Nanostructured Lead, Cadmium, and Silver Sulfides
Structure, Nonstoichiometry and Properties
Samenvatting
This book presents and analyzes the influence of small size particles of lead, cadmium and silver sulfide on the properties of nonstoichiometric semiconductors. Important nonstoichiometry aspects in nanostructures are discussed, such as the distribution of sulfur atoms in nanofilms, a non-periodic distribution of the atomic planes in nanoparticles, interdependent changes in crystal structure of nanocrystalline material. Tuning the stoichiometry allows to obtain superionic conductivity and catalytic activity under visible light. The wavelength of the luminescence of nanoparticles changes with the size of the nanoparticles. Various methods to prepare nanostructured sulfides are described. Special attention is given to the hydrochemical bath deposition as a universal method for the synthesis of sulfides as nanofilms, stable colloidal solutions, quantum dots, isolated nanoparticles with a protective shell and heteronanostructures. The effect of nanoparticle size and nonstoichiometry on the band gap, optical and thermal properties of nanostructured sulfides is also considered. The novel applications of sulfide nanoparticles in nanoelectronics, catalysis, nanobiology and nanomedicine are sketched.
Specificaties
Inhoudsopgave
<p>PREFACE </p>
<p>References </p>
<p>1 SIZE CHARACTERIZATION OF NANOSTRUCTURED </p>
<p> MATERIALS </p>
<p>1.1 Concept of Nanostructured Material </p>
<p>1.2 Methods of Evaluation of the Size of Small Particles </p>
<p>1.2.1 Electron Microscopy </p>
<p>1.2.2 X-Ray Diffraction Method </p>
<p>1.2.3 Sedimentation, Photon Correlation Spectroscopy, </p>
<p>Gas Adsoption, and Gas Filtration </p>
<p>References </p>
<p>2 NANOSTRUCTURED LEAD SULFIDE PbS </p>
<p>2.1 Methods for the Preparation of Nanostructured Lead Sulfide: </p>
<p> From Colloidal Solutions to Thin Films </p>
<p>2.1.1 Colloidal Solutions of Lead Sulfide Nanoparticles </p>
<p>2.1.2 Analysis of the Formation Conditions of Lead Sulfide in </p>
<p>Aqueous Solutions </p>
<p>2.1.3 Deposition of Lead Sulfide Nanopowders </p>
<p>2.1.4 Deposition of Lead Sulfide Particles with Different Morphology </p>
<p>2.1.5 Lead Sulfide Quantum Dots </p>
<p>2.1.6 Nanostructured Lead Sulfide Films </p>
<p>2.2 Crystal Structures of Nanoparticles, Nanopowders, and Nanofilms of </p>
<p>Lead Sulfide </p>
2.2.1 Crystal Structure of Nanopowders and Quantum Dots <p></p>
<p>2.2.2 Crystal Structures of Nanofilms </p>
<p>2.2.3 Correlations of Sulfur Atoms S in PbS Nanostructured Films </p>
<p>2.3 Properties of Nanostructured Lead Sulfide </p>
2.3.1 Optical Properties and Band Gap <p></p>
<p>2.3.2 Thermal Properties </p>
<p>2.3.3 Stability of Nanostructured Lead Sulfide </p>
2.4 Application of Nanostructured Lead Sulfide <p></p>
<p>References </p>
<3 NANOSTRUCTURED CADMIUM SULFIDE CdS <p></p>
<p>3.1 Chemical Deposition of Nanostructured Cadmium Sulfide CdS </p>
<p>3.1.1 Formation of Aqueous Colloidal Solutions of CdS </p>
<p>3.1.2 Formation of CdS Nanoparticles </p>
<p>3.1.3 Deposition of CdS Film on Substrates </p>
<p>3.2 Synthesis of CdS Nanoparticles in Glass Matrix </p>
<p>3.3 Features of Crystal Structure of CdS Nanoparticles </p>
<p>3.3.1 Non-periodicity in Sulfide Nanoparticles with Close-pace</p>
<p>Structures </p>
<p>3.3.2 Visualization of “Average” Long-range Order in the </p>
<p>Non-periodic Structure of CdS Nanoparticle </p>
<p>3.4 Optical Properties of Nanostructured CdS </p>
<p>References </p>
<p>4 NANOSTRUCTURED SILVER SULFIDE Ag2S </p>
<p>4.1 Methods of Synthesis of Nanostructured Silver Sulfide Ag<sub>2</sub>S </p>
<p>4.1.1 Synthesis by Decomposition of Molecular Precursors </p>
<p>4.1.2 Synthesis of Nanostructures Silver Sulfide with Different </p>
<p>Morphology </p>
<p>4.1.3 Biotechnological and Other Methods for Preparing </p>
<p>Nanostructured Ag<sub>2</sub>S Silver Sulfide </p>
<p>4.2 Crystal Structure of Coarse-Crystalline and Nanostructured </p>
<p>Ag<sub>2</sub>S Silver Sulfide </p>
<p>4.2.1 Crystal Structure of Artificial Coarse-Crystalline a-Ag<sub>2</sub>S </p>
<p>Silver Sulfide </p>
<p>4.2.2 Crystal Structure and Nonstoichiometry of Nanostructured </p>
<p>a-Ag<sub>2</sub>S Silver Sulfide </p>
<p>4.2.3 In Situ High-Temperature Study of “Acanthite a-Ag<sub>2</sub>S – </p>
<p>Argentite <b-ag<sub>2S” Phase Transformation </b-ag<sub></p>
<p>4.2.4 Thermal Expansion of Acanthite a-Ag<sub>2S and Argentite b-Ag<sub>2</sub>S </sub></p>
<p>4.3 Universal Approach to Synthesis of Silver Sulfide in the Form </p>
<p>of Nanopowders, Quantum Dots, Core-Shell Nanoparticles, </p>
<p>and Heteronanostructures </p>
<p>4.3.1 Green Synthesis of Nanostructured Ag<sub>2</sub>S Without Hazardous </p>
<p>Substances </p>
<p>4.3.2 Coarse-crystalline Ag<sub>2</sub>S powders </p>
<p>4.3.3 Deposited Ag<sub>2</sub>S Nanopowders </p>
<p>4.3.4 Colloidal Solutions of Ag<sub>2</sub>S Quantum Dots </p>
<p>4.3.5 Core-Shell Ag<sub>2</sub>S@C Nanoparticles </p>
<p>4.3.6 Ag<sub>2</sub>S/Ag heteronanostructures </p>
<p>4.4 Hydrochemical Bath Deposition: Advantages and Challenges </p>
<p>Appendix </p>
<p>References </p>
<p>NAME INDEX </p>
<p>SUBJECT INDEX </p>
<p></p>

