sizes, from microcrystalline (MCD), nanocrystalline (NCD), and ultra nanocrystalline (UNCD), has motivated the investigation on the thermally and optically stimulated luminescence phenomena on these types of diamonds exposed to ionizing radiation.…”

Section: Introductionmentioning

confidence: 99%

Raman and Thermoluminescence Studies of HPHT Synthetic Nanodiamond Powders

Ruiz-Valdez

Chernov

Meléndrez

et al. 2018

Physica Status Solidi (a)

View full text Add to dashboard Cite

Nanocrystalline diamond has received increasing attention because of its unique perspectives in biomedical applications. In this work, Raman and thermoluminescence (TL) properties of commercial synthetic high pressure–high temperature (HPHT) nanodiamond powders with mean size of 60, 140, 380, and 660 nm purchased from PlasmaChem GmbH, Germany are presented. The Raman spectra exhibit a diamond peak related to the CC sp3 chemical bond and a number of additional bands that could be assigned to G‐band, OH and CO groups and some intrinsic point defects. The position of the diamond peak does not depend on nanoparticle size when it is monitored with low power laser. The use of a laser with increased power leads to uncontrolled heating of the nanopowders that is manifested as a broadening and down‐shifting of the 1332 cm−1 line. After exposure to beta radiation, all the powders exhibit a main broad TL peak with maxima between 320 and 380 °C and a weaker low temperature TL. The dose response is linear at the doses of less than 10 Gy for all the powders. At higher doses a supralinear behavior is observed.

show abstract

Nanodiamond: A high impact nanomaterial

Cited by 171 publications

References 74 publications

Tailored nanodiamonds for hyperpolarized C13 MRI

Tailored nanodiamonds for hyperpolarized C13 MRI

Si and N - Vacancy color centers in discrete diamond nanoparticles: Raman and fluorescence spectroscopic studies

Raman and Thermoluminescence Studies of HPHT Synthetic Nanodiamond Powders

Contact Info

Product

Resources

About