Photocurrent Enhancement By Surface Plasmon Resonance Of Gold Nanoparticles In Single Gallium Nitride Nanowires

Author: Jency Pricilla Sundararajan
Editor:
ISBN:
File Size: 38,35 MB
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This dissertation presents the study on the electron transport properties of individual gallium nitride (GaN) nanowires grown by a vapor liquid solid (VLS) process. Conductive atomic force microscopy (C-AFM) and two-probe methods has been used to investigate the variation in electrical conductance of GaN nanowires as a function of nanowire length (5 [mu]m to 40 [mu]m), nanowire diameter (80 nm to 400 nm) and gold (Au) nanoparticle decoration on the surface of nanowires. We also report the photoconducting and photo-excitation properties of individual GaN nanowires and examine the influence of nanowire dimensions and Au nanoparticle decoration with respect to different wavelength of laser light (405 nm (blue), 532 nm (green), and 632.8 nm (red)) used. Standard photolithography techniques are applied to pattern the two-point Cr/Au (50 run/ 150 nm) electrodes on single GaN nanowires lying on SiO2 substrate. Experimental results demonstrated the deviation in electrical properties of individual GaN nanowires due to nanowire geometry, surface modification and light exposure in the visible range. Photoresponse of bare GaN nanowires as a function of nanowire diameter and a constant laser power (10mW/cm 2 ), increase smoothly with increasing diameter and from longer to shorter wavelengths of light. In the case of Au/GaN nanowires, the enhancement in photocurrent is effectively equivalent to the values obtained prior to metallization for diameters less than 200 nm. Above a critical diameter of ~200nm the photocurrent of Au/GaN nanowires exhibit diameter dependent enhancement of 100% to 500% larger than their dark current values. Time dependent photocurrent measurements revealed a faster response time in Au/GaN nanowires compared to the bare GaN nanowires, which make them suitable candidates for opto-electronic switches. This study will have a far reaching impact on the development of nanophotonic devices and will stimulate further research on the rapidly developing field of surface plasmon nanophotonics.

Forum Bildverarbeitung

Author: Fernando Puente León
Editor: KIT Scientific Publishing
ISBN: 3866445784
File Size: 65,77 MB
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Issues In Applied Physics 2011 Edition

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Editor: ScholarlyEditions
ISBN: 1464963363
File Size: 22,90 MB
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Issues in Applied Physics / 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Applied Physics. The editors have built Issues in Applied Physics: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Applied Physics in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Applied Physics: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.

Thermoelektrik

Author: Daniel Jänsch
Editor: expert verlag
ISBN: 9783816928775
File Size: 69,68 MB
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Solar Cells Research And Development Of Solar Cells

Author: Stanislav Kolisnychenko
Editor: Trans Tech Publications Ltd
ISBN: 3038269417
File Size: 37,56 MB
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Solar energy possesses enormous potential as a source of affordable and inexhaustible energy. Solar energy is utilized with the help of various technologies and, in particular, photovoltaic technology, based on photovoltaic elements which provide direct conversion of solar energy into electricity. The compilation “Research and Development of Solar Cells” covers papers concerning various aspects of the design, research and manufacture of photovoltaic cells, as they have been selected from the library of Trans Tech Publications Inc. from 2010 to 2014 inclusive. All materials are presented in five chapters: Chapter 1: Silicon Based Solar Cells Chapter 2: Dye-Sensitized Cells Chapter 3: Other Types of Solar Cells Chapter 4: Technology of Quantum Dots Chapter 5: Engineering Support in Manufacturing of Solar Cells, which display a wide variety of challenges and achievements in the field of photovoltaic cells engineering.

Issues In Chemistry And General Chemical Research 2011 Edition

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Editor: ScholarlyEditions
ISBN: 1464963290
File Size: 14,71 MB
Format: PDF, Mobi
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Issues in Chemistry and General Chemical Research: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Chemistry and General Chemical Research. The editors have built Issues in Chemistry and General Chemical Research: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Chemistry and General Chemical Research in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Chemistry and General Chemical Research: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.