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Journal articles on the topic 'CuO nano-clusters'

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1

Chen, Hao Long, Zin Ching Liou, and Shian Jang Lin. "Oxygen Plasma Induced ZnO-CuO Nanostructure Growth on a Brass Substrate by Atmospheric-Pressure Plasma Jet." Materials Science Forum 688 (June 2011): 186–90. http://dx.doi.org/10.4028/www.scientific.net/msf.688.186.

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A convenient method for direct and large-area growth of one-dimensional (1-D) CuO and ZnO nanostructures on a conductive brass substrate has been developed. The ZnO and CuO nanostructures have been simultaneously induced and growth on a brass (70Cu-30Zn alloy) substrate by using an atmospheric-pressure plasma jet (APPJ) with pure oxygen as the reaction gas in an ambient environment. Various one-dimensional (1-D) nanostructures such as nano-particles, nanowires, nanobelts, nanocombs, and nanosheets have been in situ grown on the brass substrates under different plasma treatment times. The plasm
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2

Suneel, Kumar Dandabattina, Oruganti Baswanth, Thaticharla Kaleswararao, Sen Anik, and Duvvuri Suryakala. "In silico studies to understand the adsorbent properties of CuO nano-clusters for toxic water soluble dyes." Journal of Indian Chemical Society Vol. 97, No. 9b, Sept 2020 (2020): 1531–38. https://doi.org/10.5281/zenodo.5657064.

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Department of Chemistry, GITAM Institute of Science, GITAM University (Deemed to be), Visakhapatnam-530 045, Andhra Pradesh, India <em>E-mail:</em> duvvurisuryakala@gmail.com <em>Manuscript received online 01 July 2020, accepted 31 August 2020</em> Structural analysis of extraordinary efficient CuO-CTAB (cetyl trimethyl ammonium bromide) and CuO-SDS (sodium dodecyl sulphate) nanoparticles and their adsorbing efficiency of significant dyes in aqueous media like Methylene blue, Rhodamine B and Congo red have been calculated using DFT calculations and compared with experimental studies. Structure
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3

Yamaguchi, Akinobu, Ikuo Okada, Takao Fukuoka, Mari Ishihara, Ikuya Sakurai, and Yuichi Utsumi. "One-Step Synthesis of Copper and Cupric Oxide Particles from the Liquid Phase by X-Ray Radiolysis Using Synchrotron Radiation." Journal of Nanomaterials 2016 (2016): 1–16. http://dx.doi.org/10.1155/2016/8584304.

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The deposition of copper (Cu) and cupric oxide (Cu4O3, Cu2O, and CuO) particles in an aqueous copper sulfate (CuSO4) solution with additive alcohol such as methanol, ethanol, 2-propanol, and ethylene glycol has been studied by X-ray exposure from synchrotron radiation. An attenuated X-ray radiation time of 5 min allows for the synthesis of Cu, Cu4O3, Cu2O, and CuO nano/microscale particles and their aggregation into clusters. The morphology and composition of the synthesized Cu/cupric oxide particle clusters were characterized by scanning electron microscopy, scanning transmission electron mic
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4

Yahia, I. S., G. F. Salem, M. S. Abd El-sadek, and F. Yakuphanoglu. "Optical properties of Al-CdO nano-clusters thin films." Superlattices and Microstructures 64 (December 2013): 178–84. http://dx.doi.org/10.1016/j.spmi.2013.09.024.

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5

Ligt, Bianca, Floriane A. Rollier, Tim Wissink, et al. "Insights into the Structure and Activity of Bimetallic Au/Cu2O Catalysts during CO2 Electroreduction to C2 products." ECS Meeting Abstracts MA2024-01, no. 37 (2024): 2135. http://dx.doi.org/10.1149/ma2024-01372135mtgabs.

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Despite its promising performance for C2+ product formation in electrochemical reduction of CO2 (CO2RR), Cu-based catalysts exhibit a relatively poor selectivity towards important chemical intermediates such as ethylene and ethanol. Up to 16 different products can typically be formed during CO2RR.1 Cu is the only element that can form C-C bonds at an appreciable rate.2 Therefore, it is critical to better understand the active sites of Cu-based electrocatalysts, as it can lead to better catalyst design with improved selectivity towards desired products. A common approach is to investigate the r
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6

Hatzor-De Picciotto, A., A. D. Wissner-Gross, G. Lavallee, and P. S. Weiss. "Arrays of Cu2+-complexed organic clusters grown on gold nano dots." Journal of Experimental Nanoscience 2, no. 1-2 (2007): 3–11. http://dx.doi.org/10.1080/17458080600925807.

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7

Tanaka, Kenichi, and Xiao Hong Jiang. "Nano-Size Surface Materials Stabilized by Weak Interaction." Materials Science Forum 614 (March 2009): 21–26. http://dx.doi.org/10.4028/www.scientific.net/msf.614.21.

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Scanning tunneling microscopy (STM) proved the existence of quasi-compounds on solid surfaces. A typical example is (-Ag-O-) or (-Cu-O-) chains grown on Ag(110) or Cu(110) surface by exposing to O2. The (-Ag-O-) chains on a Ag(110) reacts with Cu atoms to form a new quasi-compound of (-Cu-O-) chains on the Ag(110) surface. The (-Cu-O-) on the Ag(110) readily decomposes at ca. 570ºK to form Cu6 dots, and a reversible reaction of (Cu2)3 + O2. ↔ (-Cu-O-) takes place by exposing to O2. Deposited Zn, Sn and Ag atoms on a Si(111)-7x7 surface stabilize by forming Zn3, Sn2 and Sn, and Ag in a half uni
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8

Shen, Hui, Lingzheng Wang, Omar López-Estrada, et al. "Copper-hydride nanoclusters with enhanced stability by N-heterocyclic carbenes." Nano Research 14, no. 9 (2021): 3303–8. http://dx.doi.org/10.1007/s12274-021-3389-9.

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AbstractCopper-hydrides have been intensively studied for a long time due to their utilization in a variety of technologically important chemical transformations. Nevertheless, poor stability of the species severely hinders its isolation, storage and operation, which is worse for nano-sized ones. We report here an unprecedented strategy to access to ultrastable copper-hydride nanoclusters (NCs), namely, using bidentate N-heterocyclic carbenes as stabilizing ligands in addition to thiolates. In this work, a simple synthetic protocol was developed to synthesize the first large copper-hydride nan
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9

Ranc, Václav, Vladimír Havlíček, Petr Bednář, and Karel Lemr. "Nanoelectrospray versus electrospray in chiral analysis by the kinetic method." Collection of Czechoslovak Chemical Communications 74, no. 2 (2009): 313–22. http://dx.doi.org/10.1135/cccc2008201.

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Electrospray ionization generates trimeric diastereoisomeric clusters as the first important step in chiral analysis by mass spectrometry using the Cooks′ kinetic method. Cu2+ and L-tryptophan were used as a central metal and as a chiral reference ligand, respectively. The comparison of electrospray and nanoelectrospray showed that although the electrospray system was generally more robust, the application of nanoelectrospray was essential for performing successful analysis in some cases, especially for real samples. Basically, no significant differences between the ion sources were observed f
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10

Chen, Xiao Feng, Ying Jun Wang, Na Ru Zhao, et al. "Microstructure and Bio-Mineralization Behavior of the Sol-Gel Derived Bioactive Materials." Key Engineering Materials 280-283 (February 2007): 1609–12. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.1609.

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The biomaterials in system CaO-P2O5-SiO2 were synthesized via sol-gel method. The biomaterials can be applied to bone reparation and bone tissue engineering scaffolds The nano-pore structure, degradability, bioactivity and bio-mineralization characteristic of the biomaterials were investigated in details using XRD, SEM/EDX, FTIR, BET and DSC/TG techniques. It was indicated that the sol-gel derived biomaterials have a higher bioactivity than that of the melt derived bioactive glasses or glass-ceramics. It just takes 4-8 hours for HCA to form on the surface of the sol-gel samples in SBF solution
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11

Bystrov, Vladimir Sergeevich, and Sergey Valer'evich Filippov. "Computer modeling and numerical studies of peptide nanotubes based on diphenylalanine." Keldysh Institute Preprints, no. 78 (2021): 1–54. http://dx.doi.org/10.20948/prepr-2021-78.

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The work is devoted to computer studies of the structural and physical properties of such self-organizing structures as peptide nanotubes based on diphenylanine dipeptide with different initial isomers of the left and right chiralities of these dipeptides. The structures under study are considered both with empty anhydrous and with internal cavities filled with water molecules. Molecular models of both ring and helix structures are investigated, which are consistent with the known experimental data. To study the effect of nano-sized clusters of water molecules embedded in the inner hydrophilic
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12

Ngoepe, Phuti Esrom, Peter Ngobeni, and Khomotso Portia Maenetja. "DFT Studies of Catalytic Activity of Rutile Typed Metal Oxide (110) Surface in Sodium-Air Batteries." ECS Meeting Abstracts MA2022-02, no. 7 (2022): 2483. http://dx.doi.org/10.1149/ma2022-0272483mtgabs.

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Metal-air batteries, such as Li-air, have been extensively studied owing to their high theoretical energy density, which is up to three times that of the conventional to Li-ion batteries and interest in Na-air is now emerging [1,2, 3]. The current study is providing a better understanding of the catalytic activity of rutile typed MO2 (MnO2, TiO2 and VO2) for the oxygen reduction and oxygen evolution reactions in Na-air batteries, using density functional methods. When oxygen is adsorbed at the Na/MO2 (110) surface different clusters, such as superoxide, peroxo on Na/M, and dissociated configur
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13

Juelsholt, Mikkel, Robert House, and Peter Bruce. "Does Trapped Oxygen Form in the Bulk of LiNiO2 during Charging?" ECS Meeting Abstracts MA2024-02, no. 2 (2024): 229. https://doi.org/10.1149/ma2024-022229mtgabs.

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LiNiO₂ remains a critical archetypal material for high energy density Li-ion batteries, forming the basis of Ni-rich cathodes in use today.1-4 Nevertheless, there are still uncertainties surrounding the charging mechanism at high states of charge and the potential role of oxygen redox.5-11 Substantial efforts have been made to understand these phenomena and the structural transitions that take place when Li is extracted from LiNiO₂, but there remains considerable debate over the extent of Ni oxidation and O-redox in LiNiO₂.4-11 Recent research into O oxidation in Li-rich cathodes, such as Li1.
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14

Assanto, Gaetano, Sreekanth Perumbilavil, Armando Piccardi, and Martti Kauranen. "Electro-optic steering of random laser emission in liquid crystals." Photonics Letters of Poland 10, no. 4 (2018): 103. http://dx.doi.org/10.4302/plp.v10i4.852.

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Using an external low-frequency electric field applied to dye-doped nematic liquid crystals, we demonstrate that random lasing obtained by optical pumping can be steered in angular direction by routing an all-optical waveguide able to collect the emitted light. By varying the applied voltage from 0 to 2 V, we reduce the walk-off and sweep the random laser guided beam over 7 degrees. Full Text: PDF ReferencesV. S. Letokhov, "Generation of light by a scattering medium with negative resonance absorption," Sov. Phys. JETP 26 (4), 835 (1968). DirectLink H. Cao, J. Y. Xu, D. Z. Zhang, S.-H. Chang, S
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15

Dr.E.Bharathi, S.Ravikumar, and Dr.S.Senthilvelan. "Nanostructured CuO and G-CuO : Combined Experimental and Theoretical Studies." October 11, 2022. https://doi.org/10.5281/zenodo.7186734.

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The G -CuO composite is synthesized by simple sol-gel process. Guanine interactions with CuO nanocluster of various sizes have been investigated. The geometric and electronic structures of CuO and G-CuO have been evaluated by using DFT, B3LYP/ LANL2DZ method. The different clusters were optimized to study the HOMO-LUMO energy gap and binding energy of CuO and G-CuO. The electronic structures of clusters were discussed in terms of HOMO-LUMO energy gap and DOS states. Mulliken charges are computed. The prepared G-CuO and CuO nano composites have been characterized by FT-IR, HR-SEM, EDAX and FT-R
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16

Loya, Adil, Jacqueline L. Stair, Farid Uddin, and Guogang Ren. "Molecular dynamics simulation on surface modification of quantum scaled CuO nano-clusters to support their experimental studies." Scientific Reports 12, no. 1 (2022). http://dx.doi.org/10.1038/s41598-022-16751-w.

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AbstractInterest in nanoparticle modification using functional chemicals has increased rapidly, as it allows more freedom of physiochemical tuning of the nanoparticle’s surface into biomedically oriented and designated properties. However, the observation and detection of the thin molecular layers on the nanoparticle surface are very challenging under current analytical facilities. The focus of this research is to demonstrate fundamental interactions between the surface treated nanoparticles and their host liquid media using lab-based experimentation and simulation. In this research, investiga
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17

Song, Hyunseok, Soo‐Yoon Hwang, Kil‐Dong Sung, et al. "Localized Flexoelectric Effect Around Ba(CuNb) Nano‐Clusters in Epitaxial BiFeO3 Films for Enhancement of Electric and Multiferroic Properties." Advanced Functional Materials, October 30, 2024. http://dx.doi.org/10.1002/adfm.202416179.

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AbstractRoom‐temperature (RT) multiferroic materials have received significant research attention for various potential applications; however, their properties are not suitable for real‐world implementation. In this study, a nano‐scale localized flexoelectric effect is introduced to enhance the RT multiferroic performance of epitaxial bismuth iron oxide (BiFeO3; BFO) thin films by embedding 10 mol% Ba(Cu1/3Nb2/3)O3 (BCN) nano‐clusters into the host BFO film, which originally has a rhombohedral crystal structure. By utilizing nano‐clustering, a large out‐of‐plane coherent strain is localized ar
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18

Matsuo, Yoji, Satoshi Shinohara, Shigeo Mori, Yoichi Horibe, Kenji Yoshii, and Naoshi Ikeda. "Doping Effect on the Charge Ordering in LuFe2O4." MRS Proceedings 966 (2006). http://dx.doi.org/10.1557/proc-0966-t03-04.

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ABSTRACTChange of the charge ordered (CO) structure by substituting Cu2+ for Fe2+ in LuFe2O4 was investigated by means of the transmission electron microscopy. The CO structure in LuFe2O4 is characterized by the modulated structure with the wave vector of q=1/3[1-13/2] and the average size of the CO domains can be estimated to be about 10-20nm. On the contrary, the Cu2+ substitution in LuFe2O4 destroyed the CO structure drastically and induced characteristic local lattice distortion, which gives rise to characteristic diffuse scattering in the reciprocal space. High-resolution lattice images r
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19

Tatsuma, Tetsu, Makoto Nakakido, Takeshi Ichinohe, et al. "Inactivation and spike protein denaturation of novel coronavirus variants by CuxO/TiO2 nano-photocatalysts." Scientific Reports 13, no. 1 (2023). http://dx.doi.org/10.1038/s41598-023-30690-0.

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AbstractIn order to reduce infection risk of novel coronavirus (SARS-CoV-2), we developed nano-photocatalysts with nanoscale rutile TiO2 (4–8 nm) and CuxO (1–2 nm or less). Their extraordinarily small size leads to high dispersity and good optical transparency, besides large active surface area. Those photocatalysts can be applied to white and translucent latex paints. Although Cu2O clusters involved in the paint coating undergo gradual aerobic oxidation in the dark, the oxidized clusters are re-reduced under &gt; 380 nm light. The paint coating inactivated the original and alpha variant of no
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20

Gashnikova, Daria, Florian Maurer, Eric Sauter, et al. "Inside Back Cover: Highly Active Oxidation Catalysts through Confining Pd Clusters on CeO2 Nano‐Islands." Angewandte Chemie International Edition, July 22, 2024. http://dx.doi.org/10.1002/anie.202413055.

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21

Gashnikova, Daria, Florian Maurer, Eric Sauter, et al. "Inside Back Cover: Highly Active Oxidation Catalysts through Confining Pd Clusters on CeO2 Nano‐Islands." Angewandte Chemie, July 22, 2024. http://dx.doi.org/10.1002/ange.202413055.

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