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Nano particle

Hai-Long Yao, Guan-Jun Yang, Chang-Jiu Li
Particle collision behavior influences significantly inter-nano particle bonding formation during the nano-ceramic coating deposition by vacuum cold spraying (or aerosol deposition method). In order to illuminate the collision behavior between nano-scale ceramic particles, molecular dynamic simulation was applied to explore impact process between nano-scale TiO2 particles through controlling impact velocities. Results show that the recoil efficiency of the nano-scale TiO2 particle is decreased with the increase of the impact velocity...
April 1, 2018: Journal of Nanoscience and Nanotechnology
A Silambarasu, A Manikandan, K Balakrishnan, Saravana Kumar Jaganathan, E Manikandan, Jagathrakshakan Sundeep Aanand
Spinel MnFe2O4 nanostructures were synthesized by simple, economical and eco-friendly microwave combustion (MCM) and conventional combustion (CCM) methods using metal nitrates and glycine used as the fuel, instead of toxic inorganic/organic catalyst, template and surfactant. Powder XRD and FT-IR, EDX and SAED results were confirmed the products have a cubic phase spinel structure. EDX and SAED results confirmed purity and high crystallinity without any other secondary phase impurities. HR-SEM and HR-TEM analysis indicate that the MCM and CCM products consist of nano- and microstructures, respectively...
May 1, 2018: Journal of Nanoscience and Nanotechnology
Dattatraya Adkar, Parag Adhyapak, Uttamrao Mulik, Sandesh Jadkar, Katia Vutova, Dinesh Amalnerkar
SnS nanostructured materials have attracted enormous interest due to their important properties and potential application in low cost solar energy conversion systems and optical devices. From the perspective of SnS based device fabrication, we offer single-stroke in-situ technique for the generation of Sn based sulphide and oxide nanostructures inside the polymer network via polymer-inorganic solid state reaction route. In this method, polyphenylene sulphide (PPS)-an engineering thermoplastic-acts as chalcogen source as well as stabilizing matrix for the resultant nano products...
May 1, 2018: Journal of Nanoscience and Nanotechnology
Xi Yang, Xiaoyan Yu, Kimiyoshi Naito, Huili Ding, Xiongwei Qu, Qingxin Zhang
A new thermally conductive and electrically insulative polyimide were prepared by filling different amounts of hexagonal boron nitride (h-BN) particles, and the thermal conductivity of Polyimide (PI) composites were improved with the increasing h-BN content. Based on this, two methods were applied to improve thermal conductivity furtherly at limited filler loading in this paper. One is modifying the h-BN to improve interface interaction, another is fabricating a nano-micro hybrid filler with 2-D h-BN and 0-D nano-scale nanodiamond (ND) to build more effective conductive network...
May 1, 2018: Journal of Nanoscience and Nanotechnology
Liangli Cao, Yuren Jiang, Zhencheng Chen
In the present research an attempt was made to develop and optimize rapamycin (Rapa) loaded hollow magnetic Fe3O4/graphene oxide (Fe3O4/GO) nanocomposites using solvent evaporation technique and response surface methodology (RSM). A Box-Behnken design (BBD) with a three-level, three-factor was used to determine preparation parameters that would achieve the highest encapsulation efficiency (EE) and drug loading capacity (DLC). At optimum conditions such as mass ratio of Rapa to Fe3O4/GO (Rapa: Fe3O4/GO) 0.45, oscillation rate 144...
May 1, 2018: Journal of Nanoscience and Nanotechnology
Morgana de Medeiros Machado, Bruna Martinello Savi, Mariana Borges Perucchi, Alessandro Benedetti, Luis Felipe Silva Oliveira, Adriano Michael Bernardin
The aim of this work was to determine the effect of temperature, precursor and dripping time on the crystallite size of ZnO nanoparticles synthesized by controlled precipitation according a 2k full factorial design. ZnCl2, Zn(NO3)2 and NaOH were used as precursors. After synthesis, the nano crystalline powder was characterized by XRD (Cu Kα), UV-Vis, and HR-TEM. The nano ZnO particles presented a crystallite size between 210 and 260 Å (HR-TEM and XRD). The results show that the crystallite size depends on the type of precursor and temperature of synthesis, but not on the dripping time...
June 1, 2018: Journal of Nanoscience and Nanotechnology
Hai-Long Yao, Xiao-Zhen Hu, Guan-Jun Yang
Inter-particle bonding formation which determines qualities of nano-scale ceramic coatings is influenced by particle collision behaviors during high velocity collision processes. In this study, collision behaviors between nano-scale TiN particles with different diameters were illuminated by using Molecular Dynamics simulation through controlling impact velocities. Results show that nano-scale TiN particles exhibit three states depending on particle sizes and impact velocities, i.e., bonding, bonding with localized fracturing, and rebounding...
June 1, 2018: Journal of Nanoscience and Nanotechnology
P Bhavani, A Manikandan, P Paulraj, A Dinesh, M Durka, S Arul Antony
Spinel ZnAl2O4 nano-catalysts were synthesized by a simple, economical and eco-friendly microwave irradiation (MIM) and conventional heating methods (CHM), using metal nitrates and Okra (Abelmoschus esculentus) plant extract, which play a dual role of both oxidizing and reducing nature. Powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, energy dispersive X-ray (EDX) and selected area electron diffraction (SAED) pattern results were confirmed that the samples have a single-phase cubic spinel structure with high crystalline nature of ZnAl2O4...
June 1, 2018: Journal of Nanoscience and Nanotechnology
Guanhui Gao, Lingwei Wang, Peng Yang, Liang Huang, Xiaobin Xie, Jingsong Wu, Chen Qiu, Lintao Cai
We developed a facile and green bio-inspired strategy to fabricate silver nano-particles growth in-situ on different scaffolds materials, building novel heterostructures for promoting their antibacterial activities and durability. Firstly, fluorinated graphene oxide (FGO) nanosheets, layered molybdenum disulfide (MoS2), and layered tungsten disulfide (WS2) were exfoliated by chemical liquid with intense sonication. And silicon dioxide (SiO2) nano-spheres were prepared via wet chemical method. Then, silver nanoparticles were grown onto those surfaces of layered nanosheets and nano-spheres, hybridizing three dimensional hetero-architectures...
June 1, 2018: Journal of Nanoscience and Nanotechnology
Li-Qing Chen, Zhe-Ming Zhang, Wei Huang, Zhong-Gao Gao, Wei-Shuo Fang, Ming-Ji Jin, Lian Yu
Triple negative breast cancer (TNBC) is a severe breast cancer subtype with the high mortality rate, and still is lack of effective therapeutic means so far. Aziditaxel, a water-insoluble compound, is a novel taxane derivative with strong anti-tumor activity. In this study, we constructed an aziditaxel-loaded nano drug delivery system using human serum albumin as a carrier, and further investigated its anti-tumor effect on TNBC in vitro. An emulsion solvent evaporation method was employed to prepare aziditaxel-loaded human serum albumin nanoparticles (AT-NPs)...
March 1, 2017: Die Pharmazie
Yujiao Zu, Haley Overby, Guofeng Ren, Zhaoyang Fan, Ling Zhao, Shu Wang
Trans-resveratrol (R) has a potential to increase energy expenditure via inducing browning in white adipose tissue. However, its low levels of aqueous solubility, stability, and poor bioavailability limit its application. We have successfully synthesized biocompatible, and biodegradable R encapsulated lipid nanocarriers (R-nano), and R encapsulated liposomes (R-lipo). The mean particle size of R-nano and R-lipo were 140 nm and 110 nm, respectively, and their polydispersity index values were less than 0...
December 27, 2017: Colloids and Surfaces. B, Biointerfaces
Zhixiong Li, Gregory V Lowry, Jin Fan, Fei Liu, Jiawei Chen
Nanoscale zero valent iron particles (nano-Fe0) are attractive for in-situ groundwater remediation due to their high reactivity and ability to degrade many different classes of environmental contaminants. It is expected that adsorbed natural organic matter (NOM), which is heterogeneous and typically has a wide molecular weight (MW) distribution, will affect the reactivity and performance of nano-Fe0 as a remediation agent. However, the interaction of NOM with nano-Fe0 has not been well-studied. In this study, we used high performance size exclusion chromatography (HPSEC) to determine if there was preferential sorption of the high MW fraction of NOM onto nano-Fe0 that have a Fe0 core and a Fe-oxide shell (predominantly magnetite)...
February 9, 2018: Science of the Total Environment
S Majumder, Shivangi Johari
An improved gold nanoparticle based Dot immunobinding assay (DIBA) was developed for the detection of Banana bunchy top virus (BBTV), that is more efficient, sensitive, rapid and simpler than conventional DIBA and ELISA. Instead of enzyme conjugates, gold nanoparticles were used as reporters owing to their unique optical properties. Antibody was raised against expressed recombinant coat protein of BBTV. The gold nanoparticles were conjugated to primary / detection antibody raised following immunization with recombinant coat protein, making it highly specific for the virus...
February 9, 2018: Journal of Virological Methods
Mahesh Thondawada, Ashish Devidas Wadhwani, Dhanabal S Palanisamy, Hanumant Singh Rathore, Ramesh C Gupta, Pavan Kumar Chintamaneni, Malay K Samanta, Anil Dubala, Sameer Varma, Praveen T Krishnamurthy, Kuppusamy Gowthamarajan
Nanotechnology based bio-medical approaches and surface modification techniques made it easier for targeting specific site and improving the treatment efficacy. The present study reports on targeted polymeric nanoparticles conjugated with antibody as a site-specific carrier system for effective treatment of Type 1 diabetes. Sitagliptin (SP) loaded Poly (lactic-co-glycolic acid) (PLGA) nanoparticles (NP) were prepared by nanoprecipitation cum solvent evaporation method and were characterized in terms of morphology, size, surface charge and entrapment efficiency...
February 12, 2018: Drug Development and Industrial Pharmacy
Jianyu Li, Shulin Lü, Shusen Wu, Qi Gao
Ultrasonic vibration (UV) treatment has been successfully applied to improve the particles distribution of nano-sized SiC particles (SiCp) reinforced Al-5Cu alloy matrix composites which were prepared by combined processes of dry high energy ball milling and squeeze casting. When UV treatment is applied, the distribution of nano-sized SiCp has been greatly improved. After UV for 1 min, large particles aggregates are broken up into small aggregates due to effects of cavitation and the acoustic streaming. After UV for 5 min, all the particles aggregates are dispersed and the particles are uniformly distributed in the composites...
April 2018: Ultrasonics Sonochemistry
Reza Abazari, Ali Reza Mahjoub, Alexandra M Z Slawin, Cameron L Carpenter-Warren
In this study, we have reported a biocompatible metal-organic framework (MOF) with ultra-high surface area, which we have shown to have uses as both a cancer treatment delivery system and for environmental applications. Using a sonochemical approach, highly flexible organic H3BTCTB and ditopic 4,4'-BPDC ligands, along with modulators of acetic acid and pyridine were combined to prepare a Zn(II)-based metal-organic framework, DUT-32, [Zn4O(BPDC)(BTCTB)4/3(DEF)39.7(H2O)11.3]. Powder X-ray diffraction (PXRD), field-emission scanning electron microscopy (FE-SEM), and Fourier transform infrared spectroscopy (FTIR) were used to characterize, the particle size, shape, and structure of the DUT-32...
April 2018: Ultrasonics Sonochemistry
Bin Dong, Guang Li, Xiaogang Yang, Luming Chen, George Z Chen
(NH4)Fe2(PO4)2(OH)·2H2O samples with different morphology are successfully synthesized via two-step synthesis route - ultrasonic-intensified impinging stream pre-treatment followed by hydrothermal treatment (UIHT) method. The effects of the adoption of ultrasonic-intensified impinging stream pre-treatment, reagent concentration (C), pH value of solution and hydrothermal reaction time (T) on the physical and chemical properties of the synthesised (NH4)Fe2(PO4)2(OH)·2H2O composites and FePO4 particles were systematically investigated...
April 2018: Ultrasonics Sonochemistry
Elham Ghavidelaghdam, Gholam Hossein Shahverdizadeh, Javad Motameni Tabatabai, Babak Mirtamizdoust
Nano structure of a lead (II) coordination polymer [Pb2(C2Cl3O2)2(NO3)2(Cl2H8N2)2]n (1), has been synthesized by a sonochemical method in different concentrations. The nano particles were characterized by scanning electron microscopy (SEM) X-ray powder diffraction (XRD), FT-IR spectroscopy and elemental analyses. The thermal stability of nano structure is closely investigated via thermal gravimetric (TGA), and compared with crystalline structure. The compounds are then heated to 600 °C to produce PbO nano particles...
April 2018: Ultrasonics Sonochemistry
Maniya Gharib, Vahid Safarifard, Ali Morsali
Nano plates of zinc(II) based metal-organic framework (MOF) were prepared via ultrasonic method without any surfactants at room temperature and atmospheric pressure. Control of particle size and morphology was enhanced in this synthesis method. Nano plates of an interpenetrated amide-functionalized metal-organic framework, [Zn2(oba)2(bpfb)]·(DMF)5, TMU-23, (H2oba = 4,4'-oxybis(benzoic acid); bpfb = N,N'-bis-(4-pyridylformamide)-1,4-benzenediamine, DMF = N,N-dimethyl formamide), was synthesized under ultrasound irradiation in different concentrations of initial precursor...
April 2018: Ultrasonics Sonochemistry
Christian Monsé, Olaf Hagemeyer, Monika Raulf, Birger Jettkant, Vera van Kampen, Benjamin Kendzia, Vitali Gering, Günther Kappert, Tobias Weiss, Nadin Ulrich, Eike-Maximilian Marek, Jürgen Bünger, Thomas Brüning, Rolf Merget
BACKGROUND: Inhalation of high concentrations of zinc oxide particles (ZnO) may cause metal fume fever. In an earlier human inhalation study, no effects were observed after exposure to ZnO concentrations of 0.5 mg/m3. Further data from experimental studies with pure ZnO in the concentration range between 0.5 and 2.5 mg/m3 are not available. It was the aim of this experimental study to establish the concentration-response relationship of pure nano-sized ZnO particles. METHODS: Sixteen healthy subjects were exposed to filtered air and ZnO particles (0...
February 12, 2018: Particle and Fibre Toxicology
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