Page 9 - Organic Electronics in Sensors and Biotechnology

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2 Organic Thin-Film Transistors for Inorganic
Substance Monitoring . . . . . . . . . . . . . . . . . . . . . . . . 51
2.1 Inorganic Substance Monitoring for Early
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
2.2 OTFT-Based Sensors: A Bird’s-Eye View . . . . 55
2.3 Anthracene-Based Organic Thin-Film
Transistors as Inorganic Analyte
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
2.3.1 Introduction . . . . . . . . . . . . . . . . . . . . . 60
2.3.2 New Materials for OTFT Sensing
Applications . . . . . . . . . . . . . . . . . . . . . 62
2.3.3 Device Performance . . . . . . . . . . . . . . 67
2.3.4 Gas Sensing Measurements . . . . . . . . 71
2.4 Gold Nanoparticle-Modified FET Sensors

for NO Detection . . . . . . . . . . . . . . . . . . . . . . . 75
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2.4.1 Introduction . . . . . . . . . . . . . . . . . . . . . 75
2.4.2 New Materials . . . . . . . . . . . . . . . . . . . 77
2.4.3 Key Features of the Nanostructured
Active Layers . . . . . . . . . . . . . . . . . . . . 78
2.4.4 Gas Sensing Results and Perspectives
of the Study . . . . . . . . . . . . . . . . . . . . . . 83
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
3 Strain and Pressure Sensors Based on Organic
Field-Effect Transistors . . . . . . . . . . . . . . . . . . . . . . . . 93
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
3.2 Working Principles of Organic Field-Effect
Transistor Sensors . . . . . . . . . . . . . . . . . . . . . . . 94
3.3 Strain and Pressure Sensors . . . . . . . . . . . . . . . 96
3.3.1 State of the Art in Strain and
Pressure Sensors Based on Organic
Materials . . . . . . . . . . . . . . . . . . . . . . . . . 96
3.3.2 Substrate-Free Organic Thin-Film
Strain and Pressure Sensors . . . . . . . . 102
3.4 Applications for Organic Field-Effect
Transistor Sensors . . . . . . . . . . . . . . . . . . . . . . . 107
3.4.1 Artificial Sense of Touch . . . . . . . . . . . 107

3.4.2 E-Textiles . . . . . . . . . . . . . . . . . . . . . . . . 110
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
4 Integrated Pyroelectric Sensors . . . . . . . . . . . . . . . . 117
4.1 Electrical Semiconductor and Dielectric
Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
4.1.1 Impedance Spectroscopy (Basics,
Impedance Elements, Ideal and
Nonideal MIS Structures) . . . . . . . . . . 117