Meet the editor

Prof. Mohamed Nageeb Rashed is Professor of Analytical and Environmental Chemistry, Faculty of Science, Aswan University, Egypt, where he previously served as vice-dean for environmental affairs. In 1989, he received a Ph.D. in Environmental Analytical Chemistry from Assiut University, Egypt. His research interests are in analytical and environmental chemistry with special emphasis on monitoring and assessing biological

trace elements and toxic metals in human blood, urine, water, crops, vegetables, and medicinal plants; relationships between environmental heavy metals and human diseases; uses of biological indicators for monitoring water pollution; environmental chemistry of lakes, rivers, and well water; water and wastewater treatment by adsorption and photocatalysis techniques; soil and water pollution monitoring, control, and treatment; and advanced oxidation treatments using photocatalysis, nanocatalysts, nanocomposites, and adsorption techniques for water and wastewater treatment. Dr. Rashed supervised several MSc and Ph.D. theses in the field of analytical and environmental chemistry. He was selected as an examiner for several Ph.D. theses in analytical chemistry from India, Kazakhstan, and Botswana. He has published about ninety scientific papers in peer-reviewed international journals, as well as several papers in national and international conferences. He participated as an invited speaker at thirty international conferences worldwide. Dr. Rashed is the editor-in-chief and an editorial board member for several international journals in the fields of chemistry and environment. His society membership includes several national and international societies. He received the Egyptian State Award for Environmental Researches in 2001 and the Aswan University Merit Award for Basic Science in 2020.

Contents

**Section 1**

A Review *by Randhir Singh*

**Section 2**

*and Kiran D. Pawar*

by Ultrashort Light Pulses

*by Ranganatha Sudhakar*

*by Marina Stygar Lopes*

**Preface XI**

Different Technique for Synthesis of Colloids **1**

**Chapter 1 3**

**Chapter 2 33**

**Chapter 3 43**

**Chapter 4 63**

Structure, Dynamics and Colloidal Stability **81**

**Chapter 5 83**

**Chapter 6 93**

**Chapter 7 123**

Recent Progress in the Electrochemical Exfoliation of Colloidal Graphene:

*by Jesica María José Santillán, David Muñetón Arboleda, Valeria Beatriz Arce,* 

Optimization of Biogenic Synthesis of Colloidal Metal Nanoparticles *by Disha N. Moholkar, Darshana V. Havaldar, Rachana S. Potadar* 

A Simple and "Green" Technique to Synthesize Metal Nanocolloids

Gemini Imidazolinium Surfactants: A Versatile Class of Molecules

*Lucía Beatriz Scaffardi and Daniel Carlos Schinca*

*by Kajol Bhati, Divya Bajpai Tripathy and Anjali Gupta*

Aerogels Utilization in Electrochemical Capacitors

Structure and Dynamics of Aqueous Dispersions

*by Tatiana Yakhno and Vladimir Yakhno*

Colloidal Stability of Cellulose Suspensions
