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Nanoparticles Influence on Dye-Sensitized Solar Cells Based on TiO2
Issue:
Volume 2, Issue 3, May 2014
Pages:
32-39
Received:
15 April 2014
Accepted:
4 May 2014
Published:
20 May 2014
Abstract: Today, Solar cell technology is in limited use due to the relatively high manufacturing cost of silicon based technology, And the low power efficiency of organic polymer based technology. However, Research is being done on hybrid cells based on dye-sensitizing organic polymers and a thin transparent conducting oxide layer comprised of nanoparticles. These cells could offer the same ease of manufacturing as organic cells, with improved efficiency. Currently, although the improved efficiency is promising, It is still far below silicon based solar cells. The nanotubes clearly show longer response times, Which correlate to longer electron lifetimes, Which means less recombination of electron-hole pairs. This will ultimately translate to higher energy output. This paper will explore the role of nanomaterials in this flexible solar cell technology. A discussion on current efforts to improve efficiency will follow.
Abstract: Today, Solar cell technology is in limited use due to the relatively high manufacturing cost of silicon based technology, And the low power efficiency of organic polymer based technology. However, Research is being done on hybrid cells based on dye-sensitizing organic polymers and a thin transparent conducting oxide layer comprised of nanoparticles...
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Modelling and Computer Simulation of Nanostructured Devices
Kurapati Srinivas,
Duggirala Krishna Rao
Issue:
Volume 2, Issue 3, May 2014
Pages:
40-44
Received:
12 April 2014
Accepted:
8 May 2014
Published:
20 May 2014
Abstract: Theory, modeling, and simulation provide investigative tools that support nanotechnology. Multi scale modeling is essential for exploring the numerous, new technology possibilities that research in nanoscience is creating. The purpose of the proposed review work is to explore models and techniques for designing and controlling nanostructured devices and establish links between physical (quantum) device modelling, experimental system identification, model verification and quantum control. Having reliable mathematical and computational models, methods and using standard tools with efficient computer simulation, it is essential to design complicated quantum devices such as semi-conductor nanostructures, superconducting devices before they are fabricated experimentally. The proposed review work will be useful to know the current status of nanostructure devices simulations and the work that is carried out in various centers to understand the physics and transport phenomena occurring in the nanoscale and better design of nanostructured devices.
Abstract: Theory, modeling, and simulation provide investigative tools that support nanotechnology. Multi scale modeling is essential for exploring the numerous, new technology possibilities that research in nanoscience is creating. The purpose of the proposed review work is to explore models and techniques for designing and controlling nanostructured device...
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A Theoretical Study of the Electronic Properties of Cd1-xZnxS quantum Dot Superlattices
Saber Marzougui,
Nabil Safta
Issue:
Volume 2, Issue 3, May 2014
Pages:
45-49
Received:
15 May 2014
Accepted:
26 May 2014
Published:
10 June 2014
Abstract: The present work is aimed to investigate theoretically the electronic properties of superlattices based on Cd1-xZnxS quantum dots embedded in an insulating material. This system, considered as a series of flattened cylindrical quantum dots with a finite barrier at the boundary, is studied using the tight binding approximation. The ground miniband width and the longitudinal effective mass have been computed, for the electrons, versus the Zn composition and the inter-quantum dot separation as well. An analysis of the results shows that the Zn compositions x = 0.4 and x = 0.6 are appropriate to give rise a superlattice behavior for conduction electrons in a range of inter –sheet separations studied.
Abstract: The present work is aimed to investigate theoretically the electronic properties of superlattices based on Cd1-xZnxS quantum dots embedded in an insulating material. This system, considered as a series of flattened cylindrical quantum dots with a finite barrier at the boundary, is studied using the tight binding approximation. The ground miniband w...
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Biogenic Synthesis of Silver Nanoparticles Using Choerospondias Axillaris and its Synergistic Action with Streptomycin
Gunjan Bisht,
Himraj Parajuli,
Roshan Baral,
Ritesh Thapa
Issue:
Volume 2, Issue 3, May 2014
Pages:
50-55
Received:
27 April 2014
Accepted:
3 June 2014
Published:
20 June 2014
Abstract: This paper mainly focus on combined action of green as well as citrate synthesized silver nanoparticles (AgNPs) and streptomycin, an antibiotic. The synergistic actions of citrate stabilized silver nanoparticles (AgNPs@chem) were compared with that of Nepali hog plum Choerospondias axillaris (Lapsi) synthesized silver nanoparticles (AgNPs@plant), together with action of antibiotic on selected bacterial strains of Escherichia coli and Salmonella typhi. This showed an increase in the action of antibiotic. The size of the synthesized silver nanoparticles was measured by Transmission Electron Microscope (TEM) and X-ray diffraction (XRD).
Abstract: This paper mainly focus on combined action of green as well as citrate synthesized silver nanoparticles (AgNPs) and streptomycin, an antibiotic. The synergistic actions of citrate stabilized silver nanoparticles (AgNPs@chem) were compared with that of Nepali hog plum Choerospondias axillaris (Lapsi) synthesized silver nanoparticles (AgNPs@plant), t...
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Influence of Nanoparticles in PZT Ferroelectric Material Properties and Their Applications to Memory Devices
Kurapati Kurapati Srinivas
Issue:
Volume 2, Issue 3, May 2014
Pages:
56-62
Received:
15 April 2014
Accepted:
9 June 2014
Published:
20 June 2014
Abstract: Ferroelctrics are technologically important materials, particularly for their applications in ferroelectric random access memory, based on semiconductor integrated technology have been a great success. Furthermore, these RAMS are very sensitive to radiation and this is detrimental for military and space applications. The properties of the layered perovskite ferroelectrics can be enhanced by addition or substitution of alternative cations. Among the important ferroelectric materials lead zirconate titanate (PZT), which is part of the solid solution formed between ferroelectric lead titanate and anti-ferroelectric lead zirconate with different compositions are used for different applications. Recent works indicate the influence of nanoparticles in PZT properties like decrease of synthesizing temperature, electrical conductivity and low dielectric loss. These materials will be the future ferroelectric materials for noval applications. The present paper Include a thorough study of these materials to finding out reasons for the improvement ferroelectric material properties in the nano scale and their optimization techniques for better applications.
Abstract: Ferroelctrics are technologically important materials, particularly for their applications in ferroelectric random access memory, based on semiconductor integrated technology have been a great success. Furthermore, these RAMS are very sensitive to radiation and this is detrimental for military and space applications. The properties of the layered p...
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