Silver Nanoparticles: Synthesis, Properties, and Applications

✍ Scribed by Facibeni A.

• Publisher: Jenny Stanford Publishing
• Year: 2023
• Tongue: English
• Leaves: 275
• Category: Library

✦ Synopsis

The use of silver as an antibacterial agent has been known for thousands of years. This effect can be amplified by simply reducing the size of silver particles to the nanoscale, with the added advantage of a reduction in cost and toxicity. Application of silver nanoparticles to textiles can bring considerable advantages, especially for medical support materials or for materials that cannot be washed daily. This book describes a novel synthesis method that the author calls in situ , in which these nanoparticles are obtained directly on materials. The method is simple and easy to apply and can also be considered green because the reducing agent involved is ascorbic acid, commonly known as vitamin C. It neither requires special modifications in the industrial equipment nor special pressure or temperature conditions. It can be used to grow other metals or metal oxides on a material. The book showcases studies carried out on silver nanoparticles by the author over several years, not only in terms of the synthesis but also the morphological characterization of the substrate to which they were applied. It exhibits SEM images displaying the homogeneity of the silver coating, highlighting that sometimes the simplest way is the best way.

✦ Table of Contents

Cover
Half Title
Silver Nanoparticles: Synthesis, Properties, and Applications
Copyright
Contents
Preface
Acknowledgements
1. Once Upon a Time Silver
1.1 Through the History
1.1.1 The Importance of Names
1.1.2 Silver Diffusion in the Antiquity
1.1.3 Main Uses of Silver in the Past and the Present
1.1.3.1 Silverware and jewels
1.1.3.2 The coins around the world
1.1.3.3 Photography
1.1.3.4 Awards and mirrors
1.1.3.5 Brazing and soldering
1.1.3.6 Energy, electronics, medicine
1.1.4 Curiosities
1.2 Learn About Silver
1.2.1 Chemical and Physical Properties of Silver
1.2.2 Silver Extraction and Recovery Methods
1.2.3 Silver Compounds
1.2.4 Silver Coordination Compounds
1.3 Speaking Nano
1.3.1 Observation
1.3.2 Size Effect in Nanoparticles
1.3.2.1 Surface atoms
1.3.2.2 Quantum effect
1.3.2.3 Color
1.4 Today’s Application of Silver Nanoparticles
References
2. Methods for Silver Nanoparticles Production
2.1 Build or Tear Down?
2.1.1 Top-Down Approach
2.1.2 Bottom-Up Approach
2.2 What to Choose Between Chemical and Physical Way?
2.2.1 Physic Methods
2.2.1.1 Thermal evaporation
2.2.1.2 Spark discharge
2.2.1.3 Laser ablation deposition (LAD)
2.2.2 Chemical Methods
2.2.2.1 Chemical vapor deposition
2.2.2.2 Reducing agents
2.2.2.3 Radiation synthesis
2.2.2.4 Electrochemical
2.2.3 Biological Methods
2.3 Green Chemistry
References
3. Textiles and AgNPs
3.1 Textiles Over the Centuries
3.2 Classification
3.2.1 Natural
3.2.1.1 Wool and silk
3.2.1.2 Flax and cotton
3.2.1.3 Others
3.2.1.4 The birth of the loom
3.2.2 Man-Made
3.2.2.1 Art ficial fibers: rayon
3.2.2.2 Synthet c fibers: nylon, polyester, acrilic
3.3 Improve the Performance
3.3.1 Increased Fire Resistance or Flame Retardance
3.3.2 UV Protection
3.3.3 Water, Oil, and Dirt Repellent
3.3.4 Antimicrobial Coatings
3.4 Method to Functionalize AgNPs to Materials
3.4.1 Dipping
3.4.2 Sonochemical
3.4.3 Layer-by-Layer Deposition
References
4. In situ Synthesis of Silver Nanoparticles
4.1 A Long Time Ago
4.2 Colloids
4.2.1 Lyophilic and Lyophobic Colloids
4.3 Fast and Soft Reductant for Silver
4.3.1 The First One: Trisodium Citrate
4.3.1.1 Brief history
4.3.1.2 The mechanism of reduction
4.3.2 The Second One: Ascorbic Acid
4.3.2.1 Brief history
4.3.2.2 The mechanism of reduction
4.4 Experimental Section
4.4.1 Scanning Electron Microscope Images of Various Samples
4.4.1.1 Difference between dipping and in situ
4.5 Different Ways of Application: Wet and Spray
4.5.1 By Solution
4.5.2 By Spraying
References
5. Antibacterial Properties of Silver Nanoparticles
5.1 Introduction
5.2 Kind of Bacteria
5.3 Antibiotics
5.3.1 How to Evaluate the Efficacy of an Antibiotic?
5.4 Diffusion Methods
5.4.1 Antimicrobial Gradient Method (E-test)
5.5 Dilution Methods
5.6 Thin-Layer Chromatography: Bioautography
5.7 Antibacterial Activity of Silver Nanoparticles
5.7.1 Test in vitro Results
5.7.1.1 Agar disk diffusion test
5.7.1.2 AATCC test method 100–2004
5.8 Small News
References
6. An Exciting and Instructive Experience: Academia–Industry Collaboration
6.1 Dyeing
6.2 Mattress Toppers
6.3 Diabetic Socks
6.4 Packaging
6.5 Air Filtration
6.6 Wool
6.7 Electromagnetic Shielding
6.8 More Ideas
References
7. Conclusions and Perspectives at the End of the Line
References
Index