tailieunhanh - STATE‐OF‐THE‐ART OF QUANTUM DOT SYSTEM FABRICATIONS

QDs play an important role mainly in the imaging and as highly fluorescent probes for biological sensing that have better sensitivity, longer stability, good biocompatibility, and minimum invasiveness. The fluorescent properties of QDs arise from the fact, that their excitation states/band gaps are spatially confined, which results in physical and optical properties intermediate between compounds and single molecules. Depending on chemical composition and the size of the core which determines the quantum confinement, the emission peak can vary from UV to NIR wavelengths (400–1350 nm). In other words, the physical size of the band gap determines the photon’s emission wavelength: larger QDs having smaller band gaps emit red. | STATE-OF-THE-ART OF QUANTUM DOT SYSTEM FABRICATIONS Edited byAmeenah Al-Ahmadi I B STATE-OF-THE-ART OF QUANTUM DOT SYSTEM FABRICATIONS Edited byAmeenah Al-Ahmadi State-of-the-Art of Quantum Dot System Fabrications Edited by Ameenah Al-Ahmadi Published by InTech JanezaTrdine 9 51000 Rijeka Croatia Copyright 2012InTech All chapters are Open Access distributed under the Creative Commons Attribution license which allows users to download copy and build upon published articles even for commercial purposes as long as the author and publisher are properly credited which ensures maximum dissemination and a wider impact of our publications. After this work has been published by InTech authors have the right to republish it in whole or part in any publication of which they are the author and to make other personal use of the work. Any republication referencing or personal use of the work must explicitly identify the original source. As for readers this license allows users to download copy and build upon published chapters even for commercial purposes as long as the author and publisher are properly credited which ensures maximum dissemination and a wider impact of our publications. Notice Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published chapters. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials instructions methods or ideas contained in the book. Publishing Process ManagerMolly Kaliman Technical EditorTeodoraSmiljanic Cover DesignerInTech Design Team First published June 2012 Printed in Croatia A free online edition of this book is available at Additional hard copies can be obtained from orders@ State-of-the-Art of Quantum Dot System Fabrications Edited by Ameenah Al-Ahmadi p.

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