Crystallization And Growth Of Colloidal Nanocrystals PDF Download
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Author | : Edson Roberto Leite |
Publisher | : Springer Science & Business Media |
Total Pages | : 101 |
Release | : 2011-11-17 |
Genre | : Science |
ISBN | : 1461413087 |
Download Crystallization and Growth of Colloidal Nanocrystals Book in PDF, ePub and Kindle
Since the size, shape, and microstructure of nanocrystalline materials strongly impact physical and chemical properties, the development of new synthetic routes to nanocrystals with controlled composition and morphology is a key objective of the nanomaterials community. This objective is dependent on control of the nucleation and growth mechanisms that occur during the synthetic process, which in turn requires a fundamental understanding of both classical nucleation and growth and non-classical growth processes in nanostructured materials. Recently, a novel growth process called Oriented Attachment (OA) was identified which appears to be a fundamental mechanism during the development of nanoscale materials. OA is a special case of aggregation that provides an important route by which nanocrystals grow, defects are formed, and unique—often symmetry-defying—crystal morphologies can be produced. This growth mechanism involves reversible self-assembly of primary nanocrystals followed by reorientation of the assembled nanoparticles to achieve structural accord at the particle-particle interface, the removal of adsorbates and solvent molecules, and, finally, the irreversible formation of chemical bonds to produce new single crystals, twins, and intergrowths. Crystallization and Growth of Colloidal Nanocrystals provides a current understanding of the mechanisms related to nucleation and growth for use in controlling nanocrystal morphology and physical-chemical properties, and is essential reading for any chemist or materials scientist with an interest in using nanocrystals as building blocks for larger structures. This book provides a compendium for the expert reader as well as an excellent introduction for advanced undergraduate and graduate students seeking a gateway into this dynamic area of research.
Author | : |
Publisher | : Springer |
Total Pages | : 104 |
Release | : 2011-11-17 |
Genre | : |
ISBN | : 9781461413097 |
Download Crystallization and Growth of Colloidal Nanocrystals Book in PDF, ePub and Kindle
Author | : Philip G. Born |
Publisher | : Springer Science & Business Media |
Total Pages | : 139 |
Release | : 2013-05-23 |
Genre | : Science |
ISBN | : 3319002309 |
Download Crystallization of Nanoscaled Colloids Book in PDF, ePub and Kindle
This thesis deals with the processes that create ordered assemblies from disordered nanoparticles. Ordered packings of nanoscale particles can exhibit unusual properties. This work investigates the self-assembly of such particles, a process widely employed for the generation of ordered structures, but not yet well understood. In situ methods are used to observe the assembly of sub-micron polymer lattices and sub-10 nm gold particles into crystalline monolayers and aggregates. On the basis of these results, the book develops new models that describe the competition between different influences, such as thermal agitation and directional forces. It suggests necessary criteria that lead to the emergence of order.
Author | : Helmut Cöelfen |
Publisher | : John Wiley & Sons |
Total Pages | : 288 |
Release | : 2008-07-31 |
Genre | : Science |
ISBN | : 0470994592 |
Download Mesocrystals and Nonclassical Crystallization Book in PDF, ePub and Kindle
Through both explanation and discussion, this title presents a complete review into mesocrystals, and accurately describes this relatively new study of established materials. This book also provides an introduction to other areas of crystallisation including self-assembly, classical crystallisation and colloidal crystals. Key features: Description of crystals as well as their formation processes and ways to modify them. Examines new ways towards the design of new materials and aids comprehension of the building principles of biominerals. Helps to explain many unusual observations made in the study of crystallisation. Written by the professionals in this subject ‘Mesocrystals: New Self-Assembled Structures’ outlines the future potential of this topic within a variety of disciplines including engineering science, physics and chemistry, making it a versatile and valuable text.
Author | : Nathan E. Stott |
Publisher | : |
Total Pages | : 175 |
Release | : 2004 |
Genre | : |
ISBN | : |
Download Novel Synthetic Routes to High-quality II-VI Colloidal Nanocrystals Book in PDF, ePub and Kindle
Nanometer-sized colloidal quantum dots, or nanocrystals, are of current scientific interest based on their mesoscopic properties as an intermediate state between molecular and bulk materials. Particles sizes of semiconductor materials smaller than the Bohr exciton radius result in a quantum confinement effect that allows the optical properties to be tuned within the band energies of the bulk material such that smaller sizes lead to higher energy transitions at the band edge. The small sizes and tunable monochromatic emission properties make these nanocrystals desirable for a variety of applications, both realized and sought after. Research to further the exploitation of quantum dots includes such applications as biological fluorescence tracer tags and imaging agents, high resolution displays, light emitting diodes (LEDs), low bandwidth lasers, photovoltaic solar cells, and future "nanoelectronics." The thesis of this dissertation is that high-quality II-VI colloidal nanocrystals, CdSe and (CdSe)ZnS in particular, can be synthesized using mild precursors, exerting fine control though the proper selection of ligands. Chapters 2 and 3 show that extremely high-quality CdSe nanocrystals can be synthesized using mild precursors such as Cd(acac)2 and Cd(OH)2 while achieving higher quantum efficiencies, higher reaction yields, smaller size-distributions, and with finer control over the final size in comparison to previous methods. In addition to the batch synthesis, Chapter 3 shows the development of a microfluidic flow reactor using a mixed highboiling STP liquid solvent. It is found that the temperature, flow rate, and precursor ratios are parameters that can be used to control the size and size-distributions of the final products. The CdSe cores are overcoated with ZnS from Zn(acac)2 to form highly stable and highly luminescent (core)shell colloids in Chapter 4. Chapter 5 develops qualitative arguments based on the Drago-Wayland extension of Hard-Soft Acid-Base Theory to describe the actions of surfactant ligands in the growth solution. It is shown that crystal growth inhibitors can be used to finely control nanocrystal growth, and the precursor-to-inhibitor ratio is fundamental to the final size.
Author | : C. N. R. Rao |
Publisher | : John Wiley & Sons |
Total Pages | : 420 |
Release | : 2007-09-24 |
Genre | : Science |
ISBN | : 3527611371 |
Download Nanomaterials Chemistry Book in PDF, ePub and Kindle
With this handbook, the distinguished team of editors has combined the expertise of leading nanomaterials scientists to provide the latest overview of this field. They cover the whole spectrum of nanomaterials, ranging from theory, synthesis, properties, characterization to application, including such new developments as quantum dots, nanoparticles, nanoporous materials, nanowires, nanotubes, and nanostructured polymers. The result is recommended reading for everybody working in nanoscience: Newcomers to the field can acquaint themselves with this exciting subject, while specialists will find answers to all their questions as well as helpful suggestions for further research.
Author | : Alexander L. Efros |
Publisher | : Springer Science & Business Media |
Total Pages | : 277 |
Release | : 2013-06-29 |
Genre | : Technology & Engineering |
ISBN | : 1475736770 |
Download Semiconductor Nanocrystals Book in PDF, ePub and Kindle
A physics book that covers the optical properties of quantum-confined semiconductor nanostructures from both the theoretical and experimental points of view together with technological applications. Topics to be reviewed include quantum confinement effects in semiconductors, optical adsorption and emission properties of group IV, III-V, II-VI semiconductors, deep-etched and self assembled quantum dots, nanoclusters, and laser applications in optoelectronics.
Author | : Vladimir Lesnyak |
Publisher | : Frontiers Media SA |
Total Pages | : 110 |
Release | : 2020-01-06 |
Genre | : |
ISBN | : 2889632695 |
Download Colloidal Semiconductor Nanocrystals: Synthesis, Properties, and Applications Book in PDF, ePub and Kindle
Author | : Kallum M. Koczkur |
Publisher | : American Chemical Society |
Total Pages | : 164 |
Release | : 2020-07-31 |
Genre | : Science |
ISBN | : 0841299013 |
Download Metal Nanocrystals Book in PDF, ePub and Kindle
Our society depends heavily on metals. They are ubiquitous construction materials, critical interconnects in integrated circuits, common coinage materials, and more. Excitingly, new uses for metals are emerging with the advent of nanoscience, as metal crystals with nanoscale dimensions can display new and tunable properties. The optical and photothermal properties of metal nanocrystals have led to cancer diagnosis and treatment platforms now in clinical trials, while, at the same time, the ability to tune the surface features of metal nanocrystals is giving rise to designer catalysts that enable more sustainable use of precious resources. These are just two examples of how metal nanocrystals are addressing important social needs.
Author | : George V. Karas |
Publisher | : Nova Publishers |
Total Pages | : 170 |
Release | : 2005 |
Genre | : Science |
ISBN | : 9781594545399 |
Download New Developments in Crystal Growth Research Book in PDF, ePub and Kindle
New Developments In Crystal Growth