electronics

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© 2007 by Taylor & Francis Group, LLC

NANO

and

MOLECULAR

ELECTRONICS

Handbook

Nano- and Microscience, Engineering,

Technology, and Medicine Series

Series Editor

Sergey Edward Lyshevski

Titles in the Series

Logic Design of NanoICS

Svetlana Yanushkevich

MEMS and NEMS:

Systems, Devices, and Structures

Sergey Edward Lyshevski

Microelectrofluidic Systems: Modeling and Simulation

Tianhao Zhang, Krishnendu Chakrabarty, and Richard B. Fair

Micro Mechatronics: Modeling, Analysis, and Design with M ATLAB

®

Victor Giurgiutiu and Sergey Edward Lyshevski

Microdrop Generation

Eric R. Lee

Nano- and Micro-Electromechanical Systems: Fundamentals of Nano- and Microengineering

Sergey Edward Lyshevski

Nano and Molecular Electronics Handbook

Sergey Edward Lyshevski

Nanoelectromechanics in Engineering and Biology

Michael Pycraft Hughes

© 2007 by Taylor & Francis Group, LLC

NANO and

MOLECULAR

ELECTRONICS

Edited by

Sergey Edward Lyshevski

© 2007 by Taylor & Francis Group, LLC

CRC Press

Taylor & Francis Group

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© 2007 by Taylor & Francis Group, LLC

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No claim to original U.S. Government works

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Library of Congress Cataloging-in-Publication Data

Nano and molecular electronics handbook / editor, Sergey E. Lyshevski.

p. cm. -- (Nano- and microscience, engineering, technology, and medicine series)

Includes bibliographical references and index.

ISBN-13: 978-0-8493-8528-5 (alk. paper)

ISBN-10: 0-8493-8528-8 (alk. paper)

1. Molecular electronics--Handbooks, manuals, etc. I. Lyshevski, Sergey Edward. II. Title. III. Series.

TK7874.8.N358 2007

621.381--dc22 2006101011

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© 2007 by Taylor & Francis Group, LLC

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The Editor

Sergey Edward Lyshevski was born in Kiev, Ukraine. He received his M.S. (1980) and Ph.D. (1987) degrees from Kiev Polytechnic Institute, both in electrical engineering. From 1980 to 1993, Dr. Lyshevski held faculty positions at the Department of Electrical Engineering at Kiev Polytechnic Institute and the Academy of Sciences of Ukraine. From 1989 to 1993, he was the Microelectronic and Electromechanical Systems

Division Head at the Academy of Sciences of Ukraine. From 1993 to 2002, he was with Purdue School of

Engineering as an associate professor of electrical and computer engineering. In 2002, Dr. Lyshevski joined

Rochester Institute of Technology as a professor of electrical engineering. Dr. Lyshevski serves as a Full

Professor Faculty Fellow at the U.S. Air Force Research Laboratories and Naval Warfare Centers. He is the author of ten books (including Logic Design of NanoICs, coauthored with S. Yanushkevich and V. Shmerko,

CRC Press, 2005; Nano- and Microelectromechanical Systems: Fundamentals of Micro- and Nanoengineering,

CRC Press, 2004; MEMS and NEMS: Systems, Devices, and Structures, CRC Press, 2002) and is the author or coauthor of more than 300 journal articles, handbook chapters, and regular conference papers. His current research activities are focused on molecular electronics, molecular processing platforms, nanoengineering, cognitive systems, novel organizations/architectures, new nanoelectronic devices, reconfigurable superhigh-performance computing, and systems informatics. Dr. Lyshevski has made significant contributions in the synthesis, design, application, verification, and implementation of advanced aerospace, electronic, electromechanical, and naval systems. He has made more than 30 invited presentations (nationally and internationally) and serves as an editor of the Taylor & Francis book series Nano- and Microscience,

Engineering, Technology, and Medicine.

vii

© 2007 by Taylor & Francis Group, LLC

Contributors

Rajeev Ahuja

Condensed Matter Theory

Group

Department of Physics

Uppsala University

Uppsala, Sweden

Richard Akis

Center for Solid State

Engineering Research

Arizona State University

Tempe, Arizona, USA

Andrea Alessandrini

CNR-INFM-S3

NanoStructures and

BioSystems at Surfaces

Modena, Italy

Supriyo Bandyopadhyay

Department of Electrical and

Computer Engineering

Virginia Commonwealth

University

Richmond, Virginia, USA

Valeriu Beiu

United Arab Emirates

University

Al-Ain, United Arab Emirates

Robert R. Birge

Department of Chemistry

University of Connecticut

Storrs, Connecticut, USA

A.M. Bratkovsky

Hewlett-Packard Laboratories

Palo Alto, California, USA

J.A. Brown

Department of Physics

University of Alberta

Edmonton, Canada

K. Burke

Department of Chemistry

University of California

Irvine, California, USA

Horacio F. Cantiello

Massachusetts General Hospital and

Harvard Medical School

Charlestown, Massachusetts,

USA

Aldo Di Carlo

Universit`a di Roma

Tor Vergata

Roma, Italy

G.F. Cerofolini

STMicroelectronics

Post-Silicon Technology

Milan, Italy

J. Cuevas

Grupo de F´ısica No Lineal

Departamento de F´ısica

Aplicada I

ETSI Inform Universidad de Sevilla

Sevilla, Spain

Shamik Das

Nanosystems Group

The MITRE Corporation

McLean, Virginia, USA

John M. Dixon

Massachusetts General Hospital and

Harvard Medical School

Charlestown, Massachusetts,

USA

J. Dorignac

College of Engineering

Boston University

Boston, Massachusetts, USA

Rodney Douglas

Institute of Neuroinformatics

Zurich, Switzerland

J.C. Eilbeck

Department of Mathematics

Heriot-Watt University

Riccarton, Edinburgh, UK

James C. Ellenbogen

Nanosystems Group

The MITRE Corporation

McLean, Virginia, USA

Christoph Erlen

Technische Universit¨at

M¨unchen

M¨unchen, Germany

F. Evers

Institut f ˙ur Theorie der

Kondensierten Materie

Universit¨at Karlsruhe

Karlsruhe, Germany ix

© 2007 by Taylor & Francis Group, LLC

Paolo Facci

CNR-INFM-S3

NanoStructures and

BioSystems at Surfaces

Modena, Italy

David K. Ferry

Center for Solid State

Engineering Research

Arizona State University

Tempe, Arizona, USA

Danko D. Georgiev

Laboratory of Molecular

Pharmacology

Faculty of Pharmaceutical

Sciences

Kanazawa University Graduate

School of Natural Science and Technology

Kakuma-machi Kanazawa

Ishikawa, Japan

James F. Glazebrook

Department of Mathematics and Computer Science

Eastern Illinois University

Charleston, Illinois, USA

Anton Grigoriev

Condensed Matter Theory

Group

Department of Physics

Uppsala University

Uppsala, Sweden

Rikizo Hatakeyama

Department of Electronic

Engineering

Tohoku University

Sendai/Japan

Thorsten Hansen

Department of Chemistry and

International Institute for

Nanotechnology

Northwestern University

Argonne, Evanston,

Illinois, USA x

© 2007 by Taylor & Francis Group, LLC

Jason R. Hillebrecht

Department of Molecular and

Cell Biology

University of Connecticut

Storrs, Connecticut, USA

Walid Ibrahim

United Arab Emirates

University

Al-Ain, United Arab Emirates

Giacomo Indiveri

Institute of Neuroinformatics

Zurich, Switzerland

Dustin K. James

Department of Chemistry

Rice University

Houston, Texas, USA

Bhargava Kanchibotla

Department of Electrical and

Computer Engineering

Virginia Commonwealth

University

Richmond, Virginia, USA

Jeremy F. Koscielecki

Department of Chemistry

University of Connecticut

Storrs, Connecticut, USA

Mark P. Krebs

Department of Ophthalmology

College of Medicine

University of Florida

Gainesville, Florida, USA

Craig S. Lent

Department of Electrical

Engineering

University of Notre Dame

Notre Dame, Indiana, USA

Takhee Lee

Department of Materials

Science and Engineering

Gwangju Institute of Science and Technology

Gwangju, Korea

Paolo Lugli

Technische Universit¨at M¨unchen

M¨unchen, Germany

Sergey Edward Lyshevski

Department of Electrical

Engineering

Rochester Institute of

Technology

Rochester, New York, USA

Lyuba Malysheva

Bogolyubov Institute for

Theoretical Physics

Kiev, Ukraine

Thomas Marsh

University of St. Thomas

St. Paul, Minnesota, USA

Duane L. Marcy

Department of Electrical

Engineering and Computer

Science

Syracuse University

Syracuse, New York, USA

Robert M. Metzger

Laboratory for Molecular

Electronics

Department of Chemistry

University of Alabama

Tuscaloosa, Alabama, USA

M. Meyyappan

Center for Nanotechnology

NASA Ames Research Center

Moffett Field, California, USA

Lev G. Mourokh

Physics Department

Queens College of the City

University of New York

Flushing, New York, USA

Vladimiro Mujica

Department of Chemistry and

International Institute for

Nanotechnology

Northwestern University

Evanston, Illinois, USA and

Argonne National Laboratory

Center for Nanoscale

Materials

Argonne, Illinois, USA

Alexander Onipko

IFM

Linkping University

Linkping, Sweden

Alexei O. Orlov

Department of Electrical

Engineering

University of Notre Dame

Notre Dame, Indiana, USA

F. Palmero

Grupo de F´ısica No Lineal

Departamento de F´ısica

ETSI Inform Universidad de Sevilla

Sevilla, Spain

Alessandro Pecchia

Universit`a di Roma

Tor Vergata

Roma, Italy

Carl A. Picconatto

Nanosystems Group

The MITRE Corporation

McLean, Virginia, USA

Sandipan Pramanik

Department of Electrical and

Computer Engineering

Virginia Commonwealth

University

Richmond, Virginia, USA

Avner Priel

Department of Physics

University of Alberta

Edmonton, Alberta, Canada

Mark A. Ratner

Department of Chemistry and

International Institute for

Nanotechnology

Northwestern University

Evanston, Illinois, USA

Mark A. Reed

Departments of Electrical

Engineering, Applied

Physics, and Physics

Yale University

New Haven, Connecticut, USA

R.A. R¨omer

Department of Physics and

Centre for Scientific

Computing

University of Warwick

Coventry, UK

F.R. Romero

Grupo de F´ısica No Lineal

Departamento de FAMN

Facultad de F´ısica

Universidad de Sevilla

Sevilla, Spain

Garrett S. Rose

Department of Electrical and Computer Engineering

Polytechnic University

Brooklyn, New York, USA

Anatoly Yu. Smirnov

Quantum Cat Analytics Inc.

Brooklyn, New York, USA

Gregory L. Snider

Department of Electrical

Engineering

University of Notre Dame

Notre Dame, Indiana, USA

Gil Speyer

Center for Solid State

Engineering Research

Arizona State University

Tempe, Arizona, USA

Jeffrey A. Stuart

Department of Chemistry

University of Connecticut

Storrs, Connecticut, USA

William Tetley

Department of Electrical

Engineering and Computer

Science

Syracuse University

Syracuse, New York, USA

James M. Tour

Department of Chemistry

Rice University

Houston, Texas, USA

Jack A. Tuszynski

Department of Physics

University of Alberta

Edmonton, Alberta, Canada

James Vesenka

University of New England

Biddeford, Maine, USA

Wenyong Wang

Semiconductor Electronics

Division

National Institute of Standards and Technology

Gaithersburg, Maryland, USA

Bangwei Xi

Department of Chemistry

Syracuse University

Syracuse, New York, USA

Bin Yu

Center for Nanotechnology

NASA Ames Research Center

Moffett Field, California, USA

Matthew M. Ziegler

IBM T. J. Watson Research

Center

Yorktown Heights, New York,

USA xi

© 2007 by Taylor & Francis Group, LLC

Contents

Section I Molecular and Nano Electronics: Device- and

System-Level

1

Electrical Characterization of Self-Assembled Monolayers

Wenyong Wang, Takhee Lee, and Mark A. Reed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

2

Molecular Electronic Computing Architectures

James M. Tour and Dustin K. James . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

3

Unimolecular Electronics: Results and Prospects

Robert M. Metzger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

4

Carbon Derivatives

Rikizo Hatakeyama . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

5

System-Level Design and Simulation of Nanomemories and Nanoprocessors

Shamik Das, Carl A. Picconatto, Garrett S. Rose, Matthew M. Ziegler, and James C. Ellenbogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

6

Three-Dimensional Molecular Electronics and Integrated Circuits for Signal and Information Processing Platforms

Sergey Edward Lyshevski . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Section II Nanoscaled Electronics

7

Inorganic Nanowires in Electronics

Bin Yu and M. Meyyappan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

8

Quantum Dots in Nanoelectronic Devices

Gregory L. Snider, Alexei O. Orlov, and Craig S. Lent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

9

Self Assembly of Nanostructures Using Nanoporous Alumina Templates

Bhargava Kanchibotla, Sandipan Pramanik, and Supriyo Bandyopadhyay . . . . . . . . . . . 9-1 xiii

© 2007 by Taylor & Francis Group, LLC

10

Neuromorphic Networks of Spiking Neurons

Giacomo Indiveri and Rodney Douglas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

11

Allowing Electronics to Face the TSI Era—Molecular Electronics and Beyond

G. F. Cerofolini . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

12

On Computing Nano-Architectures Using Unreliable Nanodevices

Valeriu Beiu and Walid Ibrahim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

Section III Biomolecular Electronics and Processing

13

Properties of “G-Wire” DNA

Thomas Marsh and James Vesenka . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-1

14

Metalloprotein Electronics

Andrea Alessandrini and Paolo Facci . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-1

15

Localization and Transport of Charge by Nonlinearity and Spatial Discreteness in Biomolecules and Semiconductor Nanorings. Aharonov–Bohm Effect for Neutral Excitons

F. Palmero, J. Cuevas, F.R. Romero, J.C. Eilbeck, R.A. R¨omer, and J. Dorignac . . . . . . 15-1

16

Protein-Based Optical Memories

Jeffrey A. Stuart, Robert R. Birge, Mark P. Krebs, Bangwei Xi, William Tetley,

Duane L. Marcy, Jeremy F. Koscielecki, and Jason R. Hillebrecht . . . . . . . . . . . . . . . . . . . . 16-1

17

Subneuronal Processing of Information by Solitary Waves and Stochastic Processes

Danko D. Georgiev and James F. Glazebrook . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-1

18

Electronic and Ionic Conductivities of Microtubules and Actin Filaments,

Their Consequences for Cell Signaling and Applications to Bioelectronics

Jack A. Tuszynski, Avner Priel, J.A. Brown, Horacio F. Cantiello, and John M. Dixon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-1

Section IV Molecular and Nano Electronics: Device-Level

Modeling and Simulation

xiv

19

Simulation Tools in Molecular Electronics

Christoph Erlen, Paolo Lugli, Alessandro Pecchia, and Aldo Di Carlo . . . . . . . . . . . . . . . 19-1

20

Theory of Current Rectification, Switching, and the Role of Defects in Molecular Electronic Devices

A.M. Bratkovsky . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20-1

21

Complexities of the Molecular Conductance Problem

Gil Speyer, Richard Akis, and David K. Ferry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21-1

© 2007 by Taylor & Francis Group, LLC

22

Nanoelectromechanical Oscillator as an Open Quantum System

Lev G. Mourokh and Anatoly Yu. Smirnov . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22-1

23

Coherent Electron Transport in Molecular Contacts: A Case of Tractable Modeling

Alexander Onipko and Lyuba Malysheva . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23-1

24

Pride, Prejudice, and Penury of ab initio Transport Calculations for Single Molecules

F. Evers and K. Burke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-1

25

Molecular Electronics Devices

Anton Grigoriev and Rajeev Ahuja . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-1

26

An Electronic Cotunneling Model of STM-Induced Unimolecular

Surface Reactions

Vladimiro Mujica, Thorsten Hansen, and Mark A. Ratner . . . . . . . . . . . . . . . . . . . . . . . . . . 26-1

© 2007 by Taylor & Francis Group, LLC xv

Preface

It was a great pleasure to edit this handbook, which consists of outstanding chapters written by acclaimed experts in their field. The overall objective was to provide coherent coverage of a broad spectrum of issues in molecular and nanoelectronics (e.g., covering fundamentals, reporting recent innovations, devising novel solutions, reporting possible technologies, foreseeing far-reaching developments, envisioning new paradigms, etc.). Molecular and nanoelectronics is a revolutionary theory- and technology-in-progress paradigm. The handbook’s chapters document sound fundamentals and feasible technologies, ensuring a balanced coverage and practicality. There should be no end to molecular electronics and molecular processing platforms ( M PPs), which ensure superior overall performance and functionality that cannot be achieved by any envisioned microelectronics innovations.

Due to inadequate commitments to high-risk/extremely-high-pay-off developments, limited knowledge, and the abrupt nature of fundamental discoveries and enabling technologies, it is difficult to accurately predict when various discoveries will mature in the commercial product arena. For more than six decades, large-scale focused efforts have concentrated on solid-state microelectronics. A matured $150-billion microelectronics industry has profoundly contributed to technological progress and societal welfare. However, further progress and envisioned microelectronics evolutions encounter significant fundamental and technological challenges and limits. Those limits may not be overcome. In attempts to find new solutions and define novel inroads, innovative paradigms and technologies have been devised and examined. Molecular and nanoelectronics have emerged as one of the most promising solutions.

The difference between molecular- (nano) and micro-electronics is not the size (dimensionality), but the profoundly different device- and system-level solutions, the device physics, and the phenomena, fabrication, and topologies/organizations/architectures. For example, a field-effect transistor with an insulator thickness less than 1 nm and a channel length less than 20 nm cannot be declared a nanoelectronic device even though it has the subnanometer insulator thickness and may utilize a carbon nanotube (with a diameter under

1 nm) to form a channel. Three-dimensional topology molecular and nanoelectronic devices, engineered from atomic aggregates and synthesized utilizing bottom-up fabrication, exhibit quantum phenomena and electrochemomechanical effects that should be uniquely utilized. The topology, organization, and architecture of three-dimensional molecular integrated circuits ( M ICs) and M PPs are entirely different compared with conventional two-dimensional ICs.

Questions regarding the feasibility of molecular electronics and of the overall feasibility of solid

M PPs arise. No conclusive evidence exists

M ICs and there was no analog for solid-state microelectronics and ICs existed in the past. In contrast, an enormous variety of biomolecular processing platforms are visible in nature. These platforms provide one with undeniable evidence of feasibility, soundness, and unprecedented supremacy of a molecular paradigm. Though there have been attempts to utilize and prototype biocentered electronics, processing, and memories, these efforts have faced—and still face—enormous fundamental, experimental, and technological challenges. Superior organizations and architectures of M ICs and M PPs can be devised utilizing biomimetics, thus examining and prototyping brain and central nervous system functions. Today, many unsolved problems plague biosystems—from the baseline functionality of neurons to the capabilities of neuronal aggregates, from information processing to information measures, from the phenomena utilized xvii

© 2007 by Taylor & Francis Group, LLC

to the cellular mechanisms exhibited, and so on. Even though significant challenges still exist, rapid progress and new discoveries have been made in recent years on both fundamental and technological forefronts. This progress and some of its major findings are covered in this handbook. The handbook consists of four sections, providing coherence in its subject matter. The six chapters of Section I: Molecular and Nano Electronics: Device-

and System-Level are as follows: r

Electrical Characterization of Self-Assembled Monolayers r

Molecular Electronic Computing Architectures r

Unimolecular Electronics: Results and Prospects r

Carbon Derivatives r

System-Level Design and Simulation of Nanomemories and Nanoprocessors r

Three-Dimensional Molecular Electronics and Integrated Circuits for Signal and Information

Processing Platforms

These chapters report the device physics of molecular devices ( the design of M ICs, and devising

M devices), the synthesis of those M devices,

M PPs. Meaningful results on device- and system-level fundamentals are offered, and envisioned technologies and engineering practices are documented.

Section II: Nanoscaled Electronics consists of the following six chapters: r

Inorganic Nanowires in Electronics r

Quantum Dots in Nanoelectronic Devices r

Self Assembly of Nanostructures Using Nanoporous Alumina Templates r

Neuromorphic Networks of Spiking Neurons r

Allowing Electronics to Face the TSI Era—Molecular Electronics and Beyond r

On Computing Nano-Architectures using unreliable Nanodevices or on Yield-Energy-Delay Logic

Designs

These chapters focus on nano- and nanoscaled electronics. Various practical solutions are reported.

Section III: Biomolecular Electronics and Processing covers recent innovative results in biomolecular electronics and memories. The six chapters included are r

Properties of “G-Wire” DNA r

Metalloprotein Electronics r

Localization and Transport of Charge by Nonlinearity and Spatial Discreteness in Biomolecules and Semiconductor Nanorings. Aharonov–Bohm Effect for Neutral Excitons r

Protein-Based Optical Memories r

Subneuronal Processing of Information by Solitary Waves and Stochastic Processes r

Electronic and Ionic Conductivities of Microtubules and Actin Filaments, Their Consequences for

Cell Signaling and Applications to Bioelectronics

Each chapter is of practical importance regarding the envisioned biomolecular platforms, and will help in comprehending significant phenomena in biosystems.

The eight chapters of Section IV: Molecular and Nano Electronics: Device-Level Modeling and Simulation focus on various aspects of high-fidelity modeling, heterogeneous simulations, and data-intensive analysis.

The chapters included consist of the following: xviii

© 2007 by Taylor & Francis Group, LLC

r

Simulation Tools in Molecular Electronics r

Theory of Current Rectification, Switching, and the Role of Defects in Molecular Electronic Devices r

Complexities of the Molecular Conductance Problem r

Nanoelectromechanical Oscillator as an Open Quantum System r

Coherent Electron Transport in Molecular Contacts: A Case of Tractable Modeling r

Pride, Prejudice, and Penury of ab initio Transport Calculations for Single Molecules r

Molecular Electronics Devices r

An Electric Cotunneling Model of STM-Induced Unimolecular Surface Reactions

These chapters provide the reader with valuable results that can be utilized in various applications, with a major emphasis on the device-level fundamentals.

The handbook’s chapters report the individual authors’ results. Therefore, in reading different chapters, the reader may observe some variations and inconsistencies in style, definitions, formulations, findings, and vision. This, in my opinion, is not a weakness but rather a strength. In fact, the reader should be aware of the differences in opinions, the distinct methods applied, the alternative technologies pursued, and the various concepts emphasized. I truly enjoyed collaborating with all the authors and appreciate their valuable contribution. It should be evident that the views, findings, recommendations, and conclusions documented in the handbook’s chapters are those of the authors’, and do not necessarily reflect the editor’s opinion. However, all the chapters in the book emphasize the need for further research and development in molecular and nanoelectronics, which is today’s engineering, science, and technology frontier.

It should be emphasized that no matter how many times the material has been reviewed, and effort spent to guarantee the highest quality, there is no guarantee this handbook is free from minor errors, and shortcomings.

If you find something you feel needs correcting, adjustment, clarification, and/or modification, please notify me. Your help and assistance are greatly appreciated and deeply acknowledged.

Acknowledgments

Many people contributed to this book. First, I would like to express my sincere thanks and gratitude to all the book’s contributors. It is with great pleasure that I acknowledge the help I received from many people in preparing this handbook. The outstanding Taylor & Francis team, especially Nora Konopka (Acquisitions

Editor, Electrical Engineering), Jessica Vakili, and Amy Rodriguez (Project Editor), helped tremendously, and assisted me by offering much valuable and deeply treasured feedback. Many thanks to all of you.

Sergey Edward Lyshevski

Department of Electrical Engineering

Rochester Institute of Technology

Rochester, NY, 14623-5603, USA

E-mail: Sergey.Lyshevski@rit.edu

Web cite: www.rit.edu/

∼ seleee xix

© 2007 by Taylor & Francis Group, LLC

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