Surfaces of Nanoparticles and Porous Materials

Download Surfaces of Nanoparticles and Porous Materials PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 9780824746681
Total Pages : 814 pages
Book Rating : 4.7/5 (466 download)

DOWNLOAD NOW!


Book Synopsis Surfaces of Nanoparticles and Porous Materials by : James A. Schwarz

Download or read book Surfaces of Nanoparticles and Porous Materials written by James A. Schwarz and published by CRC Press. This book was released on 1999-01-21 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: This innovative reference collects state-of-the-art procedures for the construction and design of nanoparticles and porous material while suggesting appropriate areas of application. Presenting both synthesis and characterization protocols, Surfaces of Nanoparticles and Porous Materials contains over 3000 references, tables, equations, drawings, and photographs. It examines the thermodynamics and kinetics of adsorption involving organic and inorganic liquids, solids, and gaseous media.. Topics include characterization, transport processes, diffusion, and the adsorption of heavy metals, ions, proteins, and pharmaceutical organics.

Nanoporous Materials III

Download Nanoporous Materials III PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0080537227
Total Pages : 711 pages
Book Rating : 4.0/5 (85 download)

DOWNLOAD NOW!


Book Synopsis Nanoporous Materials III by : M. Jaroniec

Download or read book Nanoporous Materials III written by M. Jaroniec and published by Elsevier. This book was released on 2002-05-15 with total page 711 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanoporous Materials III contains the invited lectures and peer-reviewed oral and poster contributions to be presented at the 3rd Conference on Nanoporous Materials, which will be hosted in Ottawa, Canada, June 2002. The work covers complementary approaches to and recent advances in the field of nanostructured materials with pore sizes larger than 1nm, such as periodic mesoporous molecular sieves M41S and FSM16 and related materials including clays, carbon molecular sieves, colloidal crystal templated organic and inorganic materials, porous polymers and sol gels. The broad range of topics covered in relation to the synthesis and characterization of ordered mesoporous materials are of great importance for advanced adsorption, catalytic and separation processes as well as the development of nanotechnology. The contents of this title are based on topics to be discussed by invited lecturers, which deal with periodic mesoporous organosilicas, stability and catalytic activity of aluminosilicate mesostructures, electron microscopy studies of ordered materials, imprinted polymers and highly porous metal-organic frameworks. The other contributions deal with tailoring the surface and structural properties of nanoporous materials, giving a detailed characterization as well as demonstrating their usefulness for advanced adsorption and catalytic applications.

Porous Materials

Download Porous Materials PDF Online Free

Author :
Publisher : Springer Nature
ISBN 13 : 3030659917
Total Pages : 363 pages
Book Rating : 4.0/5 (36 download)

DOWNLOAD NOW!


Book Synopsis Porous Materials by : Juan Carlos Moreno-Piraján

Download or read book Porous Materials written by Juan Carlos Moreno-Piraján and published by Springer Nature. This book was released on 2021-03-10 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is written in honor of Prof. Francisco Rodriguez-Reinoso, who has made significant contributions in the area of porous materials such as active carbons and graphenes. It details the preparation of porous materials, including carbonaceous, zeolitic, and siliceous materials, MOFs, aerogels, and xerogels, describing the characterization techniques and the interpretation of the results, and highlighting common errors that can occur during the process. This book subsequently presents the use of modeling based on thermodynamics to describe the materials. Lastly, it illustrates a number of current environmental protection applications in the context of both water and air.

Metal Nanoparticles

Download Metal Nanoparticles PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 9780585404394
Total Pages : 348 pages
Book Rating : 4.4/5 (43 download)

DOWNLOAD NOW!


Book Synopsis Metal Nanoparticles by : Daniel L. Fedlheim

Download or read book Metal Nanoparticles written by Daniel L. Fedlheim and published by CRC Press. This book was released on 2001-10-26 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: A state-of-the-art reference, Metal Nanoparticles offers the latest research on the synthesis, characterization, and applications of nanoparticles. Following an introduction of structural, optical, electronic, and electrochemical properties of nanoparticles, the book elaborates on nanoclusters, hyper-Raleigh scattering, nanoarrays, and several applications including single electron devices, chemical sensors, biomolecule sensors, and DNA detection. The text emphasizes how size, shape, and surface chemistry affect particle performance throughout. Topics include synthesis and formation of nanoclusters, nanosphere lithography, modeling of nanoparticle optical properties, and biomolecule sensors.

Nanoporous Materials: Science And Engineering

Download Nanoporous Materials: Science And Engineering PDF Online Free

Author :
Publisher : World Scientific
ISBN 13 : 178326179X
Total Pages : 911 pages
Book Rating : 4.7/5 (832 download)

DOWNLOAD NOW!


Book Synopsis Nanoporous Materials: Science And Engineering by : G Q Max Lu

Download or read book Nanoporous Materials: Science And Engineering written by G Q Max Lu and published by World Scientific. This book was released on 2004-11-22 with total page 911 pages. Available in PDF, EPUB and Kindle. Book excerpt: Porous materials are of scientific and technological importance because of the presence of voids of controllable dimensions at the atomic, molecular, and nanometer scales, enabling them to discriminate and interact with molecules and clusters. Interestingly the big deal about this class of materials is about the “nothingness” within — the pore space. International Union of Pure and Applied Chemistry (IUPAC) classifies porous materials into three categories — micropores of less than 2 nm in diameter, mesopores between 2 and 50 nm, and macropores of greater than 50 nm. In this book, nanoporous materials are defined as those porous materials with pore diameters less than 100 nm.Over the last decade, there has been an ever increasing interest and research effort in the synthesis, characterization, functionalization, molecular modeling and design of nanoporous materials. The main challenges in research include the fundamental understanding of structure-property relations and tailor-design of nanostructures for specific properties and applications. Research efforts in this field have been driven by the rapid growing emerging applications such as biosensor, drug delivery, gas separation, energy storage and fuel cell technology, nanocatalysis and photonics. These applications offer exciting new opportunities for scientists to develop new strategies and techniques for the synthesis and applications of these materials.This book provides a series of systematic reviews of the recent developments in nanoporous materials. It covers the following topics: (1) synthesis, processing, characterization and property evaluation; (2) functionalization by physical and/or chemical treatments; (3) experimental and computational studies on fundamental properties, such as catalytic effects, transport and adsorption, molecular sieving and biosorption; (4) applications, including photonic devices, catalysis, environmental pollution control, biological molecules separation and isolation, sensors, membranes, hydrogen and energy storage, etc./a

Introduction to Porous Materials

Download Introduction to Porous Materials PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 111942660X
Total Pages : 441 pages
Book Rating : 4.1/5 (194 download)

DOWNLOAD NOW!


Book Synopsis Introduction to Porous Materials by : Pascal Van Der Voort

Download or read book Introduction to Porous Materials written by Pascal Van Der Voort and published by John Wiley & Sons. This book was released on 2019-08-19 with total page 441 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive textbook on the timely and rapidly developing topic of inorganic porous materials This is the first textbook to completely cover a broad range of inorganic porous materials. It introduces the reader to the development of functional porous inorganic materials, from the synthetic zeolites in the 50’s, to today’s hybrid materials such as metal-organic frameworks (MOFs), covalent organic frameworks (COFs) and related networks. It also provides the necessary background to understand how porous materials are organized, characterized, and applied in adsorption, catalysis, and many other domains. Additionally, the book explains characterization and application from the materials scientist viewpoint, giving the reader a practical approach on the characterization and application of the respective materials. Introduction to Inorganic Porous Materials begins by describing the basic concepts of porosity and the different types of pores, surfaces, and amorphous versus crystalline materials, before introducing readers to nature’s porous materials. It then goes on to cover everything from adsorption and catalysis to amorphous materials such as silica to inorganic carbons and Periodic Mesoporous Organosilicas (PMOs). It discusses the synthesis and applications of MOFs and the broad family of COFs. It concludes with a look at future prospects and emerging trends in the field. The only complete book of its kind to cover the wide variety of inorganic and hybrid porous materials A comprehensive reference and outstanding tool for any course on inorganic porous materials, heterogeneous catalysis, and adsorption Gives students and investigators the opportunity to learn about porous materials, how to characterize them, and understand how they can be applied in different fields Introduction to Inorganic Porous Materials is an excellent book for students and professionals of inorganic chemistry and materials science with an interest in porous materials, functional inorganic materials, heterogeneous catalysis and adsorption, and solid state characterization techniques.

Engineered Nanoparticles and the Environment

Download Engineered Nanoparticles and the Environment PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 1119275830
Total Pages : 510 pages
Book Rating : 4.1/5 (192 download)

DOWNLOAD NOW!


Book Synopsis Engineered Nanoparticles and the Environment by : Baoshan Xing

Download or read book Engineered Nanoparticles and the Environment written by Baoshan Xing and published by John Wiley & Sons. This book was released on 2016-08-29 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details the source, release, exposure, adsorption, aggregation, bioavailability, transport, transformation, and modeling of engineered nanoparticles found in many common products and applications Covers synthesis, environmental application, detection, and characterization of engineered nanoparticles Details the toxicity and risk assessment of engineered nanoparticles Includes topics on the transport, transformation, and modeling of engineered nanoparticles Presents the latest developments and knowledge of engineered nanoparticles Written by world leading experts from prestigious universities and companies

Environmental Surfaces and Interfaces from the Nanoscale to the Global Scale

Download Environmental Surfaces and Interfaces from the Nanoscale to the Global Scale PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 0470400366
Total Pages : 469 pages
Book Rating : 4.4/5 (74 download)

DOWNLOAD NOW!


Book Synopsis Environmental Surfaces and Interfaces from the Nanoscale to the Global Scale by : Patricia Maurice

Download or read book Environmental Surfaces and Interfaces from the Nanoscale to the Global Scale written by Patricia Maurice and published by John Wiley & Sons. This book was released on 2009-06-15 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: An advanced exploration ofwater-rock interactions Based on the author's fifteen years of teaching and tried-and-tested experiences in the classroom, here is a comprehensive exploration of water-rock interactions. Environmental Surfaces and Interfaces from the Nanoscale to the Global Scale covers aspects ranging from the theory of charged particle surfaces to how minerals grow and dissolve to new frontiers in W-R interactions such as nanoparticles, geomicrobiology, and climate change. Providing basic conceptual understanding along with more complex subject matter, Professor Patricia Maurice encourages students to look beyond the text to ongoing research in the field. Designed to engage the learner, the book features: Numerous case studies to contextualize concepts Practice and thought questions at the end of each chapter Broad coverage from basic theory to cutting-edge topics such as nanotechnology Both basic and applied science This text goes beyond W-R interactions to touch on a broad range of environmental disciplines. While written for advanced undergraduate and graduate students primarily in geochemistry and soil chemistry, Environmental Surfaces and Interfaces from the Nanoscale to the Global Scale will serve the needs of such diverse fields as environmental engineering, hydrogeology, physics, biology, and environmental chemistry.

Metal Oxide Nanoparticles, 2 Volume Set

Download Metal Oxide Nanoparticles, 2 Volume Set PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 1119436745
Total Pages : 903 pages
Book Rating : 4.1/5 (194 download)

DOWNLOAD NOW!


Book Synopsis Metal Oxide Nanoparticles, 2 Volume Set by : Oliver Diwald

Download or read book Metal Oxide Nanoparticles, 2 Volume Set written by Oliver Diwald and published by John Wiley & Sons. This book was released on 2021-09-14 with total page 903 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxide Nanoparticles A complete nanoparticle resource for chemists and industry professionals Metal oxide nanoparticles are integral to a wide range of natural and technological processes—from mineral transformation to electronics. Additionally, the fields of engineering, electronics, energy technology, and electronics all utilize metal oxide nanoparticle powders. Metal Oxide Nanoparticles: Formation, Functional Properties, and Interfaces presents readers with the most relevant synthesis and formulation approaches for using metal oxide nanoparticles as functional materials. It covers common processing routes and the assessment of physical and chemical particle properties through comprehensive and complementary characterization methods. This book will serve as an introduction to nanoparticle formulation, their interface chemistry and functional properties at the nanoscale. It will also act as an in-depth resource, sharing detailed information on advanced approaches to the physical, chemical, surface, and interface characterization of metal oxide nanoparticle powders and dispersions. Addresses the application of metal oxide nanoparticles and its economic impact Examines particle synthesis, including the principles of selected bottom-up strategies Explores nanoparticle formulation—a selection of processing and application routes Discusses the significance of particle surfaces and interfaces on structure formation, stability and functional materials properties Covers metal oxide nanoparticle characterization at different length scales With this valuable resource, academic researchers, industrial chemists, and PhD students can all gain insight into the synthesis, properties, and applications of metal oxide nanoparticles.

Carbon Nanomaterials Sourcebook

Download Carbon Nanomaterials Sourcebook PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 1315362449
Total Pages : 735 pages
Book Rating : 4.3/5 (153 download)

DOWNLOAD NOW!


Book Synopsis Carbon Nanomaterials Sourcebook by : Klaus D. Sattler

Download or read book Carbon Nanomaterials Sourcebook written by Klaus D. Sattler and published by CRC Press. This book was released on 2018-09-03 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Carbon Nanomaterials Sourcebook contains extensive, interdisciplinary coverage of carbon nanomaterials, encompassing the full scope of the field—from physics, chemistry, and materials science to molecular biology, engineering, and medicine—in two comprehensive volumes. Written in a tutorial style, this second volume of the sourcebook: Focuses on nanoparticles, nanocapsules, nanofibers, nanoporous structures, and nanocomposites Describes the fundamental properties, growth mechanisms, and processing of each nanomaterial discussed Explores functionalization for electronic, energy, biomedical, and environmental applications Showcases materials with exceptional properties, synthesis methods, large-scale production techniques, and application prospects Provides the tools necessary for understanding current and future technology developments, including important equations, tables, and graphs Each chapter is dedicated to a different type of carbon nanomaterial and addresses three main areas: formation, properties, and applications. This setup allows for quick and easy search, making the Carbon Nanomaterials Sourcebook: Nanoparticles, Nanocapsules, Nanofibers, Nanoporous Structures, and Nanocomposites a must-have reference for scientists and engineers.

Porous Materials

Download Porous Materials PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0124078370
Total Pages : 577 pages
Book Rating : 4.1/5 (24 download)

DOWNLOAD NOW!


Book Synopsis Porous Materials by : Peisheng Liu

Download or read book Porous Materials written by Peisheng Liu and published by Elsevier. This book was released on 2014-08-12 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineers and scientists alike will find this book to be an excellent introduction to the topic of porous materials, in particular the three main groups of porous materials: porous metals, porous ceramics, and polymer foams. Beginning with a general introduction to porous materials, the next six chapters focus on the processing and applications of each of the three main materials groups. The book includes such new processes as gel-casting and freeze-drying for porous ceramics and self-propagating high temperature synthesis (SHS) for porous metals. The applications discussed are relevant to a wide number of fields and industries, including aerospace, energy, transportation, construction, electronics, biomedical and others. The book concludes with a chapter on characterization methods for some basic parameters of porous materials. Porous Materials: Processing and Applications is an excellent resource for academic and industrial researchers in porous materials, as well as for upper-level undergraduate and graduate students in materials science and engineering, physics, chemistry, mechanics, metallurgy, and related specialties. - A comprehensive overview of processing and applications of porous materials – provides younger researchers, engineers and students with the best introduction to this class of materials - Includes three full chapters on modern applications - one for each of the three main groups of porous materials - Introduces readers to several characterization methods for porous materials, including methods for characterizing pore size, thermal conductivity, electrical resistivity and specific surface area

Surface Modification of Nanoparticle and Natural Fiber Fillers

Download Surface Modification of Nanoparticle and Natural Fiber Fillers PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 3527670289
Total Pages : 243 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!


Book Synopsis Surface Modification of Nanoparticle and Natural Fiber Fillers by : Vikas Mittal

Download or read book Surface Modification of Nanoparticle and Natural Fiber Fillers written by Vikas Mittal and published by John Wiley & Sons. This book was released on 2015-07-06 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of the various methodologies for the surface treatment of different types of inorganic spherical and fibrous fillers, describing ball milling, cationic polymerization, vapor phase grafting, plasma treatment and UV irradiation in detail. In addition, the book connects the resulting composite properties to the modified filler surface properties, thus allowing for a purposeful, application-oriented composite design.

Carbon Nanomaterial-Based Adsorbents for Water Purification

Download Carbon Nanomaterial-Based Adsorbents for Water Purification PDF Online Free

Author :
Publisher : Elsevier
ISBN 13 : 0128219602
Total Pages : 422 pages
Book Rating : 4.1/5 (282 download)

DOWNLOAD NOW!


Book Synopsis Carbon Nanomaterial-Based Adsorbents for Water Purification by : Suprakas Sinha Ray

Download or read book Carbon Nanomaterial-Based Adsorbents for Water Purification written by Suprakas Sinha Ray and published by Elsevier. This book was released on 2020-06-27 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The deterioration of water quality and unavailability of drinkable water are pressing challenges worldwide. The removal of toxic organic and inorganic pollutants from water is vital for a clean environment, as a response to water scarcity. Adsorption-based water technologies are among the most widely used because of their high efficiency and low cost, without relying on a complex infrastructure. In recent years, carbon nanomaterials (CNMs), such as graphene and derivatives, carbon nanotubes, carbon nanofibers, nanoporous carbon, fullerenes, graphitic carbon nitride, and nanodiamonds have been extensively exploited as adsorbents due to their extraordinary surface properties, ease of modification, large surface area, controlled structural varieties, high chemical stability, porosity, low density, ease of regeneration, and reusability. This book provides a thorough overview of the state of the art in carbon nanomaterials as they are used for adsorption applications in water purifications, as well as addressing their toxicological challenges. This volume primarily explores the fundamentals of adsorption, its mechanical aspects, synthesis and properties of CNMs, and adsorption performances of CNMs and their nanocomposites with organic and inorganic materials. Structural engineering and activation processes produce materials with enhanced adsorptive properties and separation efficiencies. Furthermore, the formation of CNMs with 2D and 3D macro-and microstructures and high porosities is a potential approach to improve adsorption performances and extend CNM use at the industrial level. The book also addresses important issues regarding these adsorbents that potentially affect future research and industrial applications of carbon-based nanoadsorbents in water security. - Presents advances in multifunctional 3D superstructures of carbon nanomaterials and their composites for adsorption applications - Outlines the fundamentals on synthesis and characterization techniques of carbon-based nanostructures and their composites - Assesses the major toxicological challenges in using nanostructured materials as adsorbents for water purification

Self-Cleaning Materials and Surfaces

Download Self-Cleaning Materials and Surfaces PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 1118652363
Total Pages : 513 pages
Book Rating : 4.1/5 (186 download)

DOWNLOAD NOW!


Book Synopsis Self-Cleaning Materials and Surfaces by : Walid A. Daoud

Download or read book Self-Cleaning Materials and Surfaces written by Walid A. Daoud and published by John Wiley & Sons. This book was released on 2013-07-12 with total page 513 pages. Available in PDF, EPUB and Kindle. Book excerpt: With increasing demand for hygienic, self-disinfecting and contamination free surfaces, interest in developing self-cleaning protective materials and surfaces has grown rapidly in recent times. This new title comprises of invited chapters from renowned researchers in the area of self-cleaning nano-coatings and the result is a comprehensive review of current research on both hydrophobic and hydrophilic (photocatalytic effect) self-cleaning materials.

Ordered Mesoporous Materials

Download Ordered Mesoporous Materials PDF Online Free

Author :
Publisher : John Wiley & Sons
ISBN 13 : 3527647899
Total Pages : 544 pages
Book Rating : 4.5/5 (276 download)

DOWNLOAD NOW!


Book Synopsis Ordered Mesoporous Materials by : Dongyuan Zhao

Download or read book Ordered Mesoporous Materials written by Dongyuan Zhao and published by John Wiley & Sons. This book was released on 2012-11-28 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mesoporous materials are a class of molecules with a large and uniform pore size, highly regular nanopores, and a large surface area. This book is devoted to all aspects and types of these materials and describes, in an in-depth and systematic manner, the step-by-step synthesis and its mechanism, as well as the characterization, morphology control, hybridization, and applications, of mesoporous molecular sieves. In so doing, it covers silicates, metal-doped silicates, nonsilicates, and organic-inorganic hybrids. Although the emphasis is on synthesis, the expert authors also discuss characterization and applications, ranging from catalysis and biochemistry to optics and the use of these materials as templates for nanomaterial synthesis. Both the fundamentals and the latest research results are covered, ensuring that this monograph serves as a reference for researchers in and newcomers to the field.

Colloidal Silica

Download Colloidal Silica PDF Online Free

Author :
Publisher : CRC Press
ISBN 13 : 1420028707
Total Pages : 926 pages
Book Rating : 4.4/5 (2 download)

DOWNLOAD NOW!


Book Synopsis Colloidal Silica by : Horacio E. Bergna

Download or read book Colloidal Silica written by Horacio E. Bergna and published by CRC Press. This book was released on 2005-12-19 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: In spite of the apparent simplicity of silica's composition and structure, scientists are still investigating fundamental questions regarding the formation, constitution, and behavior of colloidal silica systems. Colloidal Silica: Fundamentals and Applications introduces new information on colloid science related to silica chemistry as well

Emerging Applications of Nanoparticles and Architectural Nanostructures

Download Emerging Applications of Nanoparticles and Architectural Nanostructures PDF Online Free

Author :
Publisher : William Andrew
ISBN 13 : 0128135166
Total Pages : 650 pages
Book Rating : 4.1/5 (281 download)

DOWNLOAD NOW!


Book Synopsis Emerging Applications of Nanoparticles and Architectural Nanostructures by : Abdel Salam Hamdy Makhlouf

Download or read book Emerging Applications of Nanoparticles and Architectural Nanostructures written by Abdel Salam Hamdy Makhlouf and published by William Andrew. This book was released on 2018-03-22 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emerging Applications of Nanoparticles and Architecture Nanostructures: Current Prospects and Future Trends discusses the most important current applications of nanoparticles and architecture nanostructures in a comprehensive, detailed manner. The book covers major applications of nanoparticles and architecture nanostructures, taking into account their unusual shapes and high surface areas. In particular, coverage is given to applications in aerospace, automotive, batteries, sensors, smart textile design, energy conversion, color imaging, printing, computer chips, medical implants, pharmacy, cosmetics, and more. In addition, the book discusses the future of research in these areas. This is a valuable reference for both materials scientists, chemical and mechanical engineers working both in R&D and academia who want to learn more on how nanoparticles and nanomaterials are commercially applied. - Provides an in-depth look at the properties of nanoparticles and architecture nanostructures in terms of their applicability for industrial uses - Analyzes the most recent advances and industrial applications of different types of nanoparticles and architecture nanostructures, taking into account their unusual structures and compositions - Identifies novel nanometric particles and architectures that are of particular value for applications and the techniques required to use them effectively