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Journal articles on the topic 'Nanoparticels'

Author: Grafiati

Published: 6 September 2023

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1

Yang, Chun, Feng Yan Ge, Jin Cai Li, Zai Sheng Cai, and Fang Fang Qin. "Silver Nanoparticles with Enhanced Fluorescence Effects on Fluorescein Derivative." Advanced Materials Research 602-604 (December 2012): 187–91. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.187.

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Silver nanoparticles were prepared by sodium borohydride reduction method for analyzing metal-enhanced fluorescence property. Some variables including the dosage of reagent, reacting temperature and pH value had been investigated. Subsequently, a comparison of metal-enhanced fluorescence efficiency was made between two kinds of fluorescent dyes, namely fluorescein and 6-carboxyfluorescein at different silver concentrations. The experimental results show that the fluorescence of both dyes are remarkably enhanced. It is interesting to note that the increase of emission intensity is stronger than

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2

Trzaskus, K. W., A. J. B. Kemperman, and D. C. Nijmeijer. "Fouling Behavior of Silver Nanoparticels During Membrane Filtration." Procedia Engineering 44 (2012): 2096–97. http://dx.doi.org/10.1016/j.proeng.2012.09.058.

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3

Shan, Feng, and Tong Zhang. "Shape and Size Dependent Light Absorption Enhancement of Silver Nanostructures in Organic Solar Cells." Solid State Phenomena 266 (October 2017): 90–94. http://dx.doi.org/10.4028/www.scientific.net/ssp.266.90.

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Metal nanoparticles (MNPs) induced light absorption enhancement using for the improvement of power conversion efficiency of organic solar cells (OSCs) is a new research direction in photovoltaics. However, the device performance influence of the shape and size of MNPs has not been well investigated. In this paper, we focused on the comparison study of the optical absorption enhancement between silver nanospheres (Ag-NSs) and silver nanocubes (Ag-NCs) which are embedded in the active layer of OSCs using finite element method (FEM) simulation. Influence of the structural parameters, including th

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Kilic, Mehmet Emin, and Sakir Erkoc. "Structural Properties of ZnO Nanoparticels and Nanorings: Molecular Dynamics Simulations." Journal of Computational and Theoretical Nanoscience 10, no. 6 (2013): 1490–96. http://dx.doi.org/10.1166/jctn.2013.2878.

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5

Ruan, Li Li, Da Xin Wang, You Wei Zhang, et al. "Study on Preparation and Property of Drug Loading of AZM-PCL Nanoparticels." Applied Mechanics and Materials 121-126 (October 2011): 1764–68. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1764.

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This study was to prepare polycaprolactone (PCL) nanoparticles. The biodegradable PCL was used as the carrier, and Azithromycin (AZM) was used as the model drug. AZM-PCL nanoparticles (AZM-PCL-NPS) were prepared by desolvation method. The effect of preparation condition: concentration of PCL, molecular weight of PCL, organic solvents, dosage ratio and so on, were specially noted and compared. A homogeneous size distribution and good dispersion were observed, the average diameter was around 70~400 nm, and the distribution index was 0.036~0.136. The drug loading reached 27.69 %, and the efficien

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Wang, X., Z. Yang, Y. Zhang, et al. "MnO2Supported Pt Nanoparticels with High Electrocatalytic Activity for Oxygen Reduction Reaction." Fuel Cells 14, no. 1 (2013): n/a. http://dx.doi.org/10.1002/fuce.201300102.

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A. A. Aljabali, Alaa, Hamid A. Bakshi, Faruck L. Hakkim та ін. "Albumin Nano-Encapsulation of Piceatannol Enhances Its Anticancer Potential in Colon Cancer Via Downregulation of Nuclear p65 and HIF-1α". Cancers 12, № 1 (2020): 113. http://dx.doi.org/10.3390/cancers12010113.

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Piceatannol (PIC) is known to have anticancer activity, which has been attributed to its ability to block the proliferation of cancer cells via suppression of the NF-kB signaling pathway. However, its effect on hypoxia-inducible factor (HIF) is not well known in cancer. In this study, PIC was loaded into bovine serum albumin (BSA) by desolvation method as PIC–BSA nanoparticles (NPs). These PIC–BSA nanoparticles were assessed for in vitro cytotoxicity, migration, invasion, and colony formation studies and levels of p65 and HIF-1α. Our results indicate that PIC–BSA NPs were more effective in dow

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Zamorina, S. A., P. V. Khramtsov, M. B. Rayev, et al. "Graphene Oxide Nanoparticels Interaction with Jurkat Cell Line in Cell-IQ System." Doklady Biochemistry and Biophysics 501, no. 1 (2021): 438–43. http://dx.doi.org/10.1134/s1607672921060089.

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ZHANG Yang, 张杨, 李学红 LI Xue-hong, and 彭成晓 PENG Cheng-xiao. "Tunable Photoluminescence of ZnO Films with Different Surfaces by The Coating of Au Nanoparticels." Chinese Journal of Luminescence 33, no. 12 (2012): 1299–303. http://dx.doi.org/10.3788/fgxb20123312.1299.

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10

Droigk, Christine, Marco Maass, and Alfred Mertins. "Direct multi-dimensional Chebyshev polynomial based reconstruction for magnetic particle imaging." Physics in Medicine & Biology 67, no. 4 (2022): 045014. http://dx.doi.org/10.1088/1361-6560/ac4c2e.

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Abstract Magnetic Particle Imaging is a tomographic imaging technique that measures the voltage induced due to magnetization changes of magnetic nanoparticle distributions. The relationship between the received signal and the distribution of the nanoparticels is described by the system function. A common method for image reconstruction is using a measured system function to create a system matrix and set up a regularized linear system of equations. Since the measurement of the system matrix is time-consuming, different methods for acceleration have been proposed. These include modeling the sys

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11

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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12

Wang, Xijun. "The Magnetic Nanoparticle Movement in Magnetic Fluid Characterized by the Laser Dynamic Speckle Interferometry." Journal of Nanomaterials 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/287813.

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A dual scanning laser speckle interferometry experiment was designed to observe the dynamic behavior of the magnetic fluid actuated by a magnetic field. In order to improve the spatial resolution of the dynamic speckle measurement, the phase delay scanning was used to compensate the additional phase variation which was caused by the transverse scanning. The correlation coefficients corresponding to the temporal dynamic speckle patterns within the same time interval scattering from the nanoparticles were calculated in the experiment on nanoscale magnetic clusters. In the experiment, the speckle

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13

Karatrantos, Argyrios, Yao Koutsawa, Philippe Dubois, Nigel Clarke, and Martin Kröger. "Miscibility and Nanoparticle Diffusion in Ionic Nanocomposites." Polymers 10, no. 9 (2018): 1010. http://dx.doi.org/10.3390/polym10091010.

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We investigate the effect of various spherical nanoparticles in a polymer matrix on dispersion, chain dimensions and entanglements for ionic nanocomposites at dilute and high nanoparticle loading by means of molecular dynamics simulations. The nanoparticle dispersion can be achieved in oligomer matrices due to the presence of electrostatic interactions. We show that the overall configuration of ionic oligomer chains, as characterized by their radii of gyration, can be perturbed at dilute nanoparticle loading by the presence of charged nanoparticles. In addition, the nanoparticle’s diffusivity

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14

Xuan, Liang, Li-Jiao Tian, Tian Tian, Xue-Meng Wang, Dian-Hai Yang, and Han-Qing Yu. "In situ synthesizing silver nanoparticels by bio-derived gallic acid to enhance antimicrobial performance of PVDF membrane." Separation and Purification Technology 251 (November 2020): 117381. http://dx.doi.org/10.1016/j.seppur.2020.117381.

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15

Shannahan, Jonathan. "The biocorona: a challenge for the biomedical application of nanoparticles." Nanotechnology Reviews 6, no. 4 (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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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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17

Shagdarova, Balzhima, Mariya Konovalova, Yuliya Zhuikova, et al. "Collagen/Chitosan Gels Cross-Linked with Genipin for Wound Healing in Mice with Induced Diabetes." Materials 15, no. 1 (2021): 15. http://dx.doi.org/10.3390/ma15010015.

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Diabetes mellitus continues to be one of the most common diseases often associated with diabetic ulcers. Chitosan is an attractive biopolymer for wound healing due to its biodegradability, biocompatibility, mucoadhesiveness, low toxicity, and hemostatic effect. A panel of hydrogels based on chitosan, collagen, and silver nanoparticels were produced to treat diabetic wounds. The antibacterial activity, cytotoxicity, swelling, rheological properties, and longitudinal sections of hydrogels were studied. The ability of the gels for wound healing was studied in CD1 mice with alloxan-induced diabete

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18

Xu, Jicheng, Min Zhang, Ping Cao, Benu Adhikari, and Chaohui Yang. "Microorganisms control and quality improvement of stewed pork with carrots using ZnO nanoparticels combined with radio frequency pasteurization." Food Bioscience 32 (December 2019): 100487. http://dx.doi.org/10.1016/j.fbio.2019.100487.

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19

Elahi, S. M., A. Taghizadeh, A. Hadizadeh, and L. Dejam. "Effect of Thickness and Annealing on Structural and Optical Properties of Bi2Te3 Thin Films Prepared from Bi2Te3 Nanoparticels." International Journal of Thin Films Science and Technology 3, no. 1 (2014): 13–18. http://dx.doi.org/10.12785/ijtfst/030103.

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20

Mohammed, Tawfik Mahmood. "Mathematical modeling of the electronic structure of Titanium dioxide \((TiO_2 )_6\) nanoparticles." University of Aden Journal of Natural and Applied Sciences 24, no. 2 (2022): 519–26. http://dx.doi.org/10.47372/uajnas.2020.n2.a19.

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The calculation of the number of atoms of the given dimensional nanoparticle, composed of different type atoms has been researched in this work. The calculations have been carried out for nanoparticles of titanium dioxide. Theoretical visual models have been configured, and quantum – mechanical calculations have been carried out for \((TiO_2 )_6\) nanoparticle. The calculations for titanium dioxide nanoparticle have been carried out on the basis of Gaussian atomic orbitals. Besides, Gaussian functions have been used as atomic orbitals. The numerical values of unknown coefficients of the linear

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21

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 (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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22

Zhang, Yong, Xiao Jing Zhao, Qiang He, Ye Jun, and Qin Po Niu. "Experimental Study of Nanoparticle as Oil Additives." Advanced Materials Research 230-232 (May 2011): 288–92. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.288.

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Cu nanoparticles as N32 base oil additives were studied in the paper. The structure of Cu nanoparticlcs was characterized by Transmission Electron Microscopy (TEM) and X-ray powder diffraction spectroscope (XRD). The widely used steel-steel friction system was chosen to test the feasibility and practicality of Cu nanoparticles as bearing lubricant additives. The results show that N32 base oil with 0.5% Cu nanoparticle can improve the test sample contact fatigue life than pure N32 base oil.

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23

Zhao, Jiling, Chen Wang, Shixing Wang, Libo Zhang, and Bing Zhang. "Selective recovery of Au(III) from wastewater by a recyclable magnetic Ni0.6Fe2.4O4 nanoparticels with mercaptothiadiazole: Interaction models and adsorption mechanisms." Journal of Cleaner Production 236 (November 2019): 117605. http://dx.doi.org/10.1016/j.jclepro.2019.117605.

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24

M. Tóth, Orsolya, Ákos Menyhárt, Rita Frank, Dóra Hantosi, Eszter Farkas, and Ferenc Bari. "Tissue Acidosis Associated with Ischemic Stroke to Guide Neuroprotective Drug Delivery." Biology 9, no. 12 (2020): 460. http://dx.doi.org/10.3390/biology9120460.

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Ischemic stroke is a leading cause of death and disability worldwide. Yet, the effective therapy of focal cerebral ischemia has been an unresolved challenge. We propose here that ischemic tissue acidosis, a sensitive metabolic indicator of injury progression in cerebral ischemia, can be harnessed for the targeted delivery of neuroprotective agents. Ischemic tissue acidosis, which represents the accumulation of lactic acid in malperfused brain tissue is significantly exacerbated by the recurrence of spreading depolarizations. Deepening acidosis itself activates specific ion channels to cause ne

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25

Chandra, Arun, and Nalina C. "Review on nanoparticles technology and applications based on drug delivery." IP International Journal of Comprehensive and Advanced Pharmacology 6, no. 3 (2021): 117–20. http://dx.doi.org/10.18231/j.ijcaap.2021.021.

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This review is about nanocrystal technology and applications of nanocrystals based on drug delivery. Nanocrystal technology is applied to the drug molecules to access for good drug delivery as nano dimensioned carrier. Nanoparticle has at least one dimension smaller than 100 nanometers. The major properties of nanoparticles are increases dissolution velocity by surface area enlargement and increase in saturation solubility. Nanoparticle’s productions are done with different methods such as precipitation method, Milling method, and homogenized method. Nanoparticles has got wide range of applica

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Fan, Xunqin, Shuan Liu, and Ke Ruan. "Application of magnetic nanoparticles Fe304 in the field of orthopedics and medicine." E3S Web of Conferences 271 (2021): 04041. http://dx.doi.org/10.1051/e3sconf/202127104041.

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Magnetic nanoparticle Fe304 have super paramagnetic, biological cell compatibility, low toxicity, antibiosis and bacteriostasis, drug loading, sustained release and thermal effect. Using magnetic nanoparticies Fe304 as magnetic source, magnetic masoporous glass two-dimensional bone framework was synthesized under the action of external magnetic field, which provides growth space for bone repair, cell proliferation and metabolism, and contribute to mineralizing. The same time, The application of graphene, especially magnetic nanoparticles Fe304, in bone materials, bone repair and relatedmedical

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Gulomov, Jasurbek, and Rayimjon Aliev. "The Way of the Increasing Two Times the Efficiency of Silicon Solar Cell." Physics and Chemistry of Solid State 22, no. 4 (2021): 756–60. http://dx.doi.org/10.15330/pcss.22.4.756-760.

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Increase of the efficiency of the solar cells which are produced in industry, is important. Increase of efficiency of solar cells was identified, when nanoplasmonics phenomenon was formed in solar cell. So, in this article, influence of nanoparticles Pt, Au, Ag and Cu on properties of silicon based solar cell has been studied. When nanoparticle Pt was inclused in silicon based solar cell, its efficiency increased 2.31 times. Optimal radius of nanoparticule Pt was identified to be between 15-25 nm.

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Caballero-Florán, Isaac H., Hernán Cortés, Fabiola V. Borbolla-Jiménez, et al. "PEG 400:Trehalose Coating Enhances Curcumin-Loaded PLGA Nanoparticle Internalization in Neuronal Cells." Pharmaceutics 15, no. 6 (2023): 1594. http://dx.doi.org/10.3390/pharmaceutics15061594.

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This work proposes a combination of polyethylene glycol 400 (PEG) and trehalose as a surface modification approach to enhance PLGA-based nanoparticles as a drug carrier for neurons. PEG improves nanoparticles’ hydrophilicity, and trehalose enhances the nanoparticle’s cellular internalization by inducing a more auspicious microenvironment based on inhibiting cell surface receptor denaturation. To optimize the nanoprecipitation process, a central composite design was performed; nanoparticles were adsorbed with PEG and trehalose. PLGA nanoparticles with diameters smaller than 200 nm were produced

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Albarki, Mohammed A., and Maureen D. Donovan. "Uptake of Cationic PAMAM-PLGA Nanoparticles by the Nasal Mucosa." Scientia Pharmaceutica 90, no. 4 (2022): 72. http://dx.doi.org/10.3390/scipharm90040072.

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Nanoparticles provide promising advantages in advanced delivery systems for enhanced drug delivery and targeting. The use of a biodegradable polymer such as PLGA (poly lactic-co-glycolic acid) promotes improved nanoparticle safety and, to some extent, provides the ability to modify nanoparticle surface properties. This study compared the effect of altering the surface charge on the translocation of PLGA nanoparticles across excised nasal mucosal tissues. Nanoparticles (average diameter of 60–100 nm) loaded with Nile Red (lipophilic fluorescent dye) were fabricated using a nanoprecipitation met

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Li, Shidong, Yeap Hung Ng, Hon Chung Lau, Ole Torsæter, and Ludger P. Stubbs. "Experimental Investigation of Stability of Silica Nanoparticles at Reservoir Conditions for Enhanced Oil-Recovery Applications." Nanomaterials 10, no. 8 (2020): 1522. http://dx.doi.org/10.3390/nano10081522.

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To be effective enhanced oil-recovery (EOR) agents, nanoparticles must be stable and be transported through a reservoir. However, the stability of a nanoparticle suspension at reservoir salinity and temperature is still a challenge and how it is affected by reservoir rocks and crude oils is not well understood. In this work, for the first time, the effect of several nanoparticle treatment approaches on the stability of silica nanoparticles at reservoir conditions (in the presence of reservoir rock and crude oil) was investigated for EOR applications. The stability of nanoparticle suspensions w

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31

Maghoul, Amir, Ali Rostami, Samiyeh Matloub, and Amin Pourrezaei. "Design Considerations Influencing Optical Response in Gold Spherical Nanoparticles." Journal of Nano Research 46 (March 2017): 1–11. http://dx.doi.org/10.4028/www.scientific.net/jnanor.46.1.

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In this article, the relations between extinction cross section and Gold nanoparticle's parameters such as dimensions have been investigated. In this work, the extinction cross section of the core-shell nanoparticles is analyzed by changing the shell material and its thickness. By this, the interesting results such as shifting resonant peak in optical response are obtained. Moreover, a new model of nanostructure is proposed in which the resonant peak of extinction cross section can be controlled by adding silicon nanoparticles and impurity in the shell. This method can be used for tuning of th

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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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Olinger, Alexander D., Eric J. Spangler, P. B. Sunil Kumar, and Mohamed Laradji. "Membrane-mediated aggregation of anisotropically curved nanoparticles." Faraday Discussions 186 (2016): 265–75. http://dx.doi.org/10.1039/c5fd00144g.

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Using systematic numerical simulations, we study the self-assembly of elongated curved nanoparticles on lipid vesicles. Our simulations are based on molecular dynamics of a coarse-grained implicit-solvent model of self-assembled lipid membranes with a Langevin thermostat. Here we consider only the case wherein the nanoparticle–nanoparticle interaction is repulsive, only the concave surface of the nanoparticle interacts attractively with the lipid head groups and only the outer surface of the vesicle is exposed to the nanoparticles. Upon their adhesion on the vesicle, the curved nanoparticles g

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Leizou, Kaywood Elijah, and Muhammad Aqeel Ashraf. "GREEN SYNTHESIS APPROACH, CHARACTERIZATION, AND APPLICATIONS OF MgO NANO PARTICLES USING CURRY LEAF (MURRAYA KOENIGII)." Acta Scientifica Malaysia 6, no. 1 (2022): 06–09. http://dx.doi.org/10.26480/asm.01.2022.06.09.

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Nanotechnology has emerged as a state-of-the-art and cutting-edge technology with multifarious applications in a wide array of fields. The goal of this study was to create magnesium oxide nanoparticles using an aqueous extract of curry leaves (murraya koenigii or bergera koenigii). The morphology, elemental content, shape, and size of the produced MgO nanoparticles were determined using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy analysis (EDX). According to the SEM data, the MgO nanoparticle forms were well disseminated, with a spherical shape and particle size

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Michelakaki, Irini, Nikos Boukos, Dimitrios A. Dragatogiannis, Spyros Stathopoulos, Costas A. Charitidis, and Dimitris Tsoukalas. "Synthesis of hafnium nanoparticles and hafnium nanoparticle films by gas condensation and energetic deposition." Beilstein Journal of Nanotechnology 9 (June 27, 2018): 1868–80. http://dx.doi.org/10.3762/bjnano.9.179.

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In this work we study the fabrication and characterization of hafnium nanoparticles and hafnium nanoparticle thin films. Hafnium nanoparticles were grown in vacuum by magnetron-sputtering inert-gas condensation. The as deposited nanoparticles have a hexagonal close-packed crystal structure, they possess truncated hexagonal biprism shape and are prone to surface oxidation when exposed to ambient air forming core–shell Hf/HfO2 structures. Hafnium nanoparticle thin films were formed through energetic nanoparticle deposition. This technique allows for the control of the energy of charged nanoparti

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Chow, James C. L., and Sama Jubran. "Depth Dose Enhancement in Orthovoltage Nanoparticle-Enhanced Radiotherapy: A Monte Carlo Phantom Study." Micromachines 14, no. 6 (2023): 1230. http://dx.doi.org/10.3390/mi14061230.

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Background: This study was to examine the depth dose enhancement in orthovoltage nanoparticle-enhanced radiotherapy for skin treatment by investigating the impact of various photon beam energies, nanoparticle materials, and nanoparticle concentrations. Methods: A water phantom was utilized, and different nanoparticle materials (gold, platinum, iodine, silver, iron oxide) were added to determine the depth doses through Monte Carlo simulation. The clinical 105 kVp and 220 kVp photon beams were used to compute the depth doses of the phantom at different nanoparticle concentrations (ranging from 3

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Chavanpatil, Mahesh D., Ayman Khdair, and Jayanth Panyam. "Nanoparticles for Cellular Drug Delivery: Mechanisms and Factors Influencing Delivery." Journal of Nanoscience and Nanotechnology 6, no. 9 (2006): 2651–63. http://dx.doi.org/10.1166/jnn.2006.443.

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Polymeric nanoparticles have demonstrated enormous potential as cellular drug delivery vehicles. Nanoparticles improve drug's stability as well as its availability and retention at the target intracellular site of action. Therapeutic efficacy of nanoparticles can be further enhanced by conjugating specific ligands to nanoparticle surface. Ligand conjugation can also be used to favorably modify the intracellular disposition of nanoparticles. A number of ligands are available for this purpose; use of a specific ligand depends on the target cell, the material used for nanoparticle formulation, an

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Nakamura, Michihiro. "Biomedical applications of organosilica nanoparticles toward theranostics." Nanotechnology Reviews 1, no. 6 (2012): 469–91. http://dx.doi.org/10.1515/ntrev-2012-0005.

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AbstractNanoparticles for biomedical applications have several advantages as multifunctional agents. Among various types of nanoparticles for biomedical applications, silica nanoparticles have characteristic positioning due to their inherent property. The recent development of silica nanoparticles is creating a new trend in nanomedicine. A novel type of silica nanoparticle, organosilica nanoparticle, is both structurally and functionally different from the common (inorgano)silica nanoparticle. The organosilica nanoparticles are inherent organic-inorganic hybrid nanomaterials. The interior and

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Bertholon, Isabelle, Gilles Ponchel, Denis Labarre, Patrick Couvreur, and Christine Vauthier. "Bioadhesive Properties of Poly(alkylcyanoacrylate) Nanoparticles Coated with Polysaccharide." Journal of Nanoscience and Nanotechnology 6, no. 9 (2006): 3102–9. http://dx.doi.org/10.1166/jnn.2006.418.

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Development of bioadhesive nanoparticles is of great interest to improve drug absorption through the intestinal barrier. Various Polysaccharide-coated poly(alkylcyanoacrylate) nanoparticles were prepared. The bioadhesive properties of the nanoparticles coated with dextran or chitosan in end-on or side-on conformation were evaluated with an ex-vivo adsorption experiment on rat intestine. Results show that diffusion of nanoparticles in mucus layer was governed by the nanoparticle diameter and isotherms of adsorption were influenced by the nature of polysaccharide used. High amount of nanoparticl

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Zhang, Tiantian, Michael J. Murphy, Haiyang Yu, et al. "Investigation of Nanoparticle Adsorption During Transport in Porous Media." SPE Journal 20, no. 04 (2015): 667–77. http://dx.doi.org/10.2118/166346-pa.

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Summary Nanoparticles (diameter of approximately 5 to 50 nm) easily pass through typical pore throats in reservoirs, but physicochemical attraction between nanoparticles and pore walls may still lead to significant retention. We conducted an extensive series of nanoparticle-transport experiments in core plugs and in columns packed with crushed sedimentary rock, systematically varying flow rate, type of nanoparticle, injection-dispersion concentration, and porous-medium properties. Effluent-nanoparticle-concentration histories were measured with fine resolution in time, enabling the evaluation

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Murei, A., K. Pillay, and A. Samie. "Syntheses, Characterization, and Antibacterial Evaluation of P. grandiflora Extracts Conjugated with Gold Nanoparticles." Journal of Nanotechnology 2021 (December 24, 2021): 1–10. http://dx.doi.org/10.1155/2021/8687627.

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Background. With the recent increase in antibiotic resistance to conventional antibiotics, gold nanoparticles, and medicinal plants, extracts present an interesting alternative. Objectives. This study aimed to synthesize, characterize, and evaluate Pyrenacantha grandiflora Baill extracts and gold nanoparticle conjugates against pathogenic bacteria. Methods. We synthesized gold nanoparticles by chemical and biological methods. The nanoparticles were characterized by the use of UV-visible spectrophotometry, followed by transmission electron microscopy (TEM) and energy-dispersive X-ray analysis (

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Osaci, Mihaela, and Matteo Cacciola. "Influence of the magnetic nanoparticle coating on the magnetic relaxation time." Beilstein Journal of Nanotechnology 11 (August 12, 2020): 1207–16. http://dx.doi.org/10.3762/bjnano.11.105.

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Colloidal systems consisting of monodomain superparamagnetic nanoparticles have been used in biomedical applications, such as the hyperthermia treatment for cancer. In this type of colloid, called a nanofluid, the nanoparticles tend to agglomeration. It has been shown experimentally that the nanoparticle coating plays an important role in the nanoparticle dispersion stability and biocompatibility. However, theoretical studies in this field are lacking. In addition, the ways in which the nanoparticle coating influences the magnetic properties of the nanoparticles are not yet understood. In orde

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Johnston, Stuart T., Matthew Faria, and Edmund J. Crampin. "An analytical approach for quantifying the influence of nanoparticle polydispersity on cellular delivered dose." Journal of The Royal Society Interface 15, no. 144 (2018): 20180364. http://dx.doi.org/10.1098/rsif.2018.0364.

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Nanoparticles provide a promising approach for the targeted delivery of therapeutic, diagnostic and imaging agents in the body. However, it is not yet fully understood how the physico-chemical properties of the nanoparticles influence cellular association and uptake. Cellular association experiments are routinely performed in an effort to determine how nanoparticle properties impact the rate of nanoparticle–cell association. To compare experiments in a meaningful manner, the association data must be normalized by the amount of nanoparticles that arrive at the cells, a measure referred to as th

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Johnstone, Sharon, Steven Ansell, Sherwin Xie, Lawrence Mayer, and Paul Tardi. "The Use of Radioactive Marker as a Tool to Evaluate the Drug Release in Plasma and Particle Biodistribution of Block Copolymer Nanoparticles." Journal of Drug Delivery 2011 (July 7, 2011): 1–9. http://dx.doi.org/10.1155/2011/349206.

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Diblock copolymer nanoparticles encapsulating a paclitaxel prodrug, Propac 7, have been used to demonstrate the usefulness of a nonmetabolizable radioactive marker, cholesteryl hexadecyl ether (CHE), to evaluate nanoparticle formulation variables. Since CHE did not exchange out of the nanoparticles, the rate of clearance of the CHE could be used as an indicator of nanoparticle stability in vivo. We simultaneously monitored prodrug circulation and carrier circulation in the plasma and the retention of CHE relative to the retention of prodrug in the plasma was used to distinguish prodrug release

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Hou, Qi Qi, Xiao Ming Pan, and Wei Zheng. "The Study of New Type of Double Metal Nanofluids Suspension Stability." Applied Mechanics and Materials 440 (October 2013): 54–60. http://dx.doi.org/10.4028/www.scientific.net/amm.440.54.

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This paper made two types metal nanoparticles whose laws of motion had bigger different into ethylene glycol became a new type of double metals nanofluids coolant, and through theoretical analysis and experimental observations to research the different of aggregation properties with single metal nanofluids coolant. Research results of theoretical analysis showed that particles motion laws were the important element of nanoparticle aggregation, because of differences in movement, as the same conditions, double metals nanoparticles had the advantage of aggregation number and equivalent diameter

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Almehmady, Alshaimaa M., Khalid M. El-Say, Manal A. Mubarak, et al. "Enhancing the Antifungal Activity and Ophthalmic Transport of Fluconazole from PEGylated Polycaprolactone Loaded Nanoparticles." Polymers 15, no. 1 (2022): 209. http://dx.doi.org/10.3390/polym15010209.

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Fungal eye infections are caused mainly by an eye injury and can result in serious eye damage. Fluconazole (FLZ), a broad-spectrum antifungal agent, is a poorly soluble drug with a risk of hepatotoxicity. This work aimed to investigate the antifungal activity, ocular irritation, and transport of FLZ-loaded poly (ε-caprolactone) nanoparticles using a rabbit eye model. Three formulation factors affecting the nanoparticle’s size, zeta potential, and entrapment efficiency were optimized utilizing the Box-Behnken design. Morphological characteristics and antifungal activity of the optimized nanopar

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Foster, Shelby L., Katie Estoque, Michael Voecks, Nikki Rentz, and Lauren F. Greenlee. "Removal of Synthetic Azo Dye Using Bimetallic Nickel-Iron Nanoparticles." Journal of Nanomaterials 2019 (March 19, 2019): 1–12. http://dx.doi.org/10.1155/2019/9807605.

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Bimetallic nanoparticles comprised of iron (Fe) and nickel (Ni) were investigated for the removal of an azo dye contaminant in water. Morphology (core shell and alloy) and metal molar ratio (Ni2Fe10, Ni5Fe10, and Ni10Fe10) were tested as key nanoparticle properties. The shelf life of the nanoparticles was tested over a 3-week period, and the effect of initial nanoparticle concentration on dye removal was evaluated. The highest initial nanoparticle concentration (1000 mg/L) showed consistent Orange G removal and the greatest extent of dye removal, as compared to the other tested concentrations

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Markova, I. N., M. B. Piskin, I. Z. Zahariev, et al. "Influence of the Support on the Morphology of Co-Sn, Ni-Sn, Co-Ni Nanoparticles Synthesized Through a Borohydride Reduction Method Applying a Template Technique." REVIEWS ON ADVANCED MATERIALS SCIENCE 55, no. 1 (2018): 82–91. http://dx.doi.org/10.1515/rams-2018-0031.

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Abstract Intermetallic (Co-Sn, Ni-Sn, Co-Ni) nanoparticles have been synthesized through a borohydride reduction with NaBH4 in aqueous solutions of the chloride salts of Co, Ni, Sn at room temperature using a template technique with a carbon support. As a result nanocomposite materials have been obtained in situ. The ratio of the metallic components has been chosen according the phase diagrams of the relevant binary (Co-Sn, Ni-Sn, Co-Ni) systems: Co:Sn=35:65, Ni:Sn=45:55, Co:Ni=50:50. As carbon supports have been used graphite and carbon powder. To avoid the nanoparticle’s aggregation b-cyclod

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Cagliani, Roberta, Francesca Gatto, and Giuseppe Bardi. "Protein Adsorption: A Feasible Method for Nanoparticle Functionalization?" Materials 12, no. 12 (2019): 1991. http://dx.doi.org/10.3390/ma12121991.

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Nanomaterials are now well-established components of many sectors of science and technology. Their sizes, structures, and chemical properties allow for the exploration of a vast range of potential applications and novel approaches in basic research. Biomedical applications, such as drug or gene delivery, often require the release of nanoparticles into the bloodstream, which is populated by blood cells and a plethora of small peptides, proteins, sugars, lipids, and complexes of all these molecules. Generally, in biological fluids, a nanoparticle’s surface is covered by different biomolecules, w

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Rani N., Usha, Pavani P, and Prasad Rao P. T. S. R. K. "GREEN SYNTHESIS OF MANGANESE OXIDE NANOPARTICLES USING KIGELIA AFRICANA (LAM.) BENTH. AQUEOUS ROOT EXTRACT AND INFLUENCE ON CHICKPEA (CICER ARIETINUM LINN.) SEED GERMINATION AND PLANT GROWTH." Indian Drugs 59, no. 04 (2022): 34–39. http://dx.doi.org/10.53879/id.59.04.13009.

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Use of different seed priming treatments improves seed germination and thus increases plant growth and yield potential. Eco-friendly, cost-effective, simple, and effective seed treatments need to be developed for a high-consuming crop like chickpea (Cice rarietinum Lin.). In the present study, manganese oxide nanoparticles were synthesized using an aqueous extract of roots of Kigelia africana (Lam.) Benth and used as nano priming agents for chickpea seeds. The synthesized nanoparticles were found to have rod-like morphology with heterogeneous size distribution. The nanoparticle’s average size

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