7 EXPERIMENTAL INVESTIGATION AND MODELING OF GAS-SENSING EFFECT IN MIXED METAL OXIDE NANOCOMPOSITES&L.I.Trakhtenberg G.N.Gerasimov V.F.Gromov M.A.Kozhushner O.J.Лegbusi

1 Introduction

2 Types of Mixed Metal Oxides

3 Synthesis of Metal Oxide Nanocomposites

4 Charge Transfer Processes and Conductivity

5 Conductivity Mechanism

6 Sensor Properties

7 Mechanism of Sensor Effect

7.1 Sensors Based on Single Nanofibers

7.2 Polycrystalline Sensors

8 Modeling of the Sensory Effect for Reduced Gases

8.1 Qualitative Discussion of the Sensory Mechanism

8.2 Equilibrium Electronic Characteristics Of SnO2

8.3 Sensor Response

9 Conclusions

Acknowledgment

References

8 THE INFLUENCE OF WATER VAPOR ON THE GAS-SENSING PHENOMENON OF TIN DIOXIDE-BASED GAS SENSORS&R.G.Pavelko

1 Introduction

2 Direct Water Effects on Tin Dioxide-Based Gas Sensors

2.1 Undoped SnO2

2.2 Doped SnO2

3 Indirect Water Effects on Tin Dioxide--Based Gas Sensors

3.1 Reducing Gases

3.2 Oxidizing Gases

4 Phenomenological Model

5 Conclusions

Acknowledgments

References

9 COMPUTATIONAL DESIGN OF CHEMICAL NANOSENSORS:TRANSITION METAL-DOPED SINGLE-WALLED CARBON NANOTUBES&Duncan J.Mowbray Juan Maria Garcia-Lastra Iker Larraza Arocena ？ngel Rubio Kristian S.Thygesen Karsten W.Jacobsen

1 Introduction

2 TM-Doped SWNTs as Nanosensors

3 Density Functional Theory

4 Kinetic Modeling

5 Nonequilibrium Green's Function Methodology

5.1 Divacancy Ⅱ

5.2 Divacancy Ⅰ

5.3 Monovacancy

5.4 Target and Background Molecules

6 Sensing Property

7 Conclusions

Acknowledgments

References

1O AL-DOPED GRAPHENE FOR ULTRASENSITIVE GAS DETECTION&Z.M.Ao Q.Jiang S.Li

1 Emerging Graphene-Based Gas Sensors

1.1 The Role of Aluminum Doping in Sensing Applications

2 Aluminum-Doped Graphene for CO Detection

2.1 Sensitivity Enhancement of CO Detection in Aluminum-Doped Graphene

2.2 Effect of Electric Field on CO Detection

2.3 Effect of Temperature on CO Detection

3 Aluminum-Doped Graphene for Formaldehyde Detection

3.1 Adsorption Enhancement with Aluminum Doping

3.2 Variation of Electronic Properties Induced by Adsorption

4 Aluminum-Doped Graphene for Detection of HF Molecules

4.1 Adsorption Enhancement of Aluminum-Doped Graphene

4.2 Adsorption Enhancement Mechanism

4.3 Effect of Electric Field on Adsorption

5 Conclusion and Future Challenges

Acknowledgments

References

11 PHYSICS-BASED MODELING OF SNO2 GAS SENSORS WITH FIELD-EFFECT TRANSISTOR STRUCTURE&P.Andrei L.L.Fields A.J.Soares R.J.Perry Y.Cheng P.Xiong J.P.Zheng

1 Introduction

2 Physics-Based Modeling of the Nanobelts

3 Model Calibration

4 Analytical Model for Nanobelt Sensors

4.1 Case 1:Nanobelt with Ohmic Contacts in the Presence of Hydrogen

4.2 Case 2:Nanobelt with Ohmic Contacts in the Presence of Oxygen

4.3 Case 3:Nanobelt with Schottky Contacts in the Presence of Oxygen

5 Conclusion

Appendix:Fabrication and Experimental Data

References

12 MODELING AND SIMULATION OF NANOWIRE-BASED FIELD-EFFECT BIOSENSORS&S.Baumgartner M.Vasicek C.Heitzinger

1 Introduction

2 Homogenization

3 The Biofunctionalized Boundary Layer

3.1 The Site-Dissociation Model

3.2 Screening and Biomolecules

3.3 Summary

4 The Current Through the Nanowire Transducer

4.1 The Drift-Diffusion-Poisson System

4.2 Self-Consistent Simulations of Sensor Systems

5 Summary

Acknowledgment

References

INDEX