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Nanodiamond

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https://www.readbyqxmd.com/read/28914470/selective-electrochemical-reduction-of-co2-to-ethanol-on-b-and-n-codoped-nanodiamond
#1
Yanming Liu, Yujing Zhang, Kai Chen, Xie Quan, Xinfei Fan, Yan Su, Shuo Chen, Huimin Zhao, Yaobin Zhang, Hongtao Yu, Michael R Hoffmann
Electrochemical reduction of CO2 to ethanol, a clean and renewable liquid fuel with high heating value, is an attractive strategy for global warming mitigation and resource utilization. However, converting CO2 to ethanol remains great challenge due to the low activity, poor product selectivity and stability of electrocatalysts. Here, B and N codoped nanodiamond (BND) was reported as an efficient and stable electrode for selective reduction of CO2 to ethanol. Good ethanol selectivity was achieved on BND with high Faradaic efficiency of 93...
September 15, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28885773/far-uv-excited-luminescence-of-nitrogen-vacancy-centers-evidence-for-diamonds-in-space
#2
Huan-Cheng Chang, Hsiao-Chi Lu, Yu-Chain Peng, Sheng-Lung Chou, Jen-Iu Lo, Bing-Ming Cheng
The nitrogen-vacancy (NV) centers in diamond are among the most thoroughly investigated defects in the solid state of matter; however, our understanding of their properties upon far-UV excitation of the host matrix is limited. The knowledge is crucial for the identification of NV as the carrier of extended red emission (ERE) bands detected in a wide range of astrophysical environments. Here, we report a study on the photoluminescence spectra of NV-containing nanodiamonds excited with synchrotron radiation over the wavelength range of 125 - 350 nm...
September 8, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28885759/host-guest-complexes-of-cyclodextrins-and-nanodiamonds-as-strong-non-covalent-binding-motif-for-self-assembled-nanomaterials
#3
Frauke Schibilla, Jens Voskuhl, Natalie Fokina, Jeremy Dahl, Peter R Schreiner, Bart Jan Ravoo
We report on the inclusion of carboxy- and amine-substituted molecular nanodiamonds (NDs) adamantane, diamantane and triamantane by β- and γ-cyclodextrin (β-CD and γ-CD) with particularly suited hydrophobicity and symmetry for an optimal fit of host and guest. We studied the host-guest interactions in detail and generally observed 1:1 association of the NDs with the larger γ-CD cavity but 1:2 association for the largest ND in the series (triamantane) with β-CD. We found higher binding affinities of carboxy-substituted NDs compared to amine-substituted NDs...
September 8, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28875995/anti-inflammatory-effects-of-octadecylamine-functionalized-nanodiamond-on-primary-human-macrophages
#4
A E Pentecost, C E Witherel, Y Gogotsi, K L Spiller
Chronic inflammatory disorders such as rheumatoid arthritis are characterized by excessive pro-inflammatory or "M1" activation of macrophages, the primary cells of the innate immune system. Current treatments include delivery of glucocorticoids (e.g. dexamethasone - Dex), which reduce pro-inflammatory M1 behaviour in macrophages. However, these treatments have many off-target effects on cells other than macrophages, resulting in broad immunosuppression. To limit such side effects, drug-incorporated nano- and microparticles may be used to selectively target macrophages via phagocytosis, because of their roles as highly effective phagocytes in the body...
September 6, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28875102/uptake-and-intracellular-accumulation-of-diamond-nanoparticles-a-metabolic-and-cytotoxic-study
#5
Antonín Brož, Lucie Bačáková, Pavla Štenclová, Alexander Kromka, Štěpán Potocký
Diamond nanoparticles, known as nanodiamonds (NDs), possess several medically significant properties. Having a tailorable and easily accessible surface gives them great potential for use in sensing and imaging applications and as a component of cell growth scaffolds. In this work we investigate in vitro interactions of human osteoblast-like SAOS-2 cells with four different groups of NDs, namely high-pressure high-temperature (HPHT) NDs (diameter 18-210 nm, oxygen-terminated), photoluminescent HPHT NDs (diameter 40 nm, oxygen-terminated), detonation NDs (diameter 5 nm, H-terminated), and the same detonation NDs further oxidized by annealing at 450 °C...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28853284/polyamidoamine-decorated-nanodiamonds-as-a-hybrid-gene-delivery-vector-and-sirna-structural-characterization-at-the-charged-interfaces
#6
Dae Gon Lim, Nirmal Rajasekaran, Dukhee Lee, Nam Ah Kim, Hun Soon Jung, Sungyoul Hong, Young Kee Shin, Eunah Kang, Seong Hoon Jeong
Nanodiamonds have been discovered as a new exogenous material source in biomedical applications. As a new potent form of nanodiamond (ND), polyamidoamine-decorated nanodiamonds (PAMAM-NDs) were prepared for E7 or E6 oncoprotein-suppressing siRNA gene delivery for high risk human papillomavirus-induced cervical cancer, such as types 16 and 18. It is critical to understand the physicochemical properties of siRNA complexes immobilized on cationic solid ND surfaces in the aspect of biomolecular structural and conformational changes, as the new inert carbon material can be extended into the application of a gene delivery vector...
September 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28852020/co-delivery-of-paclitaxel-and-cetuximab-by-nanodiamond-enhances-mitotic-catastrophe-and-tumor-inhibition
#7
Yu-Wei Lin, Emmanuel Naveen Raj, Wei-Siang Liao, Johnson Lin, Kuang-Kai Liu, Ting-Hua Chen, Hsiao-Chun Cheng, Chi-Ching Wang, Lily Yi Li, Chinpiao Chen, Jui-I Chao
The poor intracellular uptake and non-specific binding of anticancer drugs into cancer cells are the bottlenecks in cancer therapy. Nanocarrier platforms provide the opportunities to improve the drug efficacy. Here we show a carbon-based nanomaterial nanodiamond (ND) that carried paclitaxel (PTX), a microtubule inhibitor, and cetuximab (Cet), a specific monoclonal antibody against epidermal growth factor receptor (EGFR), inducing mitotic catastrophe and tumor inhibition in human colorectal cancer (CRC). ND-PTX blocked the mitotic progression, chromosomal separation, and induced apoptosis in the CRC cells; however, NDs did not induce these effects...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28839134/nanodiamonds-suppress-the-growth-of-lithium-dendrites
#8
Xin-Bing Cheng, Meng-Qiang Zhao, Chi Chen, Amanda Pentecost, Kathleen Maleski, Tyler Mathis, Xue-Qiang Zhang, Qiang Zhang, Jianjun Jiang, Yury Gogotsi
Lithium metal has been regarded as the future anode material for high-energy-density rechargeable batteries due to its favorable combination of negative electrochemical potential and high theoretical capacity. However, uncontrolled lithium deposition during lithium plating/stripping results in low Coulombic efficiency and severe safety hazards. Herein, we report that nanodiamonds work as an electrolyte additive to co-deposit with lithium ions and produce dendrite-free lithium deposits. First-principles calculations indicate that lithium prefers to adsorb onto nanodiamond surfaces with a low diffusion energy barrier, leading to uniformly deposited lithium arrays...
August 25, 2017: Nature Communications
https://www.readbyqxmd.com/read/28835622/nanodiamond-arrays-on-glass-for-quantification-and-fluorescence-characterisation
#9
Ashleigh H Heffernan, Andrew D Greentree, Brant C Gibson
Quantifying the variation in emission properties of fluorescent nanodiamonds is important for developing their wide-ranging applicability. Directed self-assembly techniques show promise for positioning nanodiamonds precisely enabling such quantification. Here we show an approach for depositing nanodiamonds in pre-determined arrays which are used to gather statistical information about fluorescent lifetimes. The arrays were created via a layer of photoresist patterned with grids of apertures using electron beam lithography and then drop-cast with nanodiamonds...
August 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28820208/positive-zeta-potential-of-nanodiamonds
#10
Laia Ginés, Soumen Mandal, Ashek-I-Ahmed, Chia-Liang Cheng, Maabur Sow, Oliver A Williams
In this paper, the origin of positive zeta potential exhibited by nanodiamond particles is explained. Positive zeta potentials in nano-structured carbons can be explained by the presence of graphitic planes at the surface, which leave oxygen-free Lewis sites and so promotes the suppression of acidic functional groups. Electron Microscopy and Raman Spectroscopy have been used to show that positive zeta potential of nanodiamond is only exhibited in the presence of sp(2) carbon at the surface.
August 31, 2017: Nanoscale
https://www.readbyqxmd.com/read/28819241/platinum-nanoparticle-embedded-porous-diamond-spherical-particles-as-an-active-and-stable-heterogeneous-catalyst
#11
Takeshi Kondo, Takuji Morimura, Tatsumi Tsujimoto, Tatsuo Aikawa, Makoto Yuasa
Platinum nanoparticle-embedded porous diamond spherical particles (PtNP@PDSPs), as an active and stable catalyst, were fabricated by spray-drying of an aqueous slurry containing nanodiamond (ND) particles, platinum nanoparticles (PtNP), and polyethylene glycol (PEG) to form ND/PtNP/PEG composite spherical particles, followed by removal of PEG and a short-time diamond growth on the surface. The average diameter of the PtNP@PDSPs can be controlled in the range of 1-5 μm according to the spray-drying conditions...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28808036/reducing-posttreatment-relapse-in-cleft-lip-palatal-expansion-using-an-injectable-estrogen-nanodiamond-hydrogel
#12
Christine Hong, Dayoung Song, Dong-Keun Lee, Lawrence Lin, Hsin Chuan Pan, Deborah Lee, Peng Deng, Zhenqing Liu, Danny Hadaya, Hye-Lim Lee, Abdulaziz Mohammad, Xinli Zhang, Min Lee, Cun-Yu Wang, Dean Ho
Patients with cleft lip and/or palate (CLP), who undergo numerous medical interventions from infancy, can suffer from lifelong debilitation caused by underdeveloped maxillae. Conventional treatment approaches use maxillary expansion techniques to develop normal speech, achieve functional occlusion for nutrition intake, and improve esthetics. However, as patients with CLP congenitally lack bone in the cleft site with diminished capacity for bone formation in the expanded palate, more than 80% of the patient population experiences significant postexpansion relapse...
August 29, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28795398/robust-fluorescent-labelling-of-micropipettes-for-use-in-fluorescence-microscopy-application-to-the-observation-of-a-mosquito-borne-parasite-infection
#13
Amanda E Balaban, Keir Neuman, Photini Sinnis, Robert S Balaban
The ability to monitor micropipette injections with a high-resolution fluorescent microscope has utility for a variety of applications. Herein, different approaches were tested for creating broad-band fluorescently labelled glass micropipettes including: UV cured glass glues, baked glass enamel containing fluorescent dyes as well as nanodiamonds attached during pipette formation in the microforge. The most robust and simplest approach was to use labelled baked enamel on the exterior of the pipette. This approach was tested using pipettes designed to mimic a mosquito proboscis for the injection of the malaria parasite, Plasmodium spp...
August 10, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28793776/water-adsorption-property-of-hierarchically-nanoporous-detonation-nanodiamonds
#14
Elda-Zoraida Pina-Salazar, Koki Urita, Takuya Hayashi, Ryusuke Futamura, Fernando Vallejos-Burgos, Jerzy Włoch, Piotr Kowalczyk, Marek Wiśniewski, Toshio Sakai, Isamu Moriguchi, Artur Piotr Terzyk, Eiji Osawa, Katsumi Kaneko
The detonation nanodiamonds form the aggregate having interparticle voids, giving a marked hygroscopic property. As the relationship between pore structure and water adsorption of aggregated nanodiamonds is not well understood yet, adsorption isotherms of N2 at 77 K and of water vapor at 298 K of the well-characterized aggregated nanodiamonds were measured. HR-TEM and X-ray diffraction showed that the nanodiamonds were highly crystalline and their average crystallite size was 4.5 nm. The presence of the graphitic layers on the nanodiamond particle surface was confirmed by the EELS examination...
August 9, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28772710/haemocompatibility-of-modified-nanodiamonds
#15
Michał Wąsowicz, Mateusz Ficek, Maciej S Wróbel, Ruchira Chakraborty, Dror Fixler, Paweł Wierzba, Małgorzata Jędrzejewska-Szczerska
This study reports the interactions of modified nanodiamond particles in vitro with human blood. Modifications performed on the nanodiamond particles include oxygenation with a chemical method and hydrogenation upon chemical vapor deposition (CVD) plasma treatment. Such nanodiamonds were later incubated in whole human blood for different time intervals, ranging from 5 min to 5 h. The morphology of red blood cells was assessed along with spectral measurements and determination of haemolysis. The results showed that no more than 3% of cells were affected by the nanodiamonds...
March 28, 2017: Materials
https://www.readbyqxmd.com/read/28765598/synthesis-and-multi-scale-tribological-behavior-of-wc-co-nanodiamond-nanocomposites
#16
Andy Nieto, Lin Jiang, Jaekang Kim, Dae-Eun Kim, Julie M Schoenung
Nanodiamonds (ND) present a unique combination of desirable mechanical, functional, and chemical characteristics that are ideally suited for reinforcing and enhancing the wear resistance of carbide based materials. Tungsten carbide cobalt (WC-Co) matrix nanocomposites reinforced with varying amounts of ND (2 - 10 vol.%) were synthesized here by spark plasma sintering. The rapid thermal consolidation route enabled attainment of dense samples with a significant retention of the metastable diamond phase. NDs affected the microstructural evolution, chemistry, and mechanical properties of WC-Co...
August 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28762520/nanomaterials-as-stationary-phases-and-supports-in-liquid-chromatography
#17
REVIEW
Sandya R Beeram, Elliott Rodriguez, Suresh Doddavenkatanna, Zhao Li, Allegra Pekarek, Darin Peev, Kathryn Goerl, Gianfranco Trovato, Tino Hofmann, David S Hage
The development of various nanomaterials over the last few decades has led to many applications for these materials in liquid chromatography (LC). This review will look at the types of nanomaterials that have been incorporated into LC systems and the applications that have been explored for such systems. A number of carbon-based nanomaterials and inorganic nanomaterials have been considered for use in LC, ranging from carbon nanotubes, fullerenes and nanodiamonds to metal nanoparticles and nanostructures based on silica, alumina, zirconia and titanium dioxide...
August 1, 2017: Electrophoresis
https://www.readbyqxmd.com/read/28756321/enhanced-nucleation-of-diamond-on-three-dimensional-tools-via-stabilized-colloidal-nanodiamond-in-electrostatic-self-assembly-seeding-process
#18
Tao Wang, Stephan Handschuh-Wang, Songquan Zhang, Xuechang Zhou, Yongbing Tang
Nanocrystalline diamond particles are promising candidates for copious applications in materials science, biology and electronics. In this work, diamond nucleation density was unprecedentedly enhanced via a non-invasive electrostatic self-assembly seeding approach. By addition of glutamic acid to the nanodiamond seeding solution, the positively charged amino-group of glutamic acid, which is adsorbed on nanodiamond particles, enhances the adsorption on negative charged cemented carbide substrate. The highest nucleation density (1...
November 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28754039/nanodiamond-chymotrypsin-and-nanodiamond-papain-conjugates-their-synthesis-and-activity-and-visualization-of-their-interaction-with-cells-using-optical-and-electron-microscopy
#19
Sergey A Golyshev, Anna K Berkovich, Ruslan Yu Yakovlev, Dmitry M Bystrov, Nikita M Ivanov, Galina N Balandina, Galina N Rudenskaya
Two novel conjugates of detonation nanodiamonds (dNDs) with the proteolytic enzymes chymotrypsin and papain were synthesized. The synthesis was performed via functionalization of the dNDs' surface with acidic/alkali treatment followed by carbodiimide-mediated protein binding. Covalent binding of the enzymes was confirmed by Fourier transform infrared spectrographic analysis and high-performance liquid chromatography (HPLC) amino acid analysis. HPLC also proved the preservation of the enzymes' composition during synthesis...
July 28, 2017: Biointerphases
https://www.readbyqxmd.com/read/28747768/controlling-adult-stem-cell-behavior-using-nanodiamond-reinforced-hydrogel-implication-in-bone-regeneration-therapy
#20
Settimio Pacelli, Ryan Maloney, Aparna R Chakravarti, Jonathan Whitlow, Sayantani Basu, Saman Modaresi, Stevin Gehrke, Arghya Paul
Nanodiamonds (NDs) have attracted considerable attention as drug delivery nanocarriers due to their low cytotoxicity and facile surface functionalization. Given these features, NDs have been recently investigated for the fabrication of nanocomposite hydrogels for tissue engineering. Here we report the synthesis of a hydrogel using photocrosslinkable gelatin methacrylamide (GelMA) and NDs as a three-dimensional scaffold for drug delivery and stem cell-guided bone regeneration. We investigated the effect of different concentration of NDs on the physical and mechanical properties of the GelMA hydrogel network...
July 26, 2017: Scientific Reports
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