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Journal articles on the topic 'Nanoparticle size'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Li, Meng, Liqiang Lin, Ruyan Guo, Amar Bhalla, and Xiaowei Zeng. "Numerical investigation of size effects on mechanical behaviors of Fe nanoparticles through an atomistic field theory." Journal of Micromechanics and Molecular Physics 02, no. 03 (2017): 1750010. http://dx.doi.org/10.1142/s2424913017500102.

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At nanoscale, the mechanical response of nanoparticles is largely affected by the particle size. To assess the effects of nanoparticle size (e.g., nanoparticle’s volume, cross-sectional area and length) on mechanical behaviors of bcc Fe nanoparticles under compressive loading, an atomistic field theory was introduced in current study. In the theory, atomistic definitions and continuous local density functions of fundamental physical quantities were derived. Through the atomistic potential-based method, the mechanical responses of bcc Fe nanoparticles were analyzed in different sizes. The simul

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Bao, Lingling, Chaoyang Zhong, Pengfei Jie, and Yan Hou. "The effect of nanoparticle size and nanoparticle aggregation on the flow characteristics of nanofluids by molecular dynamics simulation." Advances in Mechanical Engineering 11, no. 11 (2019): 168781401988948. http://dx.doi.org/10.1177/1687814019889486.

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Molecular dynamics simulation is used to investigate the flow characteristics of Cu–Ar nanofluids considering the influence of nanoparticle size and nanoparticle aggregation. Nanofluids viscosity is calculated by equilibrium molecular dynamics based on Green–Kubo equation. Results demonstrate that the viscosity of nanofluids decreases with the increase of nanoparticle size. In addition, nanoparticle aggregation results in the increase of the nanofluids viscosity. Compared with nanoparticle size, nanoparticle aggregation has a larger impact on viscosity. Nanofluids flowing in parallel-plate nan

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Kim, Ji‐Hyun, Gil‐Suk Yang, Sanggeun Song, and Jaeyoung Sung. "Statistical Distribution of Laser‐induced Growth of Nanoparticles: Effects of Laser Intensity and Medium–Nanoparticles Interactions^#." Bulletin of the Korean Chemical Society 36, no. 3 (2015): 914–18. http://dx.doi.org/10.1002/bkcs.10171.

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We theoretically investigate the size distribution of nanoaggregates created by a laser‐induced monomer generation process, an example of which can be found in J. Phys. Chem. C 2008, 112, 10715. A simple analytic expression for the most probable size distribution of nanoparticles is obtained by considering statistical ensemble of nanoparticles with various sizes. When effects of the surface interaction and the defect degeneracy of the nanoparticle are negligible, the most probable size distribution of nanoparticles is given by the exponentially decaying function of the nanoparticle size. The p

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Venkateswara Rao, S., E. Anuhya, and K. Padmalatha. "Nanoparticles: A smart drug delivery." Journal of Drug Delivery and Therapeutics 9, no. 2-s (2019): 590–93. http://dx.doi.org/10.22270/jddt.v9i2-s.2500.

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In recent years, there has been an exponential interest in the development of novel drug delivery systems using nanoparticles. Nanoparticles are defined as particulate dispersions or solid particles with size in the range of 10-1000nm. There has been a considerable research interest in the area of drug delivery using particulate delivery systems as carriers for small and large molecules. Particulate systems like nanoparticles have been used as a physical approach to alter and improve the pharmacokinetic and pharmacodynamic properties of various types of drug molecules. Nanoparticles have been

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Xu, Wu, Xuheng Liu, and Xiaohu Liu. "Effects of nanoparticle size and shape in clathrin-mediated endocytosis." Journal of Applied Physics 131, no. 13 (2022): 134701. http://dx.doi.org/10.1063/5.0081267.

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Nanoparticles have been extensively adopted to deliver therapeutic drug molecules to cells through clathrin-mediated endocytosis (CME). The size and shape of nanoparticles are important factors in the design of a drug delivery system. Both the clathrin coat and actin force induce the bending of the membrane during CME. However, due to the complex coupled effects of size, shape, and surface properties, nanoparticle shape effects are difficult to elucidate through experiments. Herein, we establish a comprehensive framework considering both the actin force and the dynamic assembly of the clathrin

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Shumaila, Arshad* Ayesha Naseer Maryam Sharif. "NANOPARTICLES; A Review." IAJPS, CSK PUBLICATIONS 03, no. 11 (2016): 1389–95. https://doi.org/10.5281/zenodo.208175.

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Nanotechnology is related to design characterization, production and applications of structures, devices and systems by controlling shape and size at nanometer scale. Nanoparticles can be prepared from a variety of materials such as proteins, polysaccharides and synthetic polymers .Synthesis of nanoparticle done by different methods such as gas condestation vacuum, deposition and vaporization and other methods are involved. The Zeta potential of a nanoparticle is commonly used to characterized the surface charge property of nanoparticles. Particle size determines the in vivo distribution, biol

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Wang, Shenqing, Xiliang Yan, Gaoxing Su, and Bing Yan. "Cytotoxicity Induction by the Oxidative Reactivity of Nanoparticles Revealed by a Combinatorial GNP Library with Diverse Redox Properties." Molecules 26, no. 12 (2021): 3630. http://dx.doi.org/10.3390/molecules26123630.

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It is crucial to establish relationship between nanoparticle structures (or properties) and nanotoxicity. Previous investigations have shown that a nanoparticle’s size, shape, surface and core materials all impact its toxicity. However, the relationship between the redox property of nanoparticles and their toxicity has not been established when all other nanoparticle properties are identical. Here, by synthesizing an 80-membered combinatorial gold nanoparticle (GNP) library with diverse redox properties, we systematically explored this causal relationship. The compelling results revealed that

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Lavagna, Enrico, Jonathan Barnoud, Giulia Rossi, and Luca Monticelli. "Size-dependent aggregation of hydrophobic nanoparticles in lipid membranes." Nanoscale 12, no. 17 (2020): 9452–61. http://dx.doi.org/10.1039/d0nr00868k.

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Ningrum, Wulan Agustin, W. Wirasti, Yulian Wahyu Permadi, and Fida Faiqatul Himmah. "Uji Sediaan Lotion Nanopartikel Ekstrak Terong Belanda Sebagai Antioksidan." Jurnal Ilmiah Kesehatan 14, no. 1 (2021): 99. http://dx.doi.org/10.48144/jiks.v14i1.539.

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Abstrak. Nanopartikel adalah suatu teknologi formulasi suatu partikel yang terdispersi pada ukuran nanometer atau skala per seribu mikron. Tujuan penelitian ini adalah membuat sediaan lotion dari nanopartikel ekstrak terong belanda sebagai antioksidan. Teknologi nanopartikel ekstrak terong belanda mempunyai efek yang sangat baik sebagai antioksidan, sehingga dimungkinkan dibuat sediaan sebagai bahan kosmetik Penelitian ini menguji nanopertikel ekstrak terong belanda sebagai antioksidan sediaan lotion. Metode ekstraksi yang digunakan dalam penelitian ini adalah maserasi menggunakan pelarut meta

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Che Mohamed Hussein, Siti Nurliyana, Aqilah Dollah, Mohamad Firdaus Mohamad Salleh, Nur Hidayati Othman, Azzah Nazihah Che Abdul Rahim, and Nur Shuhadah Japperi. "Synthesis of ZnO Nanoparticles for Wax Deposition Control and Oil Upgrading: Effect of Ratio of Zinc Acetate Dihydrate to Oxalic Acid Dihydrate." Key Engineering Materials 797 (March 2019): 411–20. http://dx.doi.org/10.4028/www.scientific.net/kem.797.411.

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In the current paper, fundamental aspects of heavy oil and wax deposition problems are defined. Wax or in another term is cloud point occur when the oil starts to precipitate. When it’s started to precipitate, it can cause major problem to industry of oil and gas. In this study, ZnO nanoparticles were chosen to study the effect of varying molar ratio from 1:1, 1:2, 1:3 to the morphology and size of the nanoparticle. The structures and properties were recognized with energy dispersive X-ray (EDX), field emission scanning electron microscopy (FE-SEM), and X-ray diffraction (XRD) methods. EDX and

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Rahmadani, Dewi, Sumiati Side, and Suriati Eka Putri. "Pengaruh Penambahan PVA terhadap Ukuran Nanopartikel Perak Hasil Sintesis Menggunakan Bioreduktor Ekstrak Daun Sirsak (Annona muricata L.)." Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam 9, no. 1 (2020): 1. http://dx.doi.org/10.35580/sainsmat91141862020.

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Penelitian ini bertujuan untuk menentukan pengaruh penambahan Polivinil Alkohol (PVA) terhadap ukuran nanopartikel perak hasil sintesis menggunakan bioreduktor ekstrak daun sirsak (Annona muricata L.). Nanopartikel perak dibuat melalui metode bioreduksi, larutan bioreduktor dicampur dengan prekursor AgNO3, tanpa penambahan PVA dan dengan penambahan PVA dengan variasi konsentrasi yang berbeda yaitu 1%; 1,5%; 2%; dan 2,5%. Berdasarkan hasil analisis gugus fungsi ekstrak daun sirsak menggunakan spektrofotometer FT-IR (Fourier Transform Infrared), menunjukkan serapan pada bilangan gelombang 3443 c

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Maranets, Theodore, Haoran Cui, and Yan Wang. "Lattice thermal conductivity of embedded nanoparticle composites: the role of particle size distribution." Nanotechnology 35, no. 5 (2023): 055701. http://dx.doi.org/10.1088/1361-6528/ad06d6.

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Abstract Nanoparticles embedded within a crystalline solid serve as impurity phonon scattering centers that reduce lattice thermal conductivity, a desirable result for thermoelectric applications. Most studies of thermal transport in nanoparticle-laden composite materials have assumed the nanoparticles to possess a single size. If there is a distribution of nanoparticle sizes, how is thermal conductivity affected? Moreover, is there a best nanoparticle size distribution to minimize thermal conductivity? In this work, we study the thermal conductivity of nanoparticle-laden composites through a

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Petithory, Tatiana, Laurent Pieuchot, Ludovic Josien, Arnaud Ponche, Karine Anselme, and Laurent Vonna. "Size-Dependent Internalization Efficiency of Macrophages from Adsorbed Nanoparticle-Based Monolayers." Nanomaterials 11, no. 8 (2021): 1963. http://dx.doi.org/10.3390/nano11081963.

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Functional coatings based on the assembly of submicrometric or nanoparticles are found in many applications in the biomedical field. However, these nanoparticle-based coatings are particularly fragile since they could be exposed to cells that are able to internalize nanoparticles. Here, we studied the efficiency of RAW 264.7 murine macrophages to internalize physisorbed silica nanoparticles as a function of time and particle size. This cell internalization efficiency was evaluated from the damages induced by the cells in the nanoparticle-based monolayer on the basis of scanning electron micros

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Haflin, Agusriani, Kartika Mustofa, et al. "FORMULATION AND IMMUNOMODULATORY BIOACTIVITY TEST OF NANOPARTICLE SYRUP OF ETHANOL EXTRACT OF SUNGKAI LEAVES (Peronema canescens Jack)." Medical Sains : Jurnal Ilmiah Kefarmasian 9, no. 1 (2024): 253–70. http://dx.doi.org/10.37874/ms.v9i1.936.

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Sungkai plants are beneficial immunomodulators because of the presence of flavanoid compounds that increase oxygen radicals and antibody production. Pharmaceutical preparations function as immunomodulators, typically in the form of syrups, tablets, capsules, suspensions, and emulsions. Until now, there has been no nanoparticle syrup on the market, even though nanoparticle preparations have the advantage of modifying particle size, controlling the release of active ingredients to reach the active side, protecting drugs from degradation, reducing toxicity, and minimizing side effects. The purpos

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Sah, Bindeshwar, Jing Wu, Adam Vanasse, et al. "Effects of Nanoparticle Size and Radiation Energy on Copper-Cysteamine Nanoparticles for X-ray Induced Photodynamic Therapy." Nanomaterials 10, no. 6 (2020): 1087. http://dx.doi.org/10.3390/nano10061087.

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The Copper-cysteamine (Cu-Cy) nanoparticle is a novel sensitizer with a potential to increase the effectiveness of radiation therapy for cancer treatment. In this work, the effect of nanoparticle size and the energy of X-rays on the effectiveness of radiation therapy are investigated. The effect of the particle size on their performance is very complicated. The nanoparticles with an average size of 300 nm have the most intense photoluminescence, the nanoparticles with the average size of 100 nm have the most reactive oxygen species production upon X-ray irradiation, while the nanoparticles wit

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Neouze Gauthey, Marie-Alexandra, Marco Litschauer, Michael Puchberger, Martin Kronstein, and Herwig Peterlik. "Tuning the Pore Size in Ionic Nanoparticle Networks." Journal of Nanoparticles 2013 (March 11, 2013): 1–9. http://dx.doi.org/10.1155/2013/682945.

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Highly promising hybrid materials consisting of silica, titania, or zirconia nanoparticles linked with ionic liquid-like imidazolium units have been developed. The nanoparticle networks are prepared by click-chemistry-like process through a nucleophilic substitution reaction. The type of metal oxide nanoparticles appears to play a key role regarding the pore size of the hybrid material.

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Zhang, Qian;, Idoia; Castellanos-Rubio, Rahul; Munshi, et al. "Model Driven Optimization of Magnetic Anisotropy of Exchange-Coupled Core-Shell Ferrite Nanoparticles for Maximal Hysteretic Loss." Chemistry of Materials 27, no. 21 (2015): 7380–87. https://doi.org/10.1021/acs.chemmater.5b03261.

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This study provides a guide to maximizing hysteretic loss by matching the design and synthesis of superparamagnetic nanoparticles to the desired hyperthermia application. The maximal heat release from magnetic nanoparticles to the environment depends on intrinsic properties of magnetic nanoparticles (e.g., size, magnetization, and magnetic anisotropy) and extrinsic properties of the applied fields (e.g., frequency and field strength). Often, the biomedical hyperthermia application limits flexibility in settings of many parameters (e.g., nanoparticle size and mobility, field strength, and frequ

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ALMAGGUZ, Lutfya, and Suliman SHANBR. "THE EFFECTS OF NANOTECHNOLOGY ON THE MECHANICAL AND PHYSICAL PROPERTIES OF METALS OF COOLING SYSTEMS." International Science and Technology Journal 34, no. 2 (2024): 1–38. http://dx.doi.org/10.62341/lass3487.

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Nanotechnology has revolutionized various scientific and engineering fields, including materials science. In this investigation, the focus is on examining the influence of titanium nanoparticle size on the mechanical and physical properties of metal. Incorporating nanoparticles into metal matrices presents an exciting opportunity to enhance material performance through size-dependent effects. Titanium nanoparticles have been chosen as the primary focus due to their unique properties and extensive applications. To assess the impact of nanoparticle size on mechanical properties, a series of expe

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Muneesawang, Paisarn, and Chitnarong Sirisathitkul. "Size Measurement of Nanoparticle Assembly Using Multilevel Segmented TEM Images." Journal of Nanomaterials 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/790508.

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Multilevel image segmentation is demonstrated as a rapid and accurate method of quantitative analysis for nanoparticle assembly in TEM images. The procedure incorporatingK-means clustering algorithm and watershed transform is tested on transmission electron microscope (TEM) images of FePt-based nanoparticles whose diameters are less than 5 nm. By solving the nanoparticle segmentation and separation problems, this unsupervised method is useful not only in the nonoverlapping case but also for agglomerated nanoparticles. Furthermore, the method exhibits scale invariance based on comparable result

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Hwang, Jimin, Sonya Mros, Allan B. Gamble, Joel D. A. Tyndall, and Arlene McDowell. "Improving Antibacterial Activity of a HtrA Protease Inhibitor JO146 against Helicobacter pylori: A Novel Approach Using Microfluidics-Engineered PLGA Nanoparticles." Pharmaceutics 14, no. 2 (2022): 348. http://dx.doi.org/10.3390/pharmaceutics14020348.

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Nanoparticle drug delivery systems have emerged as a promising strategy for overcoming limitations of antimicrobial drugs such as stability, bioavailability, and insufficient exposure to the hard-to-reach bacterial drug targets. Although size is a vital colloidal feature of nanoparticles that governs biological interactions, the absence of well-defined size control technology has hampered the investigation of optimal nanoparticle size for targeting bacterial cells. Previously, we identified a lead antichlamydial compound JO146 against the high temperature requirement A (HtrA) protease, a promi

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Wang, Jia, Hao Jie Xiao, Hai Xia Zhang, X. H. Liang, and Hui Li. "Size Dependence of Evaporation Temperature by Bond Number Calculation." Materials Science Forum 814 (March 2015): 96–100. http://dx.doi.org/10.4028/www.scientific.net/msf.814.96.

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In this study, a model based on bond number calculation in a system was developed to predict size-dependent evaporation temperature of nanoparticles. This model, free of any adjustable parameters, can be utilized to predict the thermal stability for low dimensional materials. If the atomic structure of a nanoparticle is known, the size and shape-dependent bond number can be obtained. The cubooctahedral structure was taken as the shape of nanoparticles for simplicity. According to the established model, the evaporation temperature of nanoparticles is dependent not only on their size, but also o

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Abdillah, Hamid, Muhammad Baharits, Rijal Abidin, and Firdaus Rizki Biantoro. "Synthesis of Antimicrobial Silver Nanoparticle Varnish using Moringa Leaf Bioreductor (Moringa Olifiera)." Jurnal Kimia dan Rekayasa 2, no. 2 (2022): 84–93. http://dx.doi.org/10.31001/jkireka.v2i2.38.

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Silver nanoparticles have stable properties and potential applications especially as anti-microbial agents. The growth of fungi and bacteria on the wood surface can be inhibited by varnishing with silver nanoparticles. The nano-silver particles were prepared by synthesizing silver nitrate at concentration of 1, 3, and 5 mM with Moringa oleifera as a bioreductant. PVA (Polyvinyl Alcohol) as a stabilizer was varied at the levels of 0.5%, 1%, and 2%. In the UV-Vis test, the wave peaks are in the range 395-515 nm, this is in accordance with the characteristics of silver nanoparticles. The addition

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Rodríguez-Mas, Fernando, Juan Carlos Ferrer, José Luis Alonso, David Valiente, and Susana Fernández de Ávila. "A Comparative Study of Theoretical Methods to Estimate Semiconductor Nanoparticles’ Size." Crystals 10, no. 3 (2020): 226. http://dx.doi.org/10.3390/cryst10030226.

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In this paper, we compare four different methods to estimate nanoparticle diameters from optical absorption measurements, using transmission electron microscopy (TEM) images as a reference for the nanoparticle size. Three solutions of colloidal nanoparticles coated with thiophenol with different diameters were synthesized by thiolate decomposition. The nanoparticle sizes were controlled by the addition of a certain volume of a 1% sulphur solution in toluene. TEM measurements showed that the average diameter for each type of these nanoparticles was 2.8 nm, 3.2 nm, and 4.0 nm. The methods studie

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Arnas, C., T. Guidez, A. Chami, J. H. Mun, and L. Couedel. "Forces applied to nanoparticles in magnetron discharges and the resulting size segregation." Physics of Plasmas 29, no. 7 (2022): 073703. http://dx.doi.org/10.1063/5.0095103.

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Two-dimensional measurements of magnetron discharge plasma parameters are used to calculate the forces applied to an isolated nanoparticle in conditions where nanoparticles are produced from cathode sputtering. Plasma spatial inhomogeneities, which are specific to magnetron discharges, also induce inhomogeneities in the charging mechanism and applied forces. It is shown that the nanoparticle transport is due to electric, thermophoretic and ion drag forces, and that the dominant one proportional to the nanoparticle size varies according to position. For a given plasma, these spatial differences

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Zhu, Daopei, Haocheng Yan, Siyuan Tian, and Zhangli Wang. "Size, Shape, and Material Effects in Ferroelectric Octahedral Nanoparticles." Journal of Nanomaterials 2021 (July 15, 2021): 1–8. http://dx.doi.org/10.1155/2021/2371168.

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Composite materials composed of multiferroelectric nanoparticles in dielectric matrixes have attracted enormous attention for their potential applications in developing future functional devices. However, the functionalities of ferroelectric nanoparticles depend on shapes, sizes, and materials. In this paper, a time-dependent Landau-Ginzburg method has been used and combined with a method as the coupled-physics finite-element-method-based simulations are used to illustrate the polarization behavior in isolated BaTiO3 or PbTiO3 octahedral nanoparticles embedded in a dielectric medium, like SrTi

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Peretz, Vital, Menachem Motiei, Chaim N. Sukenik, and Rachela Popovtzer. "The Effect of Nanoparticle Size on Cellular Binding Probability." Journal of Atomic, Molecular, and Optical Physics 2012 (June 7, 2012): 1–7. http://dx.doi.org/10.1155/2012/404536.

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Nanoparticle-based contrast agents are expected to play a major role in the future of molecular imaging due to their many advantages over the conventional contrast agents. These advantages include prolonged blood circulation time, controlled biological clearance pathways, and specific molecular targeting capabilities. Recent studies have provided strong evidence that molecularly targeted nanoparticles can home selectively onto tumors and thereby increase the local accumulation of nanoparticles in tumor sites. However, there are almost no reports regarding the number of nanoparticles that bind

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Kang, Dong Jin, and Sushant Anand. "Nanoparticle synthesis via bubbling vapor precursors in bulk liquids." Nanoscale 10, no. 25 (2018): 12196–203. http://dx.doi.org/10.1039/c8nr01903g.

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Bubbling of vaporized nanoparticle precursors in reactant solutions is an effective strategy to prepare nanoparticles (organic, inorganic, core–shell, and composite) with controlled size and polydispersity, while preventing unwanted side reactions.

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Pintilie, Stefan Catalin, Laurentia Geanina Tiron, Iulian Gabriel Birsan, Daniel Ganea, and Stefan Balta. "Influence of ZnO Nanoparticle Size and Concentration on the Polysulfone Membrane Performance." Materiale Plastice 54, no. 2 (2017): 257–61. http://dx.doi.org/10.37358/mp.17.2.4828.

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The activity of using membrane technology has developed fast in the treatment of wastewater, drinking water and process water production. The main challenges in membrane filtration are fouling reduction, permeability increase and high efficiency in retention. The best example of membrane enhancement is increasing hydrophilicity. Nanoparticles have been proven that their presence in the membrane matrix increases the water affinity significantly. Although the zinc oxide nanoparticles have a positive effect over the membrane performance, the influence of zinc oxide (ZnO) nanoparticle size has not

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Mandal, Soumen, Rajulapati Vinod Kumar, and Nagahanumaiah. "Silver and molybdenum disulfide nanoparticles synthesized in situ in dimethylformamide as dielectric for micro-electro discharge machining." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 233, no. 5 (2017): 1594–99. http://dx.doi.org/10.1177/0954405417733019.

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The research focuses on the applicability of silver (Ag) and molybdenum disulfide (MOS2) nanoparticle synthesized in situ in dimethylformamide solution as dielectric material for micro-electro discharge machining. Ag nanoparticles (~120 nm size) and MOS2 nanoparticles (~20 nm size) were synthesized in dimethylformamide solution using a combination of nanoparticle solution synthesis routes. A setup for micro-electro discharge machining was developed in-house with an arrangement to generate spark at varying voltages. The setup was integrated with a precise linear height gauge to measure the spar

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Huynh, Ngoc Han, and James C. L. Chow. "DNA Dosimetry with Gold Nanoparticle Irradiated by Proton Beams: A Monte Carlo Study on Dose Enhancement." Applied Sciences 11, no. 22 (2021): 10856. http://dx.doi.org/10.3390/app112210856.

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Heavy atom nanoparticles, such as gold nanoparticles, are proven effective radiosensitizers in radiotherapy to enhance the dose delivery for cancer treatment. This study investigated the effectiveness of cancer cell killing, involving gold nanoparticle in proton radiation, by changing the nanoparticle size, proton beam energy, and distance between the nanoparticle and DNA. Monte Carlo (MC) simulation (Geant4-DNA code) was used to determine the dose enhancement in terms of dose enhancement ratio (DER), when a gold nanoparticle is present with the DNA. With varying nanoparticle size (radius = 15

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González, V., B. Kharisov, and I. Gómez. "Preparation, optical characterization and stability of gold nanoparticles by facile methods." Revista Mexicana de Física 65, no. 6 Nov-Dec (2019): 690. http://dx.doi.org/10.31349/revmexfis.65.690.

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The influence of synthesis method, cycles quantity and sonication time in the gold nanoparticles size and plasmon resonance were analyzed to establish the synthesis with smaller nanoparticle size and higher absorbance. Gold nanoparticles were analyzed by UV-Vis spectrophotometry, dynamic light scattering (DLS) and surface electron microscopy (SEM). The results indicate that the nanoparticles obtained by microwave have bigger size but higher absorption. These nanoparticles were analyzed one year after its synthesis and it was found that the plasmon resonance signal remains almost unchanged. Fin

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Zhang, You Wei, Yan Chen, and Jiong Xin Zhao. "Facile Fabrication of Antibacterial Core–Shell Nanoparticles Based on PHMG Oligomers and PAA Networks via Template Polymerization." Australian Journal of Chemistry 67, no. 1 (2014): 142. http://dx.doi.org/10.1071/ch13295.

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Antibacterial core–shell nanoparticles based on poly(hexamethylene guanidine hydrochloride) (PHMG) oligomers and poly(acrylic acid) (PAA) networks are efficiently fabricated via a facile one-step co-polymerization of acrylic acid and N,N′-methylenebisacrylamide on PHMG templates in aqueous solution. Dynamic light scattering, Fourier-transform infrared spectroscopy, and transmission electron microscopy observations were used to characterize the size, morphology, and structure of the nanoparticles, as well as the interactions between the components. Also, the stability of the nanoparticle disper

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Majeed, Noor Sabeeh, Shaymaa Mahdi Salih, Hussam Nadum Abda Lraheemal Ani, Basma Abbas Abdulmajeed, Paul Constantin Albu, and Gheorghe Nechifor. "Study the Effect of SiO2 Nanofluids on Heat Transfer in Double Pipe Heat Exchanger." Revista de Chimie 71, no. 5 (2020): 117–24. http://dx.doi.org/10.37358/rc.20.5.8119.

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In this paper the effect of nanofluid is studied in the double pipe heat exchanger counter current flow, the viscosity of nanofluids are measured at different temperatures and different particle sizes. SiO2 nanoparticles are dispersed at different concentrations (0.2-2) % with different particle sizes of (50-25) nm in base fluid of water. The friction factor and heat transfer coefficient are calculated at different nanoparticle sizes, the results showed that the viscosity was increased as nanoparticle concentration increased. The friction factor is increased as SiO2 nanoparticles concentration

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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 (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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Agbabiaka, A., M. Wiltfong, and C. Park. "Small Angle X-Ray Scattering Technique for the Particle Size Distribution of Nonporous Nanoparticles." Journal of Nanoparticles 2013 (December 22, 2013): 1–11. http://dx.doi.org/10.1155/2013/640436.

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Nanoparticles are small particles whose sizes are less than 100 nm. They have many industrial applications due to their unique properties. Their properties are often size-dependent; thus the accurate determination of nanoparticle sizes is important for quality assurance of nanoparticle production processes. A small angle X-ray scattering technique is a promising method used for characterizing nanoparticle sizes. It has distinctive advantages over other techniques such as electron microscope techniques. In this paper, we review the state-of-the-art methods for determining the sizes of nanoparti

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Szałaj, Urszula, Anna Świderska-Środa, Agnieszka Chodara, Stanisław Gierlotka, and Witold Łojkowski. "Nanoparticle Size Effect on Water Vapour Adsorption by Hydroxyapatite." Nanomaterials 9, no. 7 (2019): 1005. http://dx.doi.org/10.3390/nano9071005.

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Handling and properties of nanoparticles strongly depend on processes that take place on their surface. Specific surface area and adsorption capacity strongly increase as the nanoparticle size decreases. A crucial factor is adsorption of water from ambient atmosphere. Considering the ever-growing number of hydroxyapatite nanoparticles applications, we decided to investigate how the size of nanoparticles and the changes in relative air humidity affect adsorption of water on their surface. Hydroxyapatite nanoparticles of two sizes: 10 and 40 nm, were tested. It was found that the nanoparticle si

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Yoshida K. "Role of Nanoparticle Size in the Photocatalytic Degradation of Pollutants." Journal of Chemistry 3, no. 2 (2024): 12–20. http://dx.doi.org/10.47672/jchem.2405.

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Purpose: The aim of the study was to assess the role of nanoparticle size in the photocatalytic degradation of pollutants. Methodology: This study adopted a desk methodology. A desk study research design is commonly known as secondary data collection. This is basically collecting data from existing resources preferably because of its low cost advantage as compared to a field research. Our current study looked into already published studies and reports as the data was easily accessed through online journals and libraries. Findings: The study indicated that smaller nanoparticles exhibit a higher

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Zhang, Huixing, Xiaowen Qi, Chengling Liu, et al. "Effect of Sonication and Ceria Doping on Nanoparticles Fabricated by Laser Marker Ablation of Ti in Water." Nanomaterials 13, no. 15 (2023): 2201. http://dx.doi.org/10.3390/nano13152201.

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By employing the laser marker fast ablation technique in water, combined with the innovative inclusion of sonication, we successfully developed Ti-based nanoparticles with improved characteristics. sonication increased the nanoparticle concentration in the colloid, reduced nanoparticle size, and also narrowed size distribution. Our findings also provide valuable insights into the influence of laser parameters, such as wavelength and fluence, on nanoparticle properties. UV laser led to small nanoparticles compared with 1064 nm laser. Additionally, high laser fluence appeared to increase the abl

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Yeshchenko, O. A., I. M. Dmitruk, A. A. Alexeenko, A. V. Kotko, J. Verdal, and A. O. Pinchuk. "Size and Temperature Dependence of the Surface Plasmon Resonance in Silver Nanoparticles." Ukrainian Journal of Physics 57, no. 2 (2012): 266. http://dx.doi.org/10.15407/ujpe57.2.266.

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The size and temperature dependences of the surface plasmon energy are studied for silver nanoparticles embedded in a silica host matrix in the size range 11–30 nm and in the temperature interval 293–650 K. It is revealed that the surface plasmon energy in studied silver nanoparticles depends on the size and the temperature of nanoparticles. As the size of nanoparticles decreases or the temperature increases, the surface plasmon resonance shifts to the red side.When the size of nanoparticles decreases, the rate of scattering of the conduction electrons on the nanoparticle surface increases, wh

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Yuan, Juan, Qing Quan Guo, Xiang Zhu He, and Yan Ping Liu. "Researching on the Adsorption of Protein on Gold Nanoparticles." Advanced Materials Research 194-196 (February 2011): 462–66. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.462.

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Because of their unique properties, gold nanoparticles(NPs) show a wide range of applications such as surface-enhanced raman characteristics, biological sensing, biomedical and other fields. Different initial concentrations of Bull Serum Albumin(BSA) and egg white lysozyme respectively react with different size of gold nanoparticles. The condition of adsorption is determined by spectrometry method, then the area of protein with different molecular mass on the surface of a gold nanoparticle is calculated. The results show that the larger particle size of a gold nanoparticle is, the more protein

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Tan, Lei, Andrei V. Sapelkin, Alston J. Misquitta, et al. "High-pressure neutron diffraction study of magnetite, Fe₃O₄, nanoparticles." Applied Physics Letters 120, no. 23 (2022): 233101. http://dx.doi.org/10.1063/5.0085164.

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We use in situ high-pressure neutron powder diffraction to study elastic properties of Fe3O4 magnetite nanoparticles of different sizes. It is found that nanoparticles are elastically softer than the bulk. Apart from the smallest nanoparticle of diameter 8 nm, the atomic and magnetic structures do not change significantly with nanoparticle size or pressure. The 8 nm sample appears to take a disordered spinel structure instead of the inverse spinel structure of the bulk and larger nanoparticles, as seen in bond lengths and magnetic structures. Synchrotron x-ray total scattering was used to supp

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Ershov, Vadim A., and Boris G. Ershov. "Effect of Silver Nanoparticle Size on Antibacterial Activity." Toxics 12, no. 11 (2024): 801. http://dx.doi.org/10.3390/toxics12110801.

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The ubiquitous use of products containing AgNPs results in the entry of nanoparticles into the environment. Both nanoparticles and Ag+ released upon their oxidative dissolution have a toxic effect on living microorganisms. The antibacterial activity of spherical silver nanoparticles of 10.8 ± 0.8 nm and 22.7 ± 2.2 nm in size stabilized by carbonate ions was studied against Escherichia coli and other bacteria. The biocidal action of silver increases as the particle size decreases. Analysis of these results and other known data made it possible to substantiate a linear proportional relationship

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Lin, H. L., W. E. Fu, H. F. Weng, et al. "Nanoparticle Characterization - Supplementary Comparison on Nanoparticle Size." Metrologia 56, no. 1A (2019): 04004. http://dx.doi.org/10.1088/0026-1394/56/1a/04004.

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Devadoss, Anitha, Calum Dickinson, Tia E. Keyes, and Robert J. Forster. "Electrochemiluminescent Metallopolymer−Nanoparticle Composites: Nanoparticle Size Effects." Analytical Chemistry 83, no. 6 (2011): 2383–87. http://dx.doi.org/10.1021/ac102697c.

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Prasad, Athira, Tuhin Subhra Santra, and Rengaswamy Jayaganthan. "A Study on Prediction of Size and Morphology of Ag Nanoparticles Using Machine Learning Models for Biomedical Applications." Metals 14, no. 5 (2024): 539. http://dx.doi.org/10.3390/met14050539.

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The synthesis of silver nanoparticles (AgNPs) holds significant promise for various applications in fields ranging from medicine to electronics. Accurately predicting the particle size during synthesis is crucial for optimizing the properties and performance of these nanoparticles. In this study, we compare the efficacy of tree-based models compared with the existing models, for predicting the particle size in silver nanoparticle synthesis. The study investigates the influence of input features, such as reaction parameters, precursor concentrations, etc., on the predictive performance of each

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Fernandez, Carlos A., and Chien W. Wai. "A Simple and Rapid Method of Making 2D and 3D Arrays of Gold Nanoparticles." Journal of Nanoscience and Nanotechnology 6, no. 3 (2006): 669–74. http://dx.doi.org/10.1166/jnn.2006.120.

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Monodispersive gold nanoparticles can be synthesized by a dropwise addition of a reducing agent microemulsion to a gold ion microemulsion followed by immediate stabilization with 1-decanethiol. No size-selective precipitations or digestive ripening procedures are necessary. There is no need for metal functionalization of the surfactant AOT. Gold nanoparticles with an average size of 3.8 nm and a relative size dispersion of 5.4% were observed using n-heptane as a solvent. It seems possible to adjust the nanoparticle size by small changes in the carbon chain length of the solvent. Self-assembled

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Prem Ananth, K., Sujin P. Jose, K. S. Venkatesh, and R. Ilangovan. "Size Controlled Synthesis of Magnetite Nanoparticles Using Microwave Irradiation Method." Journal of Nano Research 24 (September 2013): 184–93. http://dx.doi.org/10.4028/www.scientific.net/jnanor.24.184.

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The experimental conditions play an important role in particle size and in their properties in multifunctional magnetic nanoparticle synthesis. In the present study, magnetite nanoparticles of various sizes were synthesized by microwave irradiation method. The synthesized powder samples were characterized using XRD and SEM which substantiated the formation of magnetic nanoparticle in cubic phase. The particle sizes obtained were 40 nm, 31 nm and 27 nm from TEM micrographs. The FTIR studies confirmed the characteristic band of Fe-O within the range of 574 - 580 cm-1. The magnetic properties of

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Martelli, Stefano, and James C. L. Chow. "Dose Enhancement for the Flattening-Filter-Free and Flattening-Filter Photon Beams in Nanoparticle-Enhanced Radiotherapy: A Monte Carlo Phantom Study." Nanomaterials 10, no. 4 (2020): 637. http://dx.doi.org/10.3390/nano10040637.

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Monte Carlo simulations were used to predict the dose enhancement ratio (DER) using the flattening-filter-free (FFF) and flattening-filter (FF) photon beams in prostate nanoparticle-enhanced radiotherapy, with multiple variables such as nanoparticle material, nanoparticle concentration, prostate size, pelvic size, and photon beam energy. A phantom mimicking the patient’s pelvis with various prostate and pelvic sizes was used. Macroscopic Monte Carlo simulation using the EGSnrc code was used to predict the dose at the prostate or target using the 6 MV FFF, 6 MV FF, 10 MV FFF, and 10 MV FF photo

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Enas Hatem Kareem, Tamara Natik Dawood, and Firas Rashad Al-Samarai. "Application of Nanoparticle in the Veterinary Medicine." Magna Scientia Advanced Research and Reviews 4, no. 1 (2022): 027–38. http://dx.doi.org/10.30574/msarr.2022.4.1.0082.

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Nanotechnology is a modern and developed technology, which have great importance in many ﬁelds of medicine (diagnosis and treatment). Also, it used to prevent and solve many problems related to animal production and health. The Nanosystems are including metallic nanoparticles, liposomes, polymeric Nanospheres, polymeric micelles, carbon nanotubes, functionalized fullerenes, polymer-coated Nanocrystals, dendrimers and Nanoshells. Our review showed a details classification of nanoparticles and their uses. Nanoparticles have several features depended on the size, colossal surface. The development

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Nakata, Ayako, Shengzhou Li, and Tsuyoshi Miyazaki. "Large-Scale DFT Calculations on Size and Site Dependences of Atomic and Electronic Structures in Metallic Nanoparticle Catalysts." ECS Meeting Abstracts MA2024-02, no. 56 (2024): 3775. https://doi.org/10.1149/ma2024-02563775mtgabs.

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Size control of Pt nanoparticle catalysts is one of the key challenges in fuel cell development. Miniaturization of Pt nanoparticles is expected to increase activity and save the amount of Pt, while very small particles (e.g. sub-nano particles or clusters) have different electronic structures and stabilities from “nano” particles. To investigate the atomic and electronic structures of materials, first-principles density functional theory (DFT) calculation is a powerful tool. However, because of its high computational cost, the DFT applications have been limited mainly for small particles and

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