Optical properties of functionalized nanodiamonds

Pichot, Vincent; Muller, Olivier; Sève, Aymeric; Yvon, A.; Merlat, Lionel; Spitzer, Denis

doi:10.1038/s41598-017-14553-z

Cited by 34 publications

(15 citation statements)

References 18 publications

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“…To add to that, the difference amongst the refractive indices of nanoparticles and PMMA matrix phases affect light refraction and reflection at the interface and the translucency thereafter 36) . It was found that the refractive index of ZrO2NPs (2.1750) 37) and DNPs (2.8610) 38) were higher than that of the PMMA (1.4813) 37) . Nanocomposite becomes more opaque if the difference between the refractive indices of the two phases is great (Figs.…”

Section: Discussionmentioning

confidence: 96%

Translucency of nanoparticle-reinforced PMMA denture base material: An <i>in-vitro</i> comparative study

et al. 2021

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The aim of this study was to assess the translucency of denture base acrylic resin reinforced with zirconium dioxide (ZrO2NPs), silicon dioxide (SiO2NPs), and diamond (DNPs) nanoparticles. A total of 130 heat-polymerized acrylic discs (15×2.5 mm) were fabricated conventionally and divided into control and experimental groups according to nanoparticle type and concentration (0.5, 1, 1.5, and 2.5 wt%). Unmodified acrylic resin specimens served as control. All specimens were thermocycled (5,000 cycles). Translucency was measured using a spectrophotometer. ANOVA and post-hoc Turkeys' test were used for data analysis at α=0.05. The translucency of modified PMMA was significantly lower than control (p<0.05) except 0.5% ZrO2NPs and SiO2NPs (p>0.05) which exhibited the highest translucency values among modified groups. As the NPs concentration increased, the translucency decreased and the lowest value was seen with 2.5% DNPs (1.18±0.10). The addition of ZrO2NPs, SiO2NPs, and DNPs into denture base resin decreased the translucency.

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Section: Discussionmentioning

confidence: 96%

Translucency of nanoparticle-reinforced PMMA denture base material: An <i>in-vitro</i> comparative study

et al. 2021

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“…[ 127 ] The nanodiamonds can be purified further by processing with concentrated HCl/HNO 3 acids. [ 162 ] Annealing in air at a temperature below 415°C has also been shown to selectively oxidize amorphous materials and metals, leaving behind the nanodiamond cores with surface functional groups related to oxygen. [ 163 ] Nanodiamonds have exhibited a wide range of advantageous physical properties including biocompatibility.…”

Section: Semiconductor Laser Coolingmentioning

confidence: 99%

Quantum Point Defects for Solid‐State Laser Refrigeration

et al. 2020

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Herein, the role that point defects have played over the last two decades in realizing solid‐state laser refrigeration is discussed. A brief introduction to the field of solid‐state laser refrigeration is given with an emphasis on the fundamental physical phenomena and quantized electronic transitions that have made solid‐state laser‐cooling possible. Lanthanide‐based point defects, such as trivalent ytterbium ions (Yb3+), have played a central role in the first demonstrations and subsequent development of advanced materials for solid‐state laser refrigeration. Significant discussion is devoted to the quantum mechanical description of optical transitions in lanthanide ions, and their influence on laser cooling. Transition‐metal point defects have been shown to generate substantial background absorption in ceramic materials, decreasing the overall efficiency of a particular laser refrigeration material. Other potential color centers based on fluoride vacancies with multiple potential charge states are also considered. In conclusion, novel materials for solid‐state laser refrigeration, including color centers in diamond that have recently been proposed to realize the solid‐state laser refrigeration of semiconducting materials, are discussed.

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“…DND aggregates (˜10–500 nm) consist of primary particles ˜4–5 nm in size, held together in a matrix of amorphous carbon 1,3,4 . Recent notable developments include observation of optical limitation effects in surface functionalized DNDs and the demonstration of energetic core‐shell composites 5‐8 . Although the potential applications of DNDs range from photonics 9 and quantum computing 10,11 to drug delivery, 12,13 they are highly size‐dependent 2 .…”

Section: Introductionmentioning

confidence: 99%

Fresh insights into detonation nanodiamond aggregation: An X‐ray photoelectron spectroscopy, thermogravimetric analysis, and nuclear magnetic resonance study

Katsiev

Solovyeva

Mahfouz

et al. 2021

Engineering Reports

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Detonation nanodiamonds (DNDs) are known to be produced in aggregated clusters of a few nanometer‐sized primary crystalline particles embedded in an amorphous carbon matrix exhibiting high degree of polydispersity. A commonly accepted mechanism behind DND aggregation is the bridging of primary particles via oxygen containing functionalities. Here, we provide definitive spectroscopic evidence in favor of this working mechanism by carrying out systematic chemical compositional analysis on monodispersed DND aggregates of various sizes. Oxygen content is found to increase proportionally with the aggregate size confirming the role of oxygen containing functionalities as a cross‐linker. Solid‐state nuclear magnetic resonance data confirms these linkers to be of ether (COC) nature. Our results imply that oxygen content in DNDs can be independently tuned by varying the aggregate size, a knowledge which might benefit other applications, in addition. Next, we use this understanding to engineer the DND surfaces via an acid hydrolysis step to strip off these oxygen functionalities leading to size reduction of ca. 150 nm as‐received DND aggregates to ca. 40 nm with >90% yields, without resorting to any other pre‐ or post‐hydrolysis treatment such as surface functionalization or milling.

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Optical properties of functionalized nanodiamonds

Cited by 34 publications

References 18 publications

Translucency of nanoparticle-reinforced PMMA denture base material: An <i>in-vitro</i> comparative study

Translucency of nanoparticle-reinforced PMMA denture base material: An <i>in-vitro</i> comparative study

Quantum Point Defects for Solid‐State Laser Refrigeration

Fresh insights into detonation nanodiamond aggregation: An X‐ray photoelectron spectroscopy, thermogravimetric analysis, and nuclear magnetic resonance study

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