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Journal articles on the topic 'Nanoparticle formation'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 September 2023

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1

Shannahan, Jonathan. "The biocorona: a challenge for the biomedical application of nanoparticles." Nanotechnology Reviews 6, no. 4 (August 28, 2017): 345–53. http://dx.doi.org/10.1515/ntrev-2016-0098.

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AbstractFormation of the biocorona on the surface of nanoparticles is a significant obstacle for the development of safe and effective nanotechnologies, especially for nanoparticles with biomedical applications. Following introduction into a biological environment, nanoparticles are rapidly coated with biomolecules resulting in formation of the nanoparticle-biocorona. The addition of these biomolecules alters the nanoparticle’s physicochemical characteristics, functionality, biodistribution, and toxicity. To synthesize effective nanotherapeutics and to more fully understand possible toxicity f

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Karim, Mohammad Ziaul, Md Eaqub Ali, and Sharifah Bee Abd Hamid. "Temperature Induced Formation of Goethite from Magnetite." Advanced Materials Research 1109 (June 2015): 191–94. http://dx.doi.org/10.4028/www.scientific.net/amr.1109.191.

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Over the past few decades, magnetite nanoparticle has been profusely because of their wide range of applications. The co-precipitation method is the simplest and suitable method for the preparation of this nanoparticle. It goes through several reaction steps for the formation of various phases of magnetic nanoparticles. Goethite (FeO(OH)), is one of the intermediates, and it drastically suppressed with the magnetic properties of the Fe oxide phase. In our study, it was shown that at 30°C temperature pure magnetic nanoparticles is formed. But when precipitation temperature is increase to 80°C,

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SOBHAN, M. A., M. AMS, M. J. WITHFORD, and E. M. GOLDYS. "FORMATION OF COLLOIDAL GOLD NANOPARTICLES BY USING FEMTOSECOND LASER ABLATION." International Journal of Nanoscience 08, no. 01n02 (February 2009): 209–12. http://dx.doi.org/10.1142/s0219581x09005712.

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Colloidal gold nanoparticles were produced by irradiating a gold disc with a femtosecond laser beam in pure deionized water. Variation of laser fluence between 38 and 330 J/cm2 was used to control the nanoparticle size distribution. The nanoparticles produced were spherically shaped with average diameter between 9 and 10 nm. The effect of ablation time on the nanoparticle production efficiency and size distribution was also studied.

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Fomenko, Elena, Igor Altman, and Igor E. Agranovski. "Effect of External Charging on Nanoparticle Formation in a Flame." Materials 14, no. 11 (May 28, 2021): 2891. http://dx.doi.org/10.3390/ma14112891.

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This paper attempts to demonstrate the importance of the nanoparticle charge in the synthesis flame, for the mechanism of their evolution during formation processes. An investigation was made of MgO nanoparticles formed during combustion of magnesium particles. The cubic shape of nanoparticles in an unaffected flame allows for direct interpretation of results on the external flame charging, using a continuous unipolar emission of ions. It was found that the emission of negative ions applied to the flame strongly affects the nanoparticle shape, while the positive ions do not lead to any noticea

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Ahmadi, R., Madaah Hosseini, and A. Masoudi. "Avrami behavior of magnetite nanoparticles formation in co-precipitation process." Journal of Mining and Metallurgy, Section B: Metallurgy 47, no. 2 (2011): 211–18. http://dx.doi.org/10.2298/jmmb110330010a.

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In this work, magnetite nanoparticles (mean particle size about 20 nm) were synthesized via coprecipitation method. In order to investigate the kinetics of nanoparticle formation, variation in the amount of reactants within the process was measured using pH-meter and atomic absorption spectroscopy (AAS) instruments. Results show that nanoparticle formation behavior can be described by Avrami equations. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) were performed to study the chemical and morphological characterization of nanoparticles. Some simplifying assumptions were emp

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Majerič, Peter, and Rebeka Rudolf. "Advances in Ultrasonic Spray Pyrolysis Processing of Noble Metal Nanoparticles—Review." Materials 13, no. 16 (August 7, 2020): 3485. http://dx.doi.org/10.3390/ma13163485.

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In the field of synthesis and processing of noble metal nanoparticles, the study of the bottom-up method, called Ultrasonic Spray Pyrolysis (USP), is becoming increasingly important. This review analyses briefly the features of USP, to underline the physical, chemical and technological characteristics for producing nanoparticles and nanoparticle composites with Au and Ag. The main aim is to understand USP parameters, which are responsible for nanoparticle formation. There are two nanoparticle formation mechanisms in USP: Droplet-To-Particle (DTP) and Gas-To-Particle (GTP). This review shows ho

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Sidorova, Elena N., Ella L. Dzidziguri, Yulia P. Vinichenko, Dmitriy Yu Ozherelkov, Alexander S. Shinkaryov, Alexander A. Gromov, and Anton Yu Nalivaiko. "Metal Nanoparticles Formation from Nickel Hydroxide." Materials 13, no. 20 (October 21, 2020): 4689. http://dx.doi.org/10.3390/ma13204689.

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In this study, the mechanism of nickel nanoparticle formation from its hydroxide was analyzed. Metallic nickel nanoparticles were obtained through the hydroxide’s reduction under hydrogen. Nickel hydroxides were produced from nickel (II) nitrate hexahydrate and NaOH by deposition under various initial conditions. The influence of washing treatment on the dispersion of obtained nickel powders was studied. The washing procedure of precipitates was carried out by centrifugation, ultrasonic treatment, and decantation. X-ray diffractometry, transmission electron microscopy, low-temperature nitrogen

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Wang, Kun, Yuqing Zhang, Lincun Jiang, Zhiyuan Li, Xin Wang, Jinwei Zhai, and Siao Zhang. "Understanding the effect of ambient gas pressure on the nanoparticle formation in electrically exploding wires." Physics of Plasmas 30, no. 3 (March 2023): 033511. http://dx.doi.org/10.1063/5.0120712.

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In this paper, a computational model characterizing the preparation of metallic nanoparticles by electrically exploding wires from the onset of current flowing through the wire to the final moment of nanoparticle formation in a gaseous environment is constructed. The computational model consists of a 1D magnetohydrodynamic model, a simplified magnetohydrodynamic model with two-temperature approximation, and a set of general dynamic equations based on the nodal approach, corresponding to the phase transition stage, plasma evolution stage, and nanoparticle growth stage, respectively. The numeric

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9

Borchardt, John K. "Controlling nanoparticle formation." Materials Today 8, no. 6 (June 2005): 15. http://dx.doi.org/10.1016/s1369-7021(05)70927-5.

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10

Lee, Hwankyu. "Molecular Modeling of Protein Corona Formation and Its Interactions with Nanoparticles and Cell Membranes for Nanomedicine Applications." Pharmaceutics 13, no. 5 (April 29, 2021): 637. http://dx.doi.org/10.3390/pharmaceutics13050637.

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The conformations and surface properties of nanoparticles have been modified to improve the efficiency of drug delivery. However, when nanoparticles flow through the bloodstream, they interact with various plasma proteins, leading to the formation of protein layers on the nanoparticle surface, called protein corona. Experiments have shown that protein corona modulates nanoparticle size, shape, and surface properties and, thus, influence the aggregation of nanoparticles and their interactions with cell membranes, which can increases or decreases the delivery efficiency. To complement these expe

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Borgatta, Jaya R., Christian A. Lochbaum, Wade H. Elmer, Jason C. White, Joel A. Pedersen, and Robert J. Hamers. "Biomolecular corona formation on CuO nanoparticles in plant xylem fluid." Environmental Science: Nano 8, no. 4 (2021): 1067–80. http://dx.doi.org/10.1039/d1en00140j.

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12

Westmeier, Dana, Djamschid Solouk-Saran, Cecilia Vallet, Svenja Siemer, Dominic Docter, Hermann Götz, Linda Männ, et al. "Nanoparticle decoration impacts airborne fungal pathobiology." Proceedings of the National Academy of Sciences 115, no. 27 (June 20, 2018): 7087–92. http://dx.doi.org/10.1073/pnas.1804542115.

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Airborne fungal pathogens, predominantly Aspergillus fumigatus, can cause severe respiratory tract diseases. Here we show that in environments, fungal spores can already be decorated with nanoparticles. Using representative controlled nanoparticle models, we demonstrate that various nanoparticles, but not microparticles, rapidly and stably associate with spores, without specific functionalization. Nanoparticle-spore complex formation was enhanced by small nanoparticle size rather than by material, charge, or “stealth” modifications and was concentration-dependently reduced by the formation of

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13

Yang, Wen, Lin Wang, Evan M. Mettenbrink, Paul L. DeAngelis, and Stefan Wilhelm. "Nanoparticle Toxicology." Annual Review of Pharmacology and Toxicology 61, no. 1 (January 6, 2021): 269–89. http://dx.doi.org/10.1146/annurev-pharmtox-032320-110338.

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Nanoparticles from natural and anthropogenic sources are abundant in the environment, thus human exposure to nanoparticles is inevitable. Due to this constant exposure, it is critically important to understand the potential acute and chronic adverse effects that nanoparticles may cause to humans. In this review, we explore and highlight the current state of nanotoxicology research with a focus on mechanistic understanding of nanoparticle toxicity at organ, tissue, cell, and biomolecular levels. We discuss nanotoxicity mechanisms, including generation of reactive oxygen species, nanoparticle di

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Bremmer, G. Marien, Eirini Zacharaki, Anja O. Sjåstad, Violeta Navarro, Joost W. M. Frenken, and Patricia J. Kooyman. "In situ TEM observation of the Boudouard reaction: multi-layered graphene formation from CO on cobalt nanoparticles at atmospheric pressure." Faraday Discussions 197 (2017): 337–51. http://dx.doi.org/10.1039/c6fd00185h.

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Using a MEMS nanoreactor in combination with a specially designed in situ Transmission Electron Microscope (TEM) holder and gas supply system, we imaged the formation of multiple layers of graphene encapsulating a cobalt nanoparticle, at 1 bar CO : N<sub>2</sub> (1 : 1) and 500 °C. The cobalt nanoparticle was imaged live in a TEM during the Boudouard reaction. The in situ/operando TEM studies give insight into the behaviour of the catalyst at the nanometer-scale, under industrially relevant conditions. When switching from Fischer–Tropsch syngas conditions (CO : H<sub>2</sub> : N<sub>2</sub> 1

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Dhar, Sunandan, Vishesh Sood, Garima Lohiya, Harini Deivendran, and Dhirendra S. Katti. "Role of Physicochemical Properties of Protein in Modulating the Nanoparticle-Bio Interface." Journal of Biomedical Nanotechnology 16, no. 8 (August 1, 2020): 1276–95. http://dx.doi.org/10.1166/jbn.2020.2958.

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Nanoparticles, on exposure to the biological milieu, tend to interact with macromolecules to form a biomolecular corona. The biomolecular corona confers a unique biological identity to nanoparticles, and its protein composition plays a deterministic role in the biological fate of nanoparticles. The physiological behavior of proteins stems from their physicochemical properties, including surface charge, hydrophobicity, and structural stability. However, there is insufficient understanding about the role of physicochemical properties of proteins in biomolecular corona formation. We hypothesized

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Saif Hasan, Syed, Sanjay Singh, Rasesh Y. Parikh, Mahesh S. Dharne, Milind S. Patole, B. L. V. Prasad, and Yogesh S. Shouche. "Bacterial Synthesis of Copper/Copper Oxide Nanoparticles." Journal of Nanoscience and Nanotechnology 8, no. 6 (June 1, 2008): 3191–96. http://dx.doi.org/10.1166/jnn.2008.095.

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A bacterial mediated synthesis of copper/copper oxide nanoparticle composite is reported. A Gram-negative bacterium belonging to the genus Serratia was isolated from the midgut of Stibara sp., an insect of the Cerambycidae family of beetles found in the Northwestern Ghats of India. This is a unique bacterium that is quite specific for the synthesis of copper oxide nanoparticles as several other strains isolated from the same insect and common Indian mosquitoes did not result in nanoparticle formation. By following the reaction systematically, we could delineate that the nanoparticle formation

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Landry, Markita P. "Protein Corona Formation on Hard and Polymeric Nanoparticles – Towards Understanding Biocompatibility, Biodistribution, and Efficacy." ECS Meeting Abstracts MA2022-01, no. 8 (July 7, 2022): 707. http://dx.doi.org/10.1149/ma2022-018707mtgabs.

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Unpredictable protein adsorption on both hard and soft nanoparticles remains a considerable challenge towards effectively applying nanotechnologies in biological environments. Hard nanoparticles form the basis of many chemical nanosensors. Conversely, soft nanoparticles such as lipid nanoparticles (LNPs) are vital for the successful delivery of mRNA-based vaccines, and offer promising applications in neonatal gene therapy, immunotherapy, and protein replacement therapy. Understanding the biological interactions that both hard and soft nanoparticles undergo upon introduction into biological sys

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18

Carpenter, Chris. "Surface-Modified Nanoparticle Gelled-Acid System Stimulates Without Formation Damage." Journal of Petroleum Technology 74, no. 06 (June 1, 2022): 64–66. http://dx.doi.org/10.2118/0622-0064-jpt.

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This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper IPTC 22443, “Surface-Modified Nanoparticle-Based Novel Gelled-Acid System: A Unique Formation-Damage-Free Well-Stimulation Technology,” by Rajendra Kalgaonkar, SPE, and Nour Baqader, SPE, Saudi Aramco. The paper has not been peer reviewed. Copyright 2022 International Petroleum Technology Conference. Reproduced by permission. Gelled-acid systems based on the gelation of hydrochloric acid (HCl) are used extensively in both matrix and fracture acidizing to prevent acidizing-fluid leakoff. However, these

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19

LIU, JIN-KU, YI LU, XIAO-JUN HU, and JIN MU. "FACILE SYNTHESIS OF COPPER NANOPARTICLE CHAINS." Nano 02, no. 01 (February 2007): 31–34. http://dx.doi.org/10.1142/s1793292007000337.

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The copper nanoparticle chains have been synthesized through a self-assembly process with sodium polymethacylic acid as the template. The resulted nanoparticle chains were 0.8–1.5 μm long, and the composed nanoparticles were about 30 nm in diameter. The self-assembly formation mechanism has been proposed.

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20

Tien, Der-Chi, Liang-Chia Chen, Nguyen Van Thai, and Sana Ashraf. "Study of Ag and Au Nanoparticles Synthesized by Arc Discharge in Deionized Water." Journal of Nanomaterials 2010 (2010): 1–9. http://dx.doi.org/10.1155/2010/634757.

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The paper presents a study of Ag and Au nanofluids synthesized by the arc discharge method (ADM) in deionized water. The metallic Ag nanoparticle (Ag0) and ionic Ag (Ag+) have played an important role in the battle against germs which are becoming more drug-resistant every year. Our study indicates that Ag nanoparticle suspension (SNPS) fabricated by using ADM without added surfactants exclusively contains the metallic Ag nanoparticle and ionic Ag. Besides that, the ADM in deionized water has also been employed for the fabrication process of Au nanoparticles. The experimental results indicate

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21

Du, H., and F. Yu. "Nanoparticle formation in the exhaust of vehicles running on ultra-low sulfur fuel." Atmospheric Chemistry and Physics 8, no. 16 (August 18, 2008): 4729–39. http://dx.doi.org/10.5194/acp-8-4729-2008.

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Abstract. The concern of adverse health impacts from exposure to vehicle-emitted nanoparticles has been escalating over the past few years. In order to meet more stringent EPA emission standards for particle mass emissions, advanced exhaust after-treatment systems such as continuously regenerating diesel particle filters (CRDPFs) have to be employed on vehicles and fuel with ultra-low sulfur is to be used. Although CRDPFs were found to be effective in reducing particle mass emissions, they were revealed to increase the potential of volatile nanoparticle formation. Significant nanoparticle conc

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Bellotto, Ottavia, Maria C. Cringoli, Siglinda Perathoner, Paolo Fornasiero, and Silvia Marchesan. "Peptide Gelators to Template Inorganic Nanoparticle Formation." Gels 7, no. 1 (February 2, 2021): 14. http://dx.doi.org/10.3390/gels7010014.

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The use of peptides to template inorganic nanoparticle formation has attracted great interest as a green route to advance structures with innovative physicochemical properties for a variety of applications that range from biomedicine and sensing, to catalysis. In particular, short-peptide gelators offer the advantage of providing dynamic supramolecular environments for the templating effect on the formation of inorganic nanoparticles directly in the resulting gels, and ideally without using further reductants or chemical reagents. This mini-review describes the recent progress in the field to

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Sánchez M., J. F., H. A. Ritacco, and M. D. Sánchez. "FORMATION OF PALLADIUM NANOPARTICLES BY THE POLYOL METHOD:INFLUENCE OF ALKALINE CONDITIONS." Anales AFA 33, no. 4 (January 15, 2023): 103–11. http://dx.doi.org/10.31527/analesafa.2022.33.4.103.

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The effect of sodium hydroxide (NaOH) on the size of palladium (Pd) nanoparticles obtained by the simple polyol route was studied. Nanoparticles were synthesized at room temperature using palladium(II) chloride (PdCl2) and NaOH dissolved in ethylene glycol (EG) as reduction reaction promoters. No protective agents or stabilizers were used. We monitored the reaction kinetics and the growth of the nanoparticles by UV-vis spectroscopy and their crystallinity by powder X-ray diffraction (XRD) as a function of NaOH concentration. Crystallite size was evaluated from the diffraction pattern. We found

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Zinicovscaia, Inga, Liudmila Rudi, Ana Valuta, Liliana Cepoi, Konstantin Vergel, Marina V. Frontasyeva, Alexey Safonov, Markus Wells, and Dmitrii Grozdov. "Biochemical Changes in Nostoc linckia Associated with Selenium Nanoparticles Biosynthesis." Ecological Chemistry and Engineering S 23, no. 4 (December 1, 2016): 559–69. http://dx.doi.org/10.1515/eces-2016-0039.

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Abstract The cyanobacterium Nostoc linckia was used to study the biotechnology of selenium nanoparticles synthesis for the first time. The experimental conditions of the nanoparticle production by the studied cyanobacteria in aqueous cobalt selenite solutions were examined. Neutron activation analysis allowed characterization of the dynamics of accumulation of the total selenium quantity by Nostoc linckia. Scanning Electron Microscope images demonstrated extracellular formation of amorphous nanoparticles. Released selenium nanoparticles ranged in size from 10 to 80 nm. The changes of essential

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RAJASULOCHANA, P., R. DHAMOTHARAN, P. MURUGAKOOTHAN, S. MURUGESAN, and P. KRISHNAMOORTHY. "BIOSYNTHESIS AND CHARACTERIZATION OF GOLD NANOPARTICLES USING THE ALGA Kappaphycus alvarezii." International Journal of Nanoscience 09, no. 05 (October 2010): 511–16. http://dx.doi.org/10.1142/s0219581x10007149.

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As a part of our ongoing investigation into the use of algae for gold nanoparticle synthesis, we screened the marine alga Kappaphycus alvarezii, to investigate its efficiency to reduce gold ions as well as the formation of gold nanoparticles. In the present work, we report the reaction condition of the alga K. alvarezii with aqueous gold ions for gold nanoparticle synthesis within the biomass extracellularly. The formation of gold nanoparticles was characterized by UV–Vis spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), transmission electron mi

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Olarte-Plata, Juan D., Gøran Brekke-Svaland, and Fernando Bresme. "The influence of surface roughness on the adhesive interactions and phase behavior of suspensions of calcite nanoparticles." Nanoscale 12, no. 20 (2020): 11165–73. http://dx.doi.org/10.1039/d0nr00834f.

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Devi, S., B. Singh, A. K. Paul, and S. Tyagi. "Highly sensitive and selective detection of trinitrotoluene using cysteine-capped gold nanoparticles." Analytical Methods 8, no. 22 (2016): 4398–405. http://dx.doi.org/10.1039/c6ay01036a.

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(A) A schematic representation of the formation of cysteine capped gold nanoparticles and their interaction at pH 5 and 9.3. (B) A schematic representation of the formation of a Meisenheimer complex between cysteine modified gold nanoparticles and TNT, and possible cross-linking between gold nanoparticles bound to the Meisenheimer complex with gold nanoparticle bound cysteine.

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Antony, Elizabath, Mythili Sathiavelu, and Sathiavelu Arunachalam. "SYNTHESIS OF SILVER NANOPARTICLES FROM THE MEDICINAL PLANT BAUHINIA ACUMINATA AND BIOPHYTUM SENSITIVUM–A COMPARATIVE STUDY OF ITS BIOLOGICAL ACTIVITIES WITH PLANT EXTRACT." International Journal of Applied Pharmaceutics 9, no. 1 (December 31, 2016): 22. http://dx.doi.org/10.22159/ijap.2017v9i1.16277.

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Objective: The aim of current study was to synthesise silver nanoparticles from the leaf extracts (aqueous and methanol) of two medicinal plants Bauhinia acuminata and Biophytum sensitivum and to compare its biological activities with that of plant extract.Methods: Silver nanoparticles were synthesised, and it was characterised using UV-Visible spectroscopy and scanning electron microscope (SEM). Fourier transform infrared spectroscopy (FTIR) and GC-MS analysis were done for silver nanoparticle extract. The biological activities such as DPPH scavenging assay, haemolytic assay and antimicrobial

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Skountzos, Emmanuel N., Katerina S. Karadima, and Vlasis G. Mavrantzas. "Structure and Dynamics of Highly Attractive Polymer Nanocomposites in the Semi-Dilute Regime: The Role of Interfacial Domains and Bridging Chains." Polymers 13, no. 16 (August 16, 2021): 2749. http://dx.doi.org/10.3390/polym13162749.

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Detailed molecular dynamics (MD) simulations are employed to study how the presence of adsorbed domains and nanoparticle bridging chains affect the structural, conformational, thermodynamic, and dynamic properties of attractive polymer nanocomposite melts in the semi-dilute regime. As a model system we have chosen an unentangled poly(ethylene glycol) (PEG) matrix containing amorphous spherical silica nanoparticles with different diameters and at different concentrations. Emphasis is placed on properties such as the polymer mass density profile around nanoparticles, the compressibility of the s

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Schroer, Martin A., Alexander Levish, Yasin Yildizlar, Maximilian Stepponat, and Markus Winterer. "A versatile chemical vapor synthesis reactor for in situ x-ray scattering and spectroscopy." Review of Scientific Instruments 93, no. 11 (November 1, 2022): 113706. http://dx.doi.org/10.1063/5.0122461.

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We describe a versatile reactor system for chemical vapor synthesis of nanoparticles, which enables in situ investigations of high temperature gas phase particle formation and transformation processes by x-ray scattering and x-ray absorption spectroscopy. The system employs an inductively heated hot wall reactor as the energy source to start nanoparticle formation from a mixture of precursor vapor and oxygen. By use of a modular set of susceptor segments, it is especially possible to change solely the residence time of the gas mixture while keeping all other process parameters (temperature, ga

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Dehghan Hamedan, Ali, and Mohammad Shahmiri. "A new model for the solidification of metal matrix nanocomposites: Wet cluster engulfment of nanoparticles by the solidification front." Journal of Composite Materials 51, no. 20 (April 4, 2017): 2913–32. http://dx.doi.org/10.1177/0021998317701557.

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In this article, a new mechanism so-called wet cluster engulfment and the related formula were proposed to predict the critical solidification velocity for nanoparticles engulfment by a solidification front. According to the mechanism, the most important issue in the engulfing of the nanoparticles is the aggregation of nanoparticles, i.e. the formation of wet clusters in front of solidifying phase. In fact, local clustering of nanoparticles created highly viscous zones in the vicinity of the solidification front so that the nanoparticles and the liquid-filled spaces between them move as a unif

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Ishak, Mohamad Nizam, K. A. Yaacob, and Ahmad Fauzi Mohd Noor. "The Effect of Ligands on CdSe Nanoparticle Films Deposited by EPD." Advanced Materials Research 1087 (February 2015): 304–8. http://dx.doi.org/10.4028/www.scientific.net/amr.1087.304.

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Nanoparticle from group II-IV semiconductor nanoparticles is widely studied for solar cells. The ability to modify the surface of nanoparticle is significant to successful use in various applications. In this research, mercaptoundecionic acid (MUA) and trioctyl phosphine oxide (TOPO) were used as ligand for cadmium selenide (CdSe) nanoparticles. The wavelength shift to a shorter value observed due to decreasing size of CdSe nanoparticle after ligand exchange from TOPO to MUA. The electrophoretic deposition methods (EPD) have being employed to deposite CdSe nanoparticles films on fluorine doped

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LIAO, YUANBAO, JIAJIA WU, LING XU, FEI YANG, WENQING LIU, JUN XU, LIANGCAI WU, ZHONGYUAN MA, and KUNJI CHEN. "FORMATION, STRUCTURE AND PROPERTIES OF HIGHLY ORDERED SUB-30-nm PHASE CHANGE MATERIALS (GST) NANOPARTICLE ARRAYS." Surface Review and Letters 17, no. 04 (August 2010): 405–10. http://dx.doi.org/10.1142/s0218625x10014259.

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Chalcogenide phase change material Ge1Sb2Te4 (GST) nanoparticle arrays with long-range-order were fabricated by using a monolayer of self-assembled polystyrene (PS) spheres as mask. The morphology of nanoparticle arrays can be controlled via changing RIE processing conditions. Images of atomic force microscopy (AFM) and scanning electron microscopy (SEM) show that highly uniform GST nanoparticle arrays with particle density around 109 cm-2 were formed. The sizes of nanoparticles can be reduced to a tiny diameter in the range of 30–40 nm (top diameter). The GST nanoparticle arrays exhibit a pro

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Sutthavas, Pichaporn, Matthias Schumacher, Kai Zheng, Pamela Habibović, Aldo Roberto Boccaccini, and Sabine van Rijt. "Zn-Loaded and Calcium Phosphate-Coated Degradable Silica Nanoparticles Can Effectively Promote Osteogenesis in Human Mesenchymal Stem Cells." Nanomaterials 12, no. 17 (August 24, 2022): 2918. http://dx.doi.org/10.3390/nano12172918.

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Nanoparticles such as mesoporous bioactive glasses (MBGs) and mesoporous silica nanoparticles (MSN) are promising for use in bone regeneration applications due to their inherent bioactivity. Doping silica nanoparticles with bioinorganic ions could further enhance their biological performance. For example, zinc (Zn) is often used as an additive because it plays an important role in bone formation and development. Local delivery and dose control are important aspects of its therapeutic application. In this work, we investigated how Zn incorporation in MSN and MBG nanoparticles impacts their abil

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Song, Mun Seop, Chong Seung Yoon, and Young Ho Kim. "Cu Oxide Nanoparticle Formation: Effects of Curing Time." Materials Science Forum 475-479 (January 2005): 3555–58. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.3555.

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Cu oxide nanoparticles were formed by reacting with Polyamic acid (PAA) with Cu during imidization. In this paper, we investigated the effect of holding time during curing on the Cu oxide nanoparticle formation. Cu thin films were deposited on SiO2/Si substrates by thermal evaporation. Polyamic acid was then spin-coated on the Cu thin film. The polyamic acid films were soft-baked at 135°C for 30 minutes and thermally cured at 350°C with various holding time in a nitrogen atmosphere. The size of the Cu2O nanoparticles formed in the polyimide (PI) matrix increased as the holding time increased.

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Miyakawa, Masato, Norihito Hiyoshi, Masateru Nishioka, Hidekazu Koda, Koichi Sato, Akira Miyazawa, and Toshishige M. Suzuki. "Continuous syntheses of Pd@Pt and Cu@Ag core–shell nanoparticles using microwave-assisted core particle formation coupled with galvanic metal displacement." Nanoscale 6, no. 15 (2014): 8720–25. http://dx.doi.org/10.1039/c4nr00118d.

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Biehler, Erik, Qui Quach, Clay Huff, and Tarek M. Abdel-Fattah. "Organo-Nanocups Assist the Formation of Ultra-Small Palladium Nanoparticle Catalysts for Hydrogen Evolution Reaction." Materials 15, no. 7 (April 6, 2022): 2692. http://dx.doi.org/10.3390/ma15072692.

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Ultra-small palladium nanoparticles were synthesized and applied as catalysts for a hydrogen evolution reaction. The palladium metal precursor was produced via beta-cyclodextrin as organo-nanocup (ONC) capping agent to produce ultra-small nanoparticles used in this study. The produced ~3 nm nanoparticle catalyst was then characterized via X-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-Vis), and Fourier transform infrared spectroscopy (FTIR) to confirm the successful synthesis of ~3 nm palladium nanoparticles. The nanoparticles’ catalytic a

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Park, Hoon, H. S. Jie, Kyou Hyun Kim, Jae Pyong Ahn, and Jong Ku Park. "In-Situ TEM Observation on Phase Formation of TiO₂ Nanoparticle Synthesized by Flame Method." Materials Science Forum 534-536 (January 2007): 81–84. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.81.

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TiO2 nanoparticle was synthesized by the flame method using a metal organic precursor of titanium tetraisopropoxide (TTIP, Ti(OC3H7)4), which was controlled by varying the ratio and flow rate of gas mixtures consisting of oxygen (oxidizer), methane (fuel) and nitrogen (carrier gas). The morphology and the size distribution of nanoparticles were observed with TEM and FESEM, and the phase evolution was analyzed by XRD measurement using a monochromator. The crystalline phases of TiO2 nanoparticle depended strongly on the temperature distribution in the flame, whereas the morphology was not sensit

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Miyakawa, Masato, Norihito Hiyoshi, Hidekazu Koda, Kenichi Watanabe, Hideki Kunigami, Hiroshi Kunigami, Akira Miyazawa, and Masateru Nishioka. "Continuous syntheses of carbon-supported Pd and Pd@Pt core–shell nanoparticles using a flow-type single-mode microwave reactor." RSC Advances 10, no. 11 (2020): 6571–75. http://dx.doi.org/10.1039/c9ra10140c.

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Morga, M., Z. Adamczyk, and D. Kosior. "Silica nanoparticle monolayers on a macroion modified surface: formation mechanism and stability." Physical Chemistry Chemical Physics 19, no. 34 (2017): 22721–32. http://dx.doi.org/10.1039/c7cp03876c.

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Even though silica nanoparticles and their monolayers find a broad field of applications, only a few studies providing a quantitative description of silica nanoparticle deposition at solid/liquid interfaces have been reported in the literature.

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Lee, Jae Hoon, Shin Young Park, In-Gyu Choi, and Joon Weon Choi. "Investigation of Molecular Size Effect on the Formation of Lignin Nanoparticles by Nanoprecipitation." Applied Sciences 10, no. 14 (July 17, 2020): 4910. http://dx.doi.org/10.3390/app10144910.

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In recent years, several studies focused on the synthesis of lignin-based nanoparticle in aqueous solution and its potential applications of the drug carrier were investigated. In this study, soda lignin (SL) nanoparticles (i.d. 128–560 nm) were synthesized by the nanoprecipitation process at three different concentrations (1, 2, and 4 mg/mL THF) with various molecular sizes of soda lignin (NP-F1, NP-F2, and NP-F3) obtained from sequential solvent extraction. The average molecular weights of SL, F1, F2, F3, F4, and F5 were 3130, 1190, 2550, 3680, 5310, and 14,650, respectively. The average siz

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Yan, Jiwang, Zhiyu Zhang, and Tsunemoto Kuriyagawa. "Effect of Nanoparticle Lubrication in Diamond Turning of Reaction-Bonded SiC." International Journal of Automation Technology 5, no. 3 (May 5, 2011): 307–12. http://dx.doi.org/10.20965/ijat.2011.p0307.

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Lubrication is a key issue in diamond turning of hard materials. This paper explores the feasibility of nanoparticle lubrication in diamond turning of reaction-bonded SiC. Four types of nanoparticles were dispersed in lubricating grease and applied to a workpiece surface. Results showed that the type and concentration of dispersed nanoparticles significantly affected lubricating performance. Grease containing 10% Cu nanoparticles produced the highest surface quality and the lowest tool wear. Lubrication is discussed in terms of nanoparticle-induced solid lubricating film formation at the tool-

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Pászti, Zoltán, Zsolt E. Horváth, Gábor Pető, Albert Karacs, and L. Guczi. "Nanoparticle Formation during Laser Ablation." Solid State Phenomena 56 (August 1997): 207–12. http://dx.doi.org/10.4028/www.scientific.net/ssp.56.207.

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Tian, Fei, Lili Cai, Chao Liu, and Jiashu Sun. "Microfluidic technologies for nanoparticle formation." Lab on a Chip 22, no. 3 (2022): 512–29. http://dx.doi.org/10.1039/d1lc00812a.

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Olenin, A. Yu. "Mechanisms of metal nanoparticle formation." Nanotechnologies in Russia 7, no. 5-6 (May 2012): 238–42. http://dx.doi.org/10.1134/s1995078012030123.

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Matsunaga, Tadashi, and Haruko Takeyama. "Biomagnetic nanoparticle formation and application." Supramolecular Science 5, no. 3-4 (July 1998): 391–94. http://dx.doi.org/10.1016/s0968-5677(98)00037-6.

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Grand, J., S. R. Ferreira, V. de Waele, S. Mintova, and T. M. Nenoff. "Nanoparticle Alloy Formation by Radiolysis." Journal of Physical Chemistry C 122, no. 24 (May 25, 2018): 12573–88. http://dx.doi.org/10.1021/acs.jpcc.8b01878.

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Perrey, C. R., and C. B. Carter. "Insights into nanoparticle formation mechanisms." Journal of Materials Science 41, no. 9 (April 17, 2006): 2711–22. http://dx.doi.org/10.1007/s10853-006-7874-z.

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Scaiano, Juan C., José C. Netto-Ferreira, Emilio Alarcon, Paul Billone, Carlos J. Bueno Alejo, Charles-Oneil L. Crites, Matthew Decan, et al. "Tuning plasmon transitions and their applications in organic photochemistry." Pure and Applied Chemistry 83, no. 4 (March 14, 2011): 913–30. http://dx.doi.org/10.1351/pac-con-11-01-09.

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The ketone-photoinduced formation of Au, Ag, and Cu nanoparticles from their corresponding ions in solution has been carried out using benzoin photoinitiators. Ketones are good photosensitizers for nanoparticle synthesis not because of the energy they can absorb or deliver, but rather because of the reducing free radicals they can generate. Efficient photochemical nanoparticle generation thus requires a careful selection of substrates and experimental conditions such that free radical generation occurs with high quantum efficiency, where metal ion precursors do not inhibit radical formation. A

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Lee, Jae Hoon, Tae Min Kim, In-Gyu Choi, and Joon Weon Choi. "Phenolic Hydroxyl Groups in the Lignin Polymer Affect the Formation of Lignin Nanoparticles." Nanomaterials 11, no. 7 (July 9, 2021): 1790. http://dx.doi.org/10.3390/nano11071790.

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Alkaline soda lignin (AL) was sequentially fractionated into six fractions of different molecular size by means of solvent extraction and their phenolic hydroxyl groups were chemoselectively methylated to determine their effect on nanoparticle formation of lignin polymers. The effect of the lignin structure on the physical properties of nanoparticles was also clarified in this study. Nanoparticles were obtained from neat alkaline soda lignin (ALNP), solvent-extracted fractions (FALNPs, i.d. 414–1214 nm), and methylated lignins (MALNPs, i.d. 516–721 nm) via the nanoprecipitation method. Specifi

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