Journal of Nanoparticles最新文献

Synthesis and Investigation of Antimicrobial Activity of Cu2O Nanoparticles/Zeolite 纳米Cu2O /沸石的合成及抗菌性能研究

Journal of Nanoparticles Pub Date : 2017-01-09 DOI: 10.1155/2017/7056864

Bui Duy Du, Dang Van Phu, L. Quoc, N. Q. Hien

引用次数: 30

Synthesis and Characterization of Cockle Shell-Based Calcium Carbonate Aragonite Polymorph Nanoparticles with Surface Functionalization 具有表面功能化的贝壳基碳酸钙文石多晶纳米粒的合成与表征

Journal of Nanoparticles Pub Date : 2017-01-01 DOI: 10.1155/2017/8196172

Syairah Liyana Mohd Abd Ghafar, M. Hussein, Z. A. Zakaria

{"title":"Synthesis and Characterization of Cockle Shell-Based Calcium Carbonate Aragonite Polymorph Nanoparticles with Surface Functionalization","authors":"Syairah Liyana Mohd Abd Ghafar, M. Hussein, Z. A. Zakaria","doi":"10.1155/2017/8196172","DOIUrl":"https://doi.org/10.1155/2017/8196172","url":null,"abstract":"The development of cockle shell-based calcium carbonate aragonite polymorph nanoparticle synthesis method using the technique of mechanical stirring in the presence of dodecyl dimethyl betaine (BS-12) incorporated with surface functionalization demonstrated high homogeneity of sample product with good nanoparticles dispersion. The cockle shell-based calcium carbonate aragonite nanoparticle with functionalized surface was characterized using transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), particle size distribution, pH measurement analysis, Fourier Transform Infrared (FTIR) spectroscopy, and X-ray diffraction (XRD). Surface functionalization was proven to improve the overall size and shape of the nanoparticles and enhance their dispersion properties, preventing coarse agglomeration among nanoparticles in general. The improved method was verified to retain its aragonite crystalline nature. Additionally, surface functionalization did not increase the size of nanoparticles throughout the modification process. This facile preparation using naturally occurring cockle shells as the main source is environmentally friendly because it provides relatively low cost of raw material source as it is abundantly available in nature and has good mineral purity content. Hence, high quality production of surface functionalized cockle shell-based calcium carbonate aragonite polymorph nanoparticles can potentially be exploited and produced on a large scale for various industrial applications, especially for biomedical purposes in the near future.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"19 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90409954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30

Dispersion of Titanium Oxide Nanoparticles in Aqueous Solution with Anionic Stabilizer via Ultrasonic Wave 含阴离子稳定剂的氧化钛纳米粒子在水溶液中的超声波分散

Journal of Nanoparticles Pub Date : 2016-11-24 DOI: 10.1155/2016/6539581

W. Tsai, Jui-Yang Kao, Tzong‐Ming Wu, W. Cheng

引用次数: 39

Effect of Uniformly and Nonuniformly Coated Al2O3 Nanoparticles over Glass Tube Heater on Pool Boiling 均匀和不均匀涂覆氧化铝纳米颗粒对玻璃管加热器池沸腾的影响

Journal of Nanoparticles Pub Date : 2016-11-15 DOI: 10.1155/2016/8763171

Nitin A. Doifode, S. Gajghate, A. Najim, A. Acharya, A. Pise

引用次数: 2

Vitis vinifera Assisted Silver Nanoparticles with Antibacterial and Antiproliferative Activity against Ehrlich Ascites Carcinoma Cells 葡萄辅助银纳米颗粒对埃利希腹水癌细胞具有抗菌和抗增殖活性

Journal of Nanoparticles Pub Date : 2016-08-17 DOI: 10.1155/2016/6898926

A. Asaduzzaman, B. Chun, S. Kabir

引用次数: 15

A Thermofluid Analysis of the Magnetic Nanoparticles Enhanced Heating Effects in Tissues Embedded with Large Blood Vessel during Magnetic Fluid Hyperthermia 磁性纳米颗粒在磁流体热疗过程中增强大血管嵌入组织加热效应的热流体分析

Journal of Nanoparticles Pub Date : 2016-04-18 DOI: 10.1155/2016/6309231

Koustov Adhikary, M. Banerjee

{"title":"A Thermofluid Analysis of the Magnetic Nanoparticles Enhanced Heating Effects in Tissues Embedded with Large Blood Vessel during Magnetic Fluid Hyperthermia","authors":"Koustov Adhikary, M. Banerjee","doi":"10.1155/2016/6309231","DOIUrl":"https://doi.org/10.1155/2016/6309231","url":null,"abstract":"The thermal effect developed due to the heating of magnetic nanoparticles (MNPs) in presence of external magnetic field can be precisely controlled by the proper selection of magnetic absorption properties of the MNPs. The present paper deals with the numerical simulation of temperature field developed within or outside the tumor, in the presence of an external alternating magnetic field, using a thermofluidic model developed using ANSYS FLUENT®. A three-layer nonuniform tissue structure with one or two blood vessels surrounding the tumor is considered for the present simulation. The results obtained clearly suggest that the volumetric distribution pattern of MNPs within the tumor has a strong influence on the temperature field developed. The linear pattern of volumetric distribution has a strong effect over the two other types of distribution considered herein. Various other important factors like external magnetic field intensity, frequency, vascular congestion, types of MNP material, and so forth are considered to find the influence on the temperature within the tumor. Results show that proper selection of these parameters has a strong influence on the desired therapeutic temperature range and thus it is of utmost importance from the efficacy point of view of magnetic fluid hyperthermia (MFH).","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"53 1","pages":"1-18"},"PeriodicalIF":0.0,"publicationDate":"2016-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77703156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Improved Synthesis of Nanosized Silica in Water-in-Oil Microemulsions 油包水微乳液中纳米二氧化硅的改进合成

Journal of Nanoparticles Pub Date : 2016-03-09 DOI: 10.1155/2016/8203260

T. Kozlecki, I. Polowczyk, A. Bastrzyk, W. Sawiński

{"title":"Improved Synthesis of Nanosized Silica in Water-in-Oil Microemulsions","authors":"T. Kozlecki, I. Polowczyk, A. Bastrzyk, W. Sawiński","doi":"10.1155/2016/8203260","DOIUrl":"https://doi.org/10.1155/2016/8203260","url":null,"abstract":"Present contribution describes modified Stober synthesis of silica nanoparticles in oil-in-water microemulsion, formulated using heptane, 2-ethylhexanol, Tween® 85 nonionic surfactant, and tetraethyl orthosilicate (TEOS). After some specified incubation time, ammonium hydroxide was added and the reaction mixture was stirred for 24 hours at room temperature. Prior to synthesis, pseudoternary diagram was created for oil-rich area and Winsor IV region was identified. These microemulsions were used for synthesis of silica particles. Resulting particles were characterized by dynamic light scattering, electrokinetic measurements, specific surface area measurements, and powder diffraction. Particles’ diameter was ranging between ca. 130 and 500 nm; usually monodisperse distribution was obtained. The specific surface area of nanoparticles was ranging between 250 and 300 m2/g. Notably, productivity per unit volume of solution was 3 to 5 times higher than for previously reported procedures. Our method can be extended, because polymeric materials can be added to dispersed aqueous phase. In our studies, β-cyclodextrin and hydroxyethylcellulose have been used, giving particles between 170 and 422 nm, with the surface area larger than 300 m2/g.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"5 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2016-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91017373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Screening Antimicrobial Activity of Nickel Nanoparticles Synthesized Using Ocimum sanctum Leaf Extract 竹叶提取物合成纳米镍的抗菌活性筛选

Journal of Nanoparticles Pub Date : 2016-03-03 DOI: 10.1155/2016/4694367

Chitra Jeyaraj Pandian, R. Palanivel, Solairaj Dhanasekaran

{"title":"Screening Antimicrobial Activity of Nickel Nanoparticles Synthesized Using Ocimum sanctum Leaf Extract","authors":"Chitra Jeyaraj Pandian, R. Palanivel, Solairaj Dhanasekaran","doi":"10.1155/2016/4694367","DOIUrl":"https://doi.org/10.1155/2016/4694367","url":null,"abstract":"Antimicrobial efficacy of nickel nanoparticles synthesized using leaf extract of Ocimum sanctum (NiGs) was investigated against pathogenic Gram-negative (E. coli, K. pneumoniae, and S. typhi), Gram-positive (B. subtilis, S. epidermidis) bacteria and fungi (C. albicans, C. tropicalis, A. fumigatus, A. clavatus, and A. niger). 100 µg/mL NiGs showed maximum antimicrobial activity against tested pathogens compared to leaf extract and antibiotics. E. coli (25 mm) and C. albicans (23 mm) exhibited higher zone of inhibition at 100 µg/mL NiGs. MIC, MBC, and MFC values of NiGs against all tested pathogens ranged between 25 and 50 µg/mL. Growth of bacterial and fungal cells (105 cfu/mL) was completely inhibited at 50 µg/mL NiGs. E. coli and C. albicans have showed strong antimicrobial activity with 81% and 50% reactive oxygen species (ROS) production, 30 and 16 µg/mL protein leakage, and 95 and 82 U/L LDH leakages, respectively. Gram-negative bacteria and Candida species showed more sensitivity to NiGs at all concentrations tested (25–100 µg/mL) than Gram-positive bacteria and Aspergillus species, respectively. Microbial growth in the presence of NiGs and ascorbic acid confirmed the involvement of ROS in antimicrobial activity. Hence, NiGs induced ROS generation was attributed to the protein and LDH leakage from microbial membranes.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"61 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2016-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89737865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 51

Synthesis, Characterization, and Photocatalytic Performance of Mesoporous α-Mn2O3 Microspheres Prepared via a Precipitation Route 沉淀法制备介孔α-Mn2O3微球的合成、表征及光催化性能

Journal of Nanoparticles Pub Date : 2016-02-21 DOI: 10.1155/2016/8037013

M. Pudukudy, Z. Yaakob

{"title":"Synthesis, Characterization, and Photocatalytic Performance of Mesoporous α-Mn2O3 Microspheres Prepared via a Precipitation Route","authors":"M. Pudukudy, Z. Yaakob","doi":"10.1155/2016/8037013","DOIUrl":"https://doi.org/10.1155/2016/8037013","url":null,"abstract":"α-Mn2O3 microspheres with high phase purity, crystallinity, and surface area were synthesized by the thermal decomposition of precipitated MnCO3 microspheres without the use of any structure directing agents and tedious reaction conditions. The prepared Mn2O3 microspheres were characterized by Fourier transform infrared (FTIR) spectroscopy, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) and photoluminescence (PL) studies. The complete thermal transformation of MnCO3 to Mn2O3 was clearly shown by the FTIR and XRD analysis. The electron microscopic images clearly confirmed the microsphere-like morphology of the products with some structural deformation for the calcined Mn2O3 sample. The mesoporous texture generated from the interaggregation of subnanoparticles in the microstructures is visibly evident from the TEM and BET studies. Moreover, the Mn2O3 microstructures showed a moderate photocatalytic activity for the degradation of methylene blue dye pollutant under UV light irradiation, using air as the potential oxidizing agent.","PeriodicalId":16507,"journal":{"name":"Journal of Nanoparticles","volume":"172 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2016-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76677331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Structural, Electrical, Dielectric, and Magnetic Properties of Cd2 Cd2的结构、电学、介电和磁性能

Journal of Nanoparticles Pub Date : 2016-02-10 DOI: 10.1155/2016/4709687

B. H. Devmunde, A. V. Raut, S. D. Birajdar, S. Shukla, D. R. Shengule, K. M. Jadhav

引用次数: 32