Cadmium Telluride Quantum Dots

Author : John Donegan
Publisher : CRC Press
ISBN 13 : 9814316091
Total Pages : 244 pages
Book Rating : 4.95/5 ( download)

DOWNLOAD NOW!

Download or read book Cadmium Telluride Quantum Dots written by John Donegan and published by CRC Press. This book was released on 2016-04-19 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last two decades, semiconductor quantum dots-small colloidal nanoparticles-have garnered a great deal of scientific interest because of their unique properties. Among nanomaterials, CdTe holds special technological importance as the only known II-VI material that can form conventional p-n junctions. This makes CdTe very important for the dev

Author : Simona Clichici
Publisher :
ISBN 13 : 9781789846171
Total Pages : pages
Book Rating : 4.7X/5 ( download)

DOWNLOAD NOW!

Download or read book Nanomaterials written by Simona Clichici and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Gerasimos Konstantatos
Publisher : Cambridge University Press
ISBN 13 : 0521198267
Total Pages : 329 pages
Book Rating : 4.64/5 ( download)

DOWNLOAD NOW!

Download or read book Colloidal Quantum Dot Optoelectronics and Photovoltaics written by Gerasimos Konstantatos and published by Cambridge University Press. This book was released on 2013-11-07 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Captures the most up-to-date research in the field, written in an accessible style by the world's leading experts.

Author : Celso de Mello Donegá
Publisher : Springer
ISBN 13 : 3662448238
Total Pages : 303 pages
Book Rating : 4.36/5 ( download)

DOWNLOAD NOW!

Download or read book Nanoparticles written by Celso de Mello Donegá and published by Springer. This book was released on 2014-10-21 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book can be roughly divided into three parts: fundamental physico-chemical and physical principles of Nanoscience, chemistry and synthesis of nanoparticles, and techniques to study nanoparticles. The first chapter is concerned with the origin of the size dependence of the properties of nanomaterials, explaining it in terms of two fundamental nanoscale effects. This chapter also serves as a general introduction to the book, briefly addressing the definition and classification of nanomaterials and the techniques used to fabricate and study them. Chapter 2 lays out the theoretical framework within which to understand size effects on the properties of semiconductor nanocrystals, with particular emphasis on the quantum confinement effect. The optical properties of metal nanoparticles and metal nanostructures (periodic lattices) are discussed in Chapter 3. Chapter 4 is devoted to nanoporous materials, treating in detail their synthesis, structure and functional properties, as well as the physical properties of liquids confined in nanopores. The preparation methods, characterization techniques, and applications of supported nanoparticles are covered in Chapter 5. The sixth Chapter presents the essential physical-chemical concepts needed to understand the preparation of colloidal inorganic nanoparticles, and the remarkable degree of control that has been achieved over their composition, size, shape and surface. The last four Chapters are dedicated to a few selected characterization techniques that are very valuable tools to study nanoparticles. Chapter 7 concentrates on electron microscopy techniques, while Chapter 8 focuses on scanning probe microscopy and spectroscopy. Electron paramagnetic resonance (EPR) based spectroscopic techniques and their application to nanoparticles are explored in Chapter 9. Finally, Chapter 10 shows how solution Nuclear Magnetic Resonance (NMR) spectroscopic techniques can be used to unravel the surface chemistry of colloidal nanoparticles.

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.13/5 ( download)

DOWNLOAD NOW!

Download or read book Synthesis of Cadmium Telluride Quantum Wires and the Similarity of Their Band Gaps to Those of Equidiameter Cadmium Telluride Quantum Dots written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High-quality colloidal CdTe quantum wires having purposefully controlled diameters in the range of 5-11 nm are grown by the solution-liquid-solid (SLS) method, using Bi-nanoparticle catalysts, cadmium octadecylphosphonate and trioctylphosphine telluride as precursors, and a TOPO solvent. The wires adopt the wurtzite structure, and grow along the [002] direction (parallel to the c axis). The size dependence of the band gaps in the wires are determined from the absorption spectra, and compared to the experimental results for high-quality CdTe quantum dots. In contrast to the predictions of an effective-mass approximation, particle-in-a-box model, and previous experimental results from CdSe and InP dot-wire comparisons, the band gaps of CdTe dots and wires of like diameter are found to be experimentally indistinguishable. The present results are analyzed using density functional theory under the local-density approximation by implementing a charge-patching method. The higher-level theoretical analysis finds the general existence of a threshold diameter, above which dot and wire band gaps converge. The origin and magnitude of this threshold diameter is discussed.

Author : John Callan
Publisher : CRC Press
ISBN 13 : 9814316008
Total Pages : 232 pages
Book Rating : 4.02/5 ( download)

DOWNLOAD NOW!

Download or read book Quantum Dot Sensors written by John Callan and published by CRC Press. This book was released on 2013-01-24 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consisting of six chapters, written by experts in their field, this book charts the progress made in the use of quantum dots as the signaling component in optical sensors since their discovery in the early 1980s. In particular, it focuses on CdS-, CdSe-, and CdTe-type QDs due to their emission in the visible region of the electromagnetic spectrum. The book begins by detailing the range of methods currently used for the preparation and passivation of core/core–shell quantum dots and follows with a discussion on their electrochemical properties and potential toxicity. The book culminates by focusing on how electron and energy transfer mechanisms can be utilized to generate a range of quantum dot-based probes. This is the first text of its kind dedicated to quantum dot-based sensors and will appeal to those readers who have an interest in working with these versatile nanoparticles.

Author : Sebastian Mackowski
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.06/5 ( download)

DOWNLOAD NOW!

Download or read book CdTe/ZnTe Quantum Dots - Growth and Optical Properties written by Sebastian Mackowski and published by . This book was released on 2002 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper gives an overview of molecular beam epitaxy (MBE) growth of and the optical properties of Cadmium Telluride (CdTe) quantum dots grown on Zinc Telluride (ZnTe) by self-assembly. It is shown that quantum dots in this material system can be obtained either by depositing CdTe at a high substrate temperature or by subjecting CdTe layer to a healing process, up to 70 seconds long before its capping or, eventually, by applying these two methods simultaneously. Moreover, it is found that one can also use the atomic layer epitaxy method to achieve the formation. From optical measurements performed on large quantum dot ensembles it is found that the quantum dot emission is much broader than that of quantum wells, and that it is observable up to much higher temperatures, which indicates strong exciton localization. The latter is also evidenced by an insensitivity of the decay time of the exciton recombination (^3O0 ps) to the temperature. From the presence of a second, very long decay time (^5 ns) and from disappearance of the sharp lines related to recombination in single dots, the acoustic phonon scattering of excitons is found to play an important role in these quantum dot structures. From a magnetic field dependence of the single dot emission energy, the exciton effective g-factor and spatial extension of the exciton wave function are deduced to be equal to -3 and 3 nanometers, respectively. Both the g-factor and the value of the diamagnetic shift are found to be independent of the energy of the quantum dot emission at Beta=Omicron Tau and of the in-plane symmetry of its potential. (11 figures, 35 refs.).

Author : Janos Schanda
Publisher : John Wiley & Sons
ISBN 13 : 9780470175620
Total Pages : 390 pages
Book Rating : 4.21/5 ( download)

DOWNLOAD NOW!

Download or read book Colorimetry written by Janos Schanda and published by John Wiley & Sons. This book was released on 2007-10-12 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colorimetry: Understanding the CIE System summarizes and explains the standards of CIE colorimetry in one comprehensive source. Presents the material in a tutorial form, for easy understanding by students and engineers dealing with colorimetry. Provides an overview of the area of CIE colorimetry, including colorimetric principles, the historical background of colorimetric measurements, uncertainty analysis, open problems of colorimetry and their possible solutions, etc. Includes several appendices, which provide a listing of CIE colorimetric tables as well as an annotated list of CIE publications. Commemorates the 75th anniversary of the CIE's System of Colorimetry.

Author : Eram Sharmin
Publisher : BoD – Books on Demand
ISBN 13 : 9535136275
Total Pages : 242 pages
Book Rating : 4.79/5 ( download)

DOWNLOAD NOW!

Download or read book Spectroscopic Analyses written by Eram Sharmin and published by BoD – Books on Demand. This book was released on 2017-12-06 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents developments and applications of these methods, such as NMR, mass, and others, including their applications in pharmaceutical and biomedical analyses. The book is divided into two sections. The first section covers spectroscopic methods, their applications, and their significance as characterization tools; the second section is dedicated to the applications of spectrophotometric methods in pharmaceutical and biomedical analyses. This book would be useful for students, scholars, and scientists engaged in synthesis, analyses, and applications of materials/polymers.

Author : Morteza Sasani Ghamsari
Publisher : BoD – Books on Demand
ISBN 13 : 9535135759
Total Pages : 171 pages
Book Rating : 4.53/5 ( download)

DOWNLOAD NOW!

Download or read book Quantum-dot Based Light-emitting Diodes written by Morteza Sasani Ghamsari and published by BoD – Books on Demand. This book was released on 2017-10-25 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum dot-based light emitting diodes were assigned to bringing together the latest and most important progresses in light emitting diode (LED) technologies. In addition, they were dedicated to gain the perspective of LED technology for all of its advancements and innovations due to the employment of semiconductor nanocrystals. Highly selective, the primary aim was to provide a visual source for high-urgency work that will define the future directions relating to the organic light emitting diode (OLED), with the expectation for lasting scientific and technological impact. The editor hopes that the chapters verify the realization of the mentioned aims that have been considered for editing of this book. Due to the rapidly growing OLED technology, we wish this book to be useful for any progress that can be achieved in future.