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Journal articles on the topic 'Nano-Seeding'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Tsigkourakos, Menelaos, Thomas Hantschel, Kai Arstila, and Wilfried Vandervorst. "Diamond nano-particle seeding for tip moulding application." Diamond and Related Materials 35 (May 2013): 14–18. http://dx.doi.org/10.1016/j.diamond.2013.03.008.

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2

Okada, K., T. Sakamoto, K. Fujiwara, A. N. Hattori, T. Kanki, and H. Tanaka. "Three dimensional nano-seeding assembly of ferromagnetic Fe/LaSrFeO4 nano-hetero dot array." Journal of Applied Physics 112, no. 2 (2012): 024320. http://dx.doi.org/10.1063/1.4739719.

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3

Voropaeva, N., V. Karpachev, V. Varlamov, and Oleg L. Figovsky. "Influence of Improved (Nano) Systems on Cultivated Corn Growth, Development and Yield." International Letters of Chemistry, Physics and Astronomy 28 (February 2014): 1–7. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.28.1.

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Using physiologically active, complex, polyfunctional, multicomponent (nano) systems – (nano) chips in the pre-sowing soya treatment (nano) technology allows precise seeding; enhancing field seed germination; reducing plant morbidity rate considerably or even deleting disease incidents; increasing plant adaptability to unfavorable environmental conditions; expanding crop yield; improving products quality by not using toxic chemical means of plant protection; intensifying competitive ability of agricultural products as well as assuring environmental safety in crop cultivation regions.

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4

Shamsaei, Ezzatollah, Xiaocheng Lin, Li Wan, Yuping Tong, and Huanting Wang. "A one-dimensional material as a nano-scaffold and a pseudo-seed for facilitated growth of ultrathin, mechanically reinforced molecular sieving membranes." Chemical Communications 52, no. 95 (2016): 13764–67. http://dx.doi.org/10.1039/c6cc07709a.

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A new pseudo-seeding and nano-scaffolding method was developed to synthesize thin ZIF-8 hybrid membranes (100–200 nm) with remarkable mechanical and structural stability and good gas separation properties.

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5

Voropaeva, N., V. Karpachev, V. Varlamov, and Oleg L. Figovsky. "Influence of Efficient, Multicomponent, Polyfunctional, Physiologically Active (Nano) Chips with Herbicide Activity on Rice Crop Growth, Development, Yield and on Weed Growth Inhibition." International Letters of Chemistry, Physics and Astronomy 26 (January 2014): 62–68. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.26.62.

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Using physiologically active, complex, polyfunctional, multicomponent (nano) systems – (nano) chips in the pre-sowing rice treatment (nano) technology allows precise seeding; enhancing field seed germination; reducing plant morbidity rate considerably or even deleting disease incidents; increasing plant adaptability to unfavorable environmental conditions; expanding crop yield; improving products quality by not using toxic chemical means of plant protection; intensifying competitive ability of agricultural products as well as assuring environmental safety in crop cultivation regions. Nutrition micro- and mesoelements, as also intense activity plant growth regulators and other physiologically active substances, depending on the crop variety, cultivation conditions and possible risks, can be added to such pre-sowing treatment (nano) technology.

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6

Sato, Taijiro, and Fatoumata Diallo. "Seeding Effect of Nano-CaCO3 on the Hydration of Tricalcium Silicate." Transportation Research Record: Journal of the Transportation Research Board 2141, no. 1 (2010): 61–67. http://dx.doi.org/10.3141/2141-11.

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7

Hiraki, Akio. "Electron-emitter fabricated at low temperature by diamond-nano-seeding technique." Materials Chemistry and Physics 72, no. 2 (2001): 196–200. http://dx.doi.org/10.1016/s0254-0584(01)00435-7.

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8

Okada, K., and H. Tanaka. "Compositionally tunable three-dimensional nano-seeding assembly in Fe–LaSrFeO4 nanostructure." Journal of Applied Physics 113, no. 6 (2013): 064317. http://dx.doi.org/10.1063/1.4791756.

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9

S. D., Polishchuk, Nazarova A. A., Byshov N. V., Kuznetsov D. V., Churilov D. G., and Churilov G. I. "Physiological and Biochemical Grounding of Different Nanomaterials Use WhenGrowing Corn Seeds." Modern Applied Science 11, no. 1 (2016): 195. http://dx.doi.org/10.5539/mas.v11n1p195.

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We have investigated in labandfield conditions the influence of cornpre-plant treatment with cuprum and cobalt nano particles and humicacids. We have determined the vitaland morpho-physiological parameters of plants and shown that the effective concentrations are within the limit 0.1-1.0 gper hectare norm of seeding rate. We have discovered that nano particlesi ncrease photosynthesis efficiency andactivate oxidation-reduction ferments and parameters of mineral metabolismthat increases fat in grown seeds by 0.63% as compared with the control.

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10

Eliyahu, A., J. Buehler, M. Ben-Chorin, H. Cohen, and Yehian Prior. "Nano-particles seeding and its characterization by X-ray photoelectron spectroscopy (XPS)." Diamond and Related Materials 8, no. 2-5 (1999): 146–49. http://dx.doi.org/10.1016/s0925-9635(98)00399-9.

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11

Shim, Byung Young, Eun A. Ko, Dong Wook Kim, and Cheul Ro Lee. "Growth and Characterization of GaN Nano-Column Grown on Si (111) Substrate Using Au+Ga Alloy Seeding Method by MOCVD." Solid State Phenomena 124-126 (June 2007): 113–18. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.113.

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We have studied the Au+Ga alloy seeding method. Single-crystal GaN nano-column arrays were grown using metalorganic chemical vapor deposition (MOCVD) and their properties were investigated as a function of the growth parameters and Au thin film thickness. Au-coated Si(111) substrates were used for the growth of GaN nano-columns. The diameter and length of as-grown nano-column ranged from 100 to 500 nm and 1 to 5 μm, respectively. The morphology of the columns was investigated using scanning electron microscopy. Energy dispersive X-ray spectroscopy and photoluminescence were used for evaluating of its qualitative analysis and to evaluate the optical properties, respectively. Two important growth parameters were considered, the thickness of the Au thin film and the gallium flow rate. The density and tendency of the nano-columns depend on each of these growth parameters. It is believed that the catalytic activity of gold is determined by the size of the Au+Ga solid solution particles, and smaller Au+Ga clusters showed significant reactivity in the growth of one-dimensional GaN nano structures.

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12

Asl, Shahab Khameneh, S. K. Sadrnezhaad, and M. Kianpour rad. "The seeding effect on the microstructure and photocatalytic properties of ZnO nano powders." Materials Letters 64, no. 18 (2010): 1935–38. http://dx.doi.org/10.1016/j.matlet.2010.06.043.

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13

Ma, Xingfa, Xiaobin Zhang, Yu Li, et al. "Gas sensing behavior of nano-structured polypyrrole prepared by “carbon nanotubes seeding” approach." Journal of Nanoparticle Research 10, no. 2 (2007): 289–96. http://dx.doi.org/10.1007/s11051-007-9248-0.

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14

Song, Jae Chul, D. H. Kang, Seon Ho Lee, et al. "Growth of GaN Nano-Column on Si (111) Substrate Using Au+Ga Alloy Seeding by Pulsed Flow Method Using MOCVD." Advanced Materials Research 31 (November 2007): 108–10. http://dx.doi.org/10.4028/www.scientific.net/amr.31.108.

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Vertical GaN nano-columns arrays were grown on Au-coated silicon (111) substrate by Au+Ga alloy seeding method and pulsed flow of Gallium and ammonia using metalorganic chemical vapor deposition (MOCVD). A gold thin film was deposited on Si using an ion coating system. The Au coated Si substrate was annealed at 800 oC under hydrogen ambient for 5 min. The pre-deposition of gallium and nitrogen was performed for 60 sec to form Au+Ga and nitrogen solid solution, which acts as the initial nucleation islands. Then Gallium and ammonia were let in pulse method. Scanning electron microscopy (SEM) image reveals a vertical growth and cylindrical in shape GaN nano-column. From the sharp PL peak intensity it is clearly seen that the dislocation density is reduced considerably and the optical quality of the nano-column is improved.

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15

Ibara, Asako, Hirofumi Miyaji, Bunshi Fugetsu та ін. "Osteoconductivity and Biodegradability of Collagen Scaffold Coated with Nano-β-TCP and Fibroblast Growth Factor 2". Journal of Nanomaterials 2013 (2013): 1–11. http://dx.doi.org/10.1155/2013/639502.

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Nanoparticle bioceramics have become anticipated for biomedical applications. Highly bioactive and biodegradable scaffolds would be developed using nanoparticles ofβ-tricalcium phosphate (β-TCP). We prepared collagen scaffolds coated by nano-β-TCP and fibroblast growth factor 2 (FGF2) and evaluated the effects on new bone augmentation and biodegradation. The collagen sponge was coated with the nano-TCP dispersion and freeze-dried. Scaffold was characterized by SEM, TEM, XRD, compressive testing and cell seeding. Subsequently, the nano-β-TCP/collagen scaffold, collagen sponge, and each material loaded with FGF2 were implanted on rat cranial bone. As a control, no implantation was performed. Nano-TCP particles were found to be attached to the fibers of the collagen sponge by SEM and TEM observations. Scaffold coated with nano-TCP showed higher compressive strength and cytocompatibility. In histological evaluations at 10 days, inflammatory cells were rarely seen around the residual scaffold, suggesting that the nano-TCP material possesses good tissue compatibility. At 35 days, bone augmentation and scaffold degradation in histological samples receiving nano-β-TCP scaffold were significantly greater than those in the control. By loading of FGF2, advanced bone formation is facilitated, indicating that a combination with FGF2 would be effective for bone tissue engineering.

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16

Chen, Kei-Wei, Ying-Lang Wang, Jung-Chih Tsao, and Kuang-Yao Lo. "The Integration Solution of Copper Barrier Deposition for Nanometer Interconnect Process." Journal of Nanoscience and Nanotechnology 8, no. 5 (2008): 2500–2504. http://dx.doi.org/10.1166/jnn.2008.611.

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As the dimensions of devices are shrunk quickly, the requirements of metallization become more critical. For VIA barrier and seeding layer filling and deposition, the process was mostly applied with the copper physical vapor deposition methodology in the back-end of line flow of the interconnection metallization. The criteria for barrier and seeding layer deposition are the metal continuity inside the VIA feature and grain size and orientation control for film diffusion barrier and qualities. Besides, while the interconnection size shrunk to nano-scale, the barrier thickness would be very thinner to maintain the VIA resistance; however, it would face the film conformity and continuity consistence within the wafer and different features. The integration solution would be developed and studied with the re-sputter process step adding into the convectional physical vapor deposition process. The resputter process step could not only improve the film conformity and continuity in the VIA's sidewall; but also reduce the resistance of VIA feature over 20%. The improvement of the resputter method adding into the deposition process would be contributed to the standard barrier deposition in the nano-scale feature of the interconnect. Besides, we also discussed the effect of the film properties after the resputter process introduced into the barrier deposition.

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17

Javdani, Amirhossein, Javad Ahmadpour, and Fereydoon Yaripour. "Nano-sized ZSM-5 zeolite synthesized via seeding technique for methanol conversions: A review." Microporous and Mesoporous Materials 284 (August 2019): 443–58. http://dx.doi.org/10.1016/j.micromeso.2019.04.063.

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18

Sun, Qiming, Ning Wang, Risheng Bai, Xiaoxin Chen, and Jihong Yu. "Seeding induced nano-sized hierarchical SAPO-34 zeolites: cost-effective synthesis and superior MTO performance." Journal of Materials Chemistry A 4, no. 39 (2016): 14978–82. http://dx.doi.org/10.1039/c6ta06613e.

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19

Sun, Yanqun, Peng Zhang, Weina Guo, Jiuwen Bao, and Chengping Qu. "Effect of Nano-CaCO3 on the Mechanical Properties and Durability of Concrete Incorporating Fly Ash." Advances in Materials Science and Engineering 2020 (April 9, 2020): 1–10. http://dx.doi.org/10.1155/2020/7365862.

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Concrete mixtures consisting of nanomaterials and fly ash have been shown to be effective for improving the performance of concrete. This study investigates the combined effects of nano-CaCO3 and fly ash on the mechanical properties and durability of concrete; the mix proportion is optimized through orthogonal experiments. In the first phase, nine concrete mixtures were prepared with three water-to-binder ratios (0.4, 0.5, and 0.6), three fly ash contents (15%, 20%, and 25% replacement of the cement weight), and three nano-CaCO3 contents (1%, 2%, and 3% replacement of the cement weight). Based on the orthogonal analysis, the optimal concrete mix proportion was determined as a water-to-binder ratio of 0.4, 20% fly ash, and 1% nano-CaCO3. In the second phase, further investigations were carried out to examine the superiority of the optimal concrete and evaluate the synergistic effect of nano-CaCO3 and fly ash. The results showed that nano-CaCO3 contributed to increasing the compressive strength of fly ash concrete at the early ages, but its effect was quite limited at later ages. Furthermore, the scanning electron microscopy analysis revealed that the seeding effect, filling effect, and pozzolanic effect were the primary mechanisms for the improvement of concrete performance.

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20

Deka, Anindita, Pintu Barman, Gourab Bhattacharjee, and S. R. Bhattacharyya. "Evolution of ion-induced nano-dot patterns on silicon surface in presence of seeding materials." Applied Surface Science 526 (October 2020): 146645. http://dx.doi.org/10.1016/j.apsusc.2020.146645.

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21

Hassan, El Sayied, Aly Sarhan, Al Sayied Gaballah, and Abd El Rady Ibrahim. "EFFECT OF NANO-FERTILIZER, SEEDING RATE AND NITROGEN FERTILIZATION ON BARLEY YIELD UNDER SINAI CONDITIONS." Journal of Productivity and Development 26, no. 3 (2021): 391–413. http://dx.doi.org/10.21608/jpd.2021.181067.

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22

Kim, J. H., S. K. Lee, O. M. Kwon, and D. S. Lim. "Ultra Thin CVD Diamond Film Deposition by Electrostatic Self-Assembly Seeding Process with Nano-Diamond Particles." Journal of Nanoscience and Nanotechnology 9, no. 7 (2009): 4121–27. http://dx.doi.org/10.1166/jnn.2009.m20.

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23

Maswada, H. F., M. Djanaguiraman, and P. V. V. Prasad. "Seed treatment with nano-iron (III) oxide enhances germination, seeding growth and salinity tolerance of sorghum." Journal of Agronomy and Crop Science 204, no. 6 (2018): 577–87. http://dx.doi.org/10.1111/jac.12280.

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24

Agbolaghi, S., S. Abbaspoor, and F. Abbasi. "Synthesis of polymer nano-brushes by self-seeding method and study of various morphologies by AFM." International Nano Letters 6, no. 1 (2015): 11–19. http://dx.doi.org/10.1007/s40089-015-0166-3.

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25

Wei, Ya Na, Xiu Lan Xin, Yang Yu, and Hai Chao Zhu. "Synthesis of Nano-Emulsion with Allyl-Type Sodium Succinate Diester Emulsifier." Advanced Materials Research 380 (November 2011): 3–6. http://dx.doi.org/10.4028/www.scientific.net/amr.380.3.

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In this study 50-70nm Nano-emulsion was synthesized by semi-continuous seeding emulsion with the compound of the different long-chain of carbon of the Allyl-type sodium Succinate Diester Emulsifier and traditional emulsifier. The type and amount of emulsifier, initiator and monomer ratio on the amount and impact of acrylic emulsion were discussed. The results showed that the obtained acrylic emulsion with the presence of polymerizable emulsion has significant lower water absorption and greater stability than that with the presence of traditional emulsifier. Measuring the solid content , particle size, stability, morphology, glass transition temperature and water absorption of the emulsion with the three types of allyl-type polymerizable emulsifier(sodium octyl allyl succinate (DOAS), sodium dodecyl succinate (SDAS) , tetradecyl sodium allyl succinate (TSAS)), considering various factors, sodium dodecyl allyl succinate has better emulsification.

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26

Wang, Hua Nan, Yu Bao Li, Yi Zuo, Lin Cheng, Yuan Yuan Wang, and Hong Li. "Nano-Hydroxyapatite/Polymer Composite Scaffold for Bone Tissue Engineering." Key Engineering Materials 330-332 (February 2007): 365–68. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.365.

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Nano-hydroxyapatite/polyamide66 (n-HA/PA66) composite scaffolds are prepared using phase separation and phase separation in combination with particle leaching, and both the composite powder and paste are used as starting materials. The composite is characterized by IR and XRD. The micro-architecture of the scaffolds is observed by SEM, and the mechanisms that the formation of the porous structure follows have been investigated preliminarily. The results show that scaffold prepared by phase separation in combination with particle leaching method using composite powder as starting material possesses controllable porosity and interconnectivity, as well as good mechanical strength comparable to human cancellous bone, suitable for being the tissue-engineered scaffold for load-bearing bone repair. Furthermore, scaffold made by phase separation using composite paste as starting material exhibits an anisotropy both in morphology and mechanical properties, which indicates the potential of guiding cell seeding, distribution and new tissue formation in preferential direction.

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27

Ma, Xingfa, Xiaobin Zhang, Yu Li, et al. "Preparation of Nano-Structured Polyaniline Composite Film via “Carbon Nanotubes Seeding” Approach and its Gas-Response Studies." Macromolecular Materials and Engineering 291, no. 1 (2006): 75–82. http://dx.doi.org/10.1002/mame.200500296.

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28

Kobayashi, Yoshio, Kenshi Miyajima, Daisuke Nagao, et al. "Direct micropatterning of high dielectric BaTiO3 films by laser-induced pyrolysis with a nano-crystalline seeding technique." Applied Surface Science 253, no. 12 (2007): 5293–301. http://dx.doi.org/10.1016/j.apsusc.2006.12.015.

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29

Shevtsov, Maxim A., Natalia Yudintceva, Miralda Blinova, et al. "Application of the skin and bone integrated pylon with titanium oxide nanotubes and seeded with dermal fibroblasts." Prosthetics and Orthotics International 39, no. 6 (2014): 477–86. http://dx.doi.org/10.1177/0309364614550261.

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Background: Direct skeletal attachment of limb prostheses is associated with high rate of transcutaneous infection and loosening of the fixture in the medullary canal prompting for careful assessment of various means for enhancing the skin-device and bone-device interface. The skin and bone integrated pylon system constitutes a technological platform for different modifications being evaluated previously. Objectives: The current study assessed the combination of nano-treatment skin and bone integrated pylon with its pre-seeding with dermal fibroblasts. We hypothesized that this combination will enhance cell interaction with skin and bone integrated pylon compared to nano-treatment and the fibroblast seeding when done separately. Study design: The feasibility and safety of in-bone implantation of the skin and bone integrated pylon with nanotubes was investigated in vitro and in vivo in the animal model. Methods: TiO2 nanotubes were fabricated on the skin and bone integrated pylon, and the fibroblasts taken from rabbit’s skin were cultured on the pylons before implantation. Results: The in vitro experiments demonstrated higher cellular density in the samples with a nanotubular surface than in the non-modified pylons used as control. There were no postoperative complications in any of the animals during the 6-month observation period. Subsequent scanning electron microscopy of the pylon extracted from the rabbit’s femur showed the stable contact between the pylon and soft tissues in comparison to control samples where the patchy fibrovascular ingrowth was detected. Conclusion: The promising results prompt further investigation of the integrative properties of the nanotextured skin and bone integrated pylon system seeded with dermal fibroblasts and its optimization for clinical application. Clinical relevance The study is devoted to the development of more safe and efficient technology of direct skeletal attachment of limb prostheses aimed in improving quality of life of people with amputations.

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30

Jang, Eun-Su, Seon-Ho Lee, Heon Song, et al. "GaN Nano-Column Growth on a Si(111) Substrate by Using a Pt+GaAlloy Seeding Method with MOCVD." Journal of the Korean Physical Society 53, no. 9(5) (2008): 2692–95. http://dx.doi.org/10.3938/jkps.53.2692.

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31

Shaaban, Ali, Shigenari Hayashi та Kazuhisa Azumi. "Promotion of α-Al2O3 formation on an Ni–Al alloy using a Ni–Fe2O3 nano-composite seeding layer". Surface and Coatings Technology 266 (березень 2015): 113–21. http://dx.doi.org/10.1016/j.surfcoat.2015.02.025.

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32

Yen, Fu Su, Huei Shan Lo, Hui Lin Wen та Rung Je Yang. "θ- to α-phase transformation subsystem induced by α-Al2O3-seeding in boehmite-derived nano-sized alumina powders". Journal of Crystal Growth 249, № 1-2 (2003): 283–93. http://dx.doi.org/10.1016/s0022-0248(02)02148-6.

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33

Sakamoto, Takuya, Koichi Okada, Azusa N. Hattori, et al. "Epitaxial inversion on ferromagnetic (Fe,Zn)3O4 /ferroelectric BiFeO3 core-shell nanodot arrays using three dimensional nano-seeding assembly." Journal of Applied Physics 113, no. 10 (2013): 104302. http://dx.doi.org/10.1063/1.4794810.

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34

Ranjbaran Lodrijeh, Sara, Sima Askari, and Rouein Halladj. "Seeding-induced nano-sized SAPO-34 synthesis with superior MTO performance: Energy-efficient approach with highly reduced OSDA consumption." Powder Technology 389 (September 2021): 383–91. http://dx.doi.org/10.1016/j.powtec.2021.05.042.

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35

Lu, Fan Xiu, Yu Mei Tong, X. H. Gao, Wei Zhong Tang, Cheng Ming Li, and Guang Chao Chen. "Preparation of Diamond Film Coatings on Multi-Spectrum ZnS." Materials Science Forum 475-479 (January 2005): 3599–604. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.3599.

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In the present investigation a specially designed ceramic interlayer, which is able to supply suitable protection of the ZnS substrate against chemical attack by atomic hydrogen, and is helpful to reduce the thermal stress, has been developed. Nano-crystalline diamond films were successfully deposited on to the pre-coated multi-spectrum ZnS. It was found that diamond nucleation on the ceramic interlayer could be greatly enhanced by a metal or semiconductor mask placed on top of the pre-coated ZnS substrate, whereas diamond nucleation will not happen even by long time seeding in ultrasonic bath with fine diamond powder suspension. It was found that diamond nucleation is induced by the presence of the metal or semiconductor mask. To our knowledge this kind of phenomena of induced nucleation has not been reported. Detailed results and discussions were presented.

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36

Deng, Yuchen, Yaming Zhang, Nanlong Zhang, Qiang Zhi, Bo Wang, and Jianfeng Yang. "Preparation and characterization of pure SiC ceramics by high temperature physical vapor transport induced by seeding with nano SiC particles." Journal of Materials Science & Technology 35, no. 12 (2019): 2756–60. http://dx.doi.org/10.1016/j.jmst.2019.04.039.

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37

Coste, Marie, Timothée Molière, Nikolay Cherkashin, et al. "Morphology of GaAs crystals heterogeneously integrated on nominal (001) Si by epitaxial lateral overgrowth on tunnel oxide via Ge nano-seeding." Thin Solid Films 647 (February 2018): 13–18. http://dx.doi.org/10.1016/j.tsf.2017.12.015.

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38

Shim, Byung-Young, Eun-A. Ko, Jae-Chul Song, et al. "Self-Assembled GaN Nano-Column Grown on Si(111) Substrate Using Au+Ga Alloy Seeding Method by Metalorganic Chemical Vapor Deposition." Japanese Journal of Applied Physics 46, no. 4B (2007): 2571–73. http://dx.doi.org/10.1143/jjap.46.2571.

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39

Kobayashi, Yoshio, Naoki Shimizu, Daisuke Nagao, Akira Watanabe, and Mikio Konno. "Fabrication of BaTiO3 Micropatterns by a Combination of Laser-Induced Pyrolysis Method and Nano-Crystalline Seeding Technique and Their Dielectric Properties." JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 43, no. 2 (2010): 132–39. http://dx.doi.org/10.1252/jcej.09we146.

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40

Cestari, Francesca, Francesca Agostinacchio, Anna Galotta, Giovanni Chemello, Antonella Motta, and Vincenzo M. Sglavo. "Nano-Hydroxyapatite Derived from Biogenic and Bioinspired Calcium Carbonates: Synthesis and In Vitro Bioactivity." Nanomaterials 11, no. 2 (2021): 264. http://dx.doi.org/10.3390/nano11020264.

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Biogenic calcium carbonates naturally contain ions that can be beneficial for bone regeneration and therefore are attractive resources for the production of bioactive calcium phosphates. In the present work, cuttlefish bones, mussel shells, chicken eggshells and bioinspired amorphous calcium carbonate were used to synthesize hydroxyapatite nano-powders which were consolidated into cylindrical pellets by uniaxial pressing and sintering 800–1100 °C. Mineralogical, structural and chemical composition were studied by SEM, XRD, inductively coupled plasma/optical emission spectroscopy (ICP/OES). The results show that the phase composition of the sintered materials depends on the Ca/P molar ratio and on the specific CaCO3 source, very likely associated with the presence of some doping elements like Mg2+ in eggshell and Sr2+ in cuttlebone. Different CaCO3 sources also resulted in variable densification and sintering temperature. Preliminary in vitro tests were carried out (by the LDH assay) and they did not reveal any cytotoxic effects, while good cell adhesion and proliferation was observed at day 1, 3 and 5 after seeding through confocal microscopy. Among the different tested materials, those derived from eggshells and sintered at 900 °C promoted the best cell adhesion pattern, while those from cuttlebone and amorphous calcium carbonate showed round-shaped cells and poorer cell-to-cell interconnection.

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41

Ghafaralahi, Shirin, Mehdi Ebrahimian-Hosseinabadi, and Anousheh Zargar Kharazi. "Poly(glycerol-sebacate)/poly(caprolactone)/graphene nanocomposites for nerve tissue engineering." Journal of Bioactive and Compatible Polymers 33, no. 5 (2018): 529–42. http://dx.doi.org/10.1177/0883911518793912.

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In this study, mechanical, electrical, physical, and biological properties of polymeric matrixes comprising poly(glycerol-sebacate) (PGS) and poly(caprolactone) (PCL) with various weight ratio of PGS:PCL (1:3 and 1:1) were evaluated in order to apply as nerve guidance conduit. For this purpose, synthetic PGS pre-polymer was acquired using poly-condensation of glycerol and sebacic acid and characterized by attenuated total reflection-fourier transformed infrared (ATR-FTIR) and X-ray diffraction (XRD) spectroscopies. Furthermore, the effect of 1 wt% graphene (Gr) Nano sheets incorporation as filler, was investigated. Blending PGS with PCL significantly improves the hydrophilicity of the samples and improves cells attachment; however, their mechanical properties decreased dramatically. Presence of Gr within the polymeric matrix, significantly increased elastic modulus and tensile strength, which is possibly attributed to its superior mechanical properties and high aspect of ratio. Moreover, aforementioned polymeric matrixes, turned to conductive membranes by addition of Gr, which affected drastically on their biological properties; that way, 3, 4, 5-dimethylthiazol-2, 5-diphenyl tetrazolium bromide assay elucidated that only addition of 1 wt% Gr to the polymeric films resulted in improved cell survival and cell attachment for 7 days of cell seeding. In addition, cell attachment was enhanced considerably by increasing PGS up to 50 wt%, due to positive role of PGS on contact angle reduction. Therefore, the nano-composite film (50PGS-50PCL-1Gr) can be a promising substrate to use as a nerve guidance conduit.

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Yuwono, A. H., Nofrijon Sofyan, S. Harjanto, et al. "One-Dimensional ZnO Nanostructures by Wet-Chemistry Technique for Dye Sensitized Solar Cell Application." Advanced Materials Research 576 (October 2012): 406–12. http://dx.doi.org/10.4028/www.scientific.net/amr.576.406.

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In the current work, ZnO nanoflowers have been synthesized via sol-gel technique using a mixture of zinc-nitratetetrahydrate, ammonia and polyethylene glycol (PEG). Variation in PEG concentration and ammonia evaporation delay time was performed and the resulting nanoflowers have been investigated using x-ray diffraction (XRD) and scanning electronmicroscope (SEM). To explore the potential of the resulting ZnO nanorods, a prototype of dye sensitized solar cell (DSSC) has been fabricated. For this purpose, the nanorods were grown directly on conducting ITO substrates by nanoseeding technique. With a variation in nano seeding time for 2, 4 and 6 days, followed by hydrothermal process at 80oC for 20 hours, ZnO nanorods with average diameter of 82, 332 and 1385 nm have been synthesized. The performance test showed the resulting open circuit voltage (Voc) was increased from 398 to 486 mV when the diameter of ZnO nanorods increased from 82 to 332 nm. However, the Voc decreased slightly to 456 mV when the nanorods further increased to 1385nm. The phenomenon is related to the interaction between the semiconductor oxide and the Ruthenium complex organic dye.

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Sathish, T. "Heat Transfer Analysis Of Nano-fluid Flow In A Converging Nozzle With Different Aspect Ratios." Journal of New Materials for Electrochemical Systems 20, no. 4 (2017): 161–67. http://dx.doi.org/10.14447/jnmes.v20i4.321.

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The study evaluates the nanofluid using finite element analysis with base fluid (water) and seeding particles (Aluminum oxide). This is placed over a convergence channel consisting of varying aspect ratio that are evaluated quantitatively to enhance the heat transfer properties of the nanofluid.We have considered frictional loss characteristics that increases the flow of the fluid with Reynolds numbers varying from 100-2000 is compared.A baseline modeling is established using the methodology analysis for the fluid flow over a rectangular chamber that is designed in the form of a square duct of ratio 1:1. The analysis is carried out over the heat transfer and flow rate characteristics of the nanofluid that converges into the square ducts with different aspect ratio, is analyzed.The concentration of the nano fluid is maintained at the constant rate, which is used for studying the flow rate influence over different aspect ratios. The thermal and flow characteristics is analyzed in such situation and validated against other literatures to check the efficiency in the converging rectangular oxygen free copper channel.The simulation results shows an increase in temperature on the duct out and drop in temperature on the inlet walls of the tube.The pressure changes and shear stress along the walls of the chamber is not much noticed and it is constant throughout the entire chamber.

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Hatamie, Shadie, Farzaneh Mohamadyar-Toupkanlou, Samaneh Mirzaei, et al. "Cellulose Acetate/Magnetic Graphene Nanofiber in Enhanced Human Mesenchymal Stem Cells Osteogenic Differentiation Under Alternative Current Magnetic Field." SPIN 09, no. 02 (2019): 1940011. http://dx.doi.org/10.1142/s2010324719400113.

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The three-dimensional (3D) nano scaffold of the cellulose acetate (CA) containing graphene/cobalt nanocomposite (0.1[Formula: see text]wt.%) was fabricated via electrospinning technique, and its impact on bone regeneration was investigated. Through this aim, bone marrow mesenchymal stem cells are cultured on the CA, and graphene/cobalt (rGO/Co)/CA nanocomposite scaffold surfaces and the samples are treated under low frequency alternative magnetic field (75[Formula: see text]Hz). The scaffolds are characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and thermal studies (TG/DSC). The proliferation behavior of stem cells on CA, and rGO/Co/CA nano scaffolds are studied by MTT assay, show their biocompability after 14 days of cell seeding. The 6-diamidino-2-phenylindole (DAPI) staining is used to confirm the morality of stem cell for duration of seven days. The nanocomposite scaffold is enhanced for extremely higher proliferation compared to the bare CA scaffold. The acceleration on osteogenic differentiation on the bone mesenchymal stem cell is enhanced within 48[Formula: see text]h when rGO/Co/CA scaffold is placed under alternative current magnetic field (ACMF). Furthermore, the acceleration of the stem cells differentiation for the rGO/Co/CA scaffold under ACMF corresponds to the induced scaffold surface roughness caused by graphene sheets, the metallic behavior of graphene and the responding of the nanocomposite magnetic parts (i.e., cobalt nanoparticles) while applying 75[Formula: see text]Hz frequency. Using reverse transcription polymerase chain reaction (RT-PCR) analysis, the superior effect of ACMF on scaffold contain magnetic graphene nanocomposite is confirmed to produce bone related genes within 14 days.

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Chun, C. M., A. Navrotsky, and I. A. Aksay. "Aggregation growth of nanometer-sized BaTiO3 particles." Proceedings, annual meeting, Electron Microscopy Society of America 53 (August 13, 1995): 188–89. http://dx.doi.org/10.1017/s0424820100137318.

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Nanocrystalline BaTiO3 particles are synthesized under hydrothermal conditions by the reaction of nanosized TiO2 colloids with aqueous solutions of Ba(OH)2 at 80°C. A dissolution-precipitation mechanism is proposed for the formation of BaTiOs by this route, because suspended TiO2 nano-particles dissolve into Ba(OH)2 solution, supersaturate the solution phase, and subsequently precipitate BaTiOs particles. The origin of the rough "raspberry-like" BaTiOs particles during growth stages can be explained by one of two mechanisms: (i) the morphological instability at the growth front during continuous growth, or (ii) aggregation of colloidal particles by multiple clustering. Our TEM studies on samples prepared by controlled seeding experiments show that a multiplicity of low or high angle grain boundaries occur during growth, supporting the aggregation growth.In order to separate the nucleation step from the growth step more efficiently, seed BaTiO3 particles were prepared by adding TiO2 colloids (Degussa, P-25) to 2.23 M Ba(OH)2 solution and hydrothermally reacting at 80°C under atmospheric pressure for 48 hours in polyethylene bottles. The resulting seed particles were recovered by centrifugation, rinsed with C02-free deionized water and freeze-dried.

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46

Guieu, C., F. Dulac, K. Desboeufs, et al. "Large clean mesocosms and simulated dust deposition: a new methodology to investigate responses of marine oligotrophic ecosystems to atmospheric inputs." Biogeosciences 7, no. 9 (2010): 2765–84. http://dx.doi.org/10.5194/bg-7-2765-2010.

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Abstract. Intense Saharan dust deposition occurs over large oligotrophic areas in the Mediterranean Sea and in the Tropical Atlantic, and its impact on the biogeochemical functioning of such oligotrophic ecosystems needs to be understood. However, due to the logistical difficulties of investigating in situ natural dust events, and due to the inherent limitations of microcosm laboratory experiments, new experimental approaches need to be developed. In this paper, we present a new experimental setup based on large, clean mesocoms deployed in the frame of the DUNE (a DUst experiment in a low-Nutrient, low-chlorophyll Ecosystem) project. We demonstrate that these tools are highly relevant and provide a powerful new strategy to in situ studies of the response of an oligotrophic ecosystem to chemical forcing by atmospheric deposition of African dust. First, we describe how to cope with the large amount of dust aerosol needed to conduct the seeding experiments by producing an analogue from soil collected in a source area and by performing subsequent appropriate physico-chemical treatments in the laboratory, including an eventual processing by simulated cloud water. The comparison of the physico-chemical characteristics of produced dust analogues with the literature confirms that our experimental simulations are representative of dust, aging during atmospheric transport, and subsequent deposition to the Mediterranean. Second, we demonstrate the feasibility in coastal areas to installing, in situ, a series of large (6 × 52 m3) mesocosms without perturbing the local ecosystem. The setup, containing no metallic parts and with the least possible induced perturbation during the sampling sequence, provides an approach for working with the required conditions for biogeochemical studies in oligotrophic environments, where nutrient and micronutrients are at nano- or subnano-molar levels. Two, distinct "seeding experiments" were conducted by deploying three mesocosms serving as controls (CONTROLS-Meso = no addition) and three mesocosms seeded with the same amount of Saharan dust (DUST-Meso = 10 g m−2 of sprayed dust). A large panel of biogeochemical parameters was measured at 0.1 m, at 5 m and 10 m in all of the mesocosms and at a selected site outside the mesocosms before seeding and at regular intervals afterward. Statistical analyses of the results show that data from three mesocosms that received the same treatment are highly reproducible (variability < 30%) and that there is no significant difference between data obtained from CONTROLS-Meso and data obtained outside the mesocosms. This paper demonstrates that the methodology developed in the DUNE project is suitable to quantifying and parameterizing the impact of atmospheric chemical forcing in a low-nutrient, low-chlorophyll (LNLC) ecosystem. Such large mesocosms can be considered as 1-D ecosystems so that the parameterization obtained from these experiments can be integrated into ecosystem models.

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Guieu, C., F. Dulac, K. Desboeufs, et al. "Large clean mesocosms and simulated dust deposition: a new methodology to investigate responses of marine oligotrophic ecosystems to atmospheric inputs." Biogeosciences Discussions 7, no. 2 (2010): 2681–738. http://dx.doi.org/10.5194/bgd-7-2681-2010.

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Abstract. Intense Saharan dust deposition occurs over large oligotrophic areas in the Mediterranean Sea and the Tropical Atlantic and its impact on the biogeochemical functioning of such oligotrophic ecosystems needs to be understood. However, due to the logistical difficulties to investigate in-situ natural dust events and due to the inherent limitations of microcosm laboratory experiments, new experimental approaches need to be developed. In this paper, we present a new experimental set up based on large clean mesocoms deployed in the frame of the DUNE (a DUst experiment in a low-Nutrient, low-chlorophyll Ecosystem) project. We demonstrate that these tools are highly relevant and provide a powerful new strategy to in situ study the response of an oligotrophic ecosystem to chemical forcing by atmospheric deposition of African dust. First, we describe how to cope with the large amount of dust aerosol needed to conduct the seeding experiments, by producing an analogue from soil collection in a source area and performing subsequent appropriate physico-chemical treatment in the laboratory including an eventual processing by simulated cloud water. The comparison of physico-chemical characteristics of produced dust analogues with the literature confirms that our experimental simulations are representative of dust, ageing during atmospheric transport, and subsequent deposition to the Mediterranean. Second, we demonstrate the feasibility in coastal area to installing in situ, a series of large (6×52 m3) mesocosms without perturbing the local ecosystem. All the setup, containing no metallic part and with as less as possible induced perturbation during the sampling sequence, allows working with the required conditions for biogeochemical studies in oligotrophic environments where nutrient and micronutrients are at nano- or subnano-molar levels. Two distinct "seeding experiments" were conducted by deploying mesocosms in triplicates: three mesocosms serving as controls (CONTROLS-Meso = no addition) and three mesocosms being seeded with the same amount of Saharan dust (DUST-Meso = 10 g m2 of sprayed dust). A large panel of biogeochemical parameters was measured at 0.1 m, at 5 m and 10 m in all the mesocosms and at a selected site outside the mesocosms, before the seeding and at regular intervals after. Statistical analyses of the results show that data from triplicate mesocosms are highly reproducible (variability <30% among triplicates) and that there is no significant difference between data obtained from CONTROLS-Meso and from outside the mesocosms. This paper demonstrates that the methodology developed in the DUNE project is suitable to quantify and parameterize the impact of atmospheric chemical forcing to a low-nutrient, low-chlorophyll (LNLC) ecosystem. Such large mesocosms can be considered as 1D ecosystem so that the parameterization obtained from those experiments can indeed be integrated into ecosystem models.

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48

Hosseinnejad, Fatemeh, Abbas Ali Imani Fooladi, Forough Hafezi, Soroush Mohit Mafi, Afsaneh Amiri, and Mohammad Reza Nourani. "Modelling and Tissue Engineering of Three Layers of Calvarial Bone as a Biomimetic Scaffold." Journal of Biomimetics, Biomaterials and Tissue Engineering 15 (October 2012): 37–53. http://dx.doi.org/10.4028/www.scientific.net/jbbte.15.37.

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In this Study, a New Zealand Rabbit Parietal Bone Was Cross-Sectioned, and Parameters such as Entire Thickness and the Thicknesses of the Compact and Spongy Tables Were Morphometrically Measured by Imagej Software. the Pore Size of the Cancellous Table Was Also Analysed, and a Calvarial Bone Model Was Created. Based upon a Natural Model for Bone Repair, a Nano-Structured Scaffold Was Designed Using Bioglass and Gelatin (BG) as its Main Components. the Scaffold Was Prepared Using Layer Solvent Casting Combined with Freeze-Drying, Layering Techniques, and other Commonly Used Techniques. the Fabricated BG Scaffolds Were Made with Different Percentages of Nanoparticles, and the 10% and 30% Constructions Were Found to Be Respectively Similar to Compact and Spongy Bone. we Fabricated Three Lamellar Scaffolds with Two Compact Layers on the outside and One Spongy Layer in the Middle to Mimic the Composition and Structure of Natural Bone. the Chemical, Physical, and Biological Tests (including Cell Seeding on Scaffold and MTT Assay) that Evaluated this Scaffold Examined its Capacity to Promote Bone Repair. Fabricated Scaffolds Implanted in Rabbit Calvaria and Evaluated the Bone Repair by X-Ray. this Mimetic BG Scaffold Could Be an Excellent Candidate for a Synthetic Calvarial Bone Graft.

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Paknameh, Navid, Shohreh Fatemi та Marjan Razavian. "EPD method of seeding nano ZnO followed by CVD of organo-linker; a step by step method for synthesis of ZIF-8 thin layer on tubular α-alumina". Materials Chemistry and Physics 235 (вересень 2019): 121764. http://dx.doi.org/10.1016/j.matchemphys.2019.121764.

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50

Mao, Xi, Chen-Ling Chu, Zhao Mao, and Jian-Jun Wang. "The development and identification of constructing tissue engineered bone by seeding osteoblasts from differentiated rat marrow stromal stem cells onto three-dimensional porous nano-hydroxylapatite bone matrix in vitro." Tissue and Cell 37, no. 5 (2005): 349–57. http://dx.doi.org/10.1016/j.tice.2005.05.003.

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