检索结果-南通市图书馆

Uniform and Homogeneous Growth of Copper Nanoparticles on Electrophoretically Deposited Carbon Nanotubes Electrode for Nonenzymatic Glucose Sensor

在线全文

学校读者我要写书评

暂无评论

引用

Acta Metallurgica Sinica(English Letters) 2016年第10期29卷 889-894页

作者： Syeda Ammara Shahzadi Shamaila rehana sharif Sheeba Ghani Nosheen Zafar Department of Physics University of Engineering and Technology Department of Physics Forman Christian College (A Chartered University)

The multiwalled carbon nanotubes thin-film-based electrode was fabricated by electrophoretic deposition and modified with copper （Cu） nanoparticles to fabricate Cu/CNTs nanocomposite sensor for nonenzymatic glucose detection. The expensive glassy carbon electrode was replaced by fluorine-doped tin oxide glass containing CNTs film to confine the Cu nanoparticles growth by electrodeposition through cyclic voltammetry （CV）. The ultraviolet visible and X-ray diffraction analysis revealed the successful deposition of Cu nanoparticles on the CNTs-modified electrode. The atomic force microscopy images confirrqed the morphology of electrodeposited Cu on CNTs film as uniformly dispersed particles. The electrocatalytic activity of electrode to the glucose oxidation was investigated in alkaline medium by CV and amperometric measurements. The fabricated sensor exhibited a fast response time of less than 5 s and the sensitivity of 314 μA rnM^-1 cm^-2 with linear concentration range （0.02-3.0 mM） having detection limit 10.0 μM. Due to simple preparation of sensor, Cu/CNTs nanocomposite electrodes are a suitable candidate for reliable determination of glucose with good stability.

关键词： Electrophoretic deposition (EPD) Fluorine-doped tin oxide (FTO) substrate Carbon nanotubes Copper nanoparticles Nonenzymatic electrocatalysis Glucose sensor

Antibacterial Behavior of Laser-Ablated Copper Nanoparticles

在线全文

学校读者我要写书评

暂无评论

引用

Acta Metallurgica Sinica(English Letters) 2016年第8期29卷 748-754页

作者： hina khalid shamaila shamaila nosheen zafar rehana sharif jawad nazir mohammad rafique sheeba ghani hussain saba Department of Physics University of Engineering and Technology Department of Microbiology University of Veterinary and Animal Sciences

Copper nanoparticles（Cu NPs） have been synthesized by using laser ablation method,using deionized water as main *** formation of Cu NPs is confirmed by UV-visible spectrophotometer（UV-Vis）,atomic force microscopy（AFM） and X-ray diffraction（XRD）.Cu NPs fabricated by laser ablation have diameter in the range from 14 to 55 *** analysis revealed the face-centered cubic（fcc） crystal structure of Cu *** antibacterial activity of Cu NPs has been evaluated in vitro against strains of Escherichia coli（***） and Staphylococcus aureus（***）.The fabricated Cu NPs show considerable antibacterial activity against both bacterial *** bacterial activity of Cu NPs was found to depend on the microbial species.

关键词： Laser-ablated nanoparticles UV-visible spectrophotometer Atomic force microscopy(AFM) Escherichia coli Staphylococcus aureus

Antibacterial Action of Chemically Synthesized and Laser Generated Silver Nanoparticles against Human Pathogenic Bacteria

在线全文

学校读者我要写书评

暂无评论

引用

Journal of Materials Science & Technology 2016年第8期32卷 721-728页

作者： Nosheen Zafar Shahzadi Shamaila Jawad Nazir rehana sharif Muhammad Shahid Rafique Jalees Ul-Hasan Syeda Ammara Hina Khalid Department of Physics University of Engineering and Technology Lahore 54890 Pakistan Department of Microbiology University of Veterinary and Animal Sciences Lahore Pakistan Department of Physics Forman Christian College A Charted University Lahore Pakistan

Silver nanoparticles in the range of 10-40 nm were synthesized chemically and by laser ablation, em- ployed for in vitro antibacterial action against human pathogenic bacterium. Their formation was evidenced by UV-visible spectrophotometer; particle size confirmed by atomic force microscopy, crystal structure determined by X-ray diffraction and chemical composition investigated by Fourier transform infrared spec- troscopy. The calculated MIC （minimum inhibitory concentration） of chemically synthesized nanoparticles with 30-40 nm in size are 2.8 μg/mL 4.37 μg/mL 13.5μg/mL and 2.81 p.g/mL for E. coil, S. aureus, B. subtillis and Salmonella, respectively. Whereas laser ablated nanoparticles exhibit MIC of 2.10 μg/mL 2.36 μg/ mL and 2.68 μg/mL for E. coli, S. aureus and Salmonella, respectively.

关键词： Chemically synthesized and laser ablated nanoparticles UV-visible spectrophotometer Gram negative and gram positive bacteria