Organic Bendable and Stretchable Field Effect Devices for Sensing Applications

Loi, Alberto; Basiricò, Laura; Cosseddu, Piero; Lai, Stefano; Barbaro, Massimo; Bonfiglio, Annalisa; Maiolino, Perla; Baglini, Emanuele; Denei, Simone; Mastrogiovanni, Fulvio; Cannata, Giorgio

doi:10.1109/jsen.2013.2273173

Cited by 25 publications

(16 citation statements)

References 21 publications

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“…Such a finding has been described for different crystalline organic semiconductors such as Rubrene45. In this regime the devices also resist to extensive bending or deformation cycles2746. At a critical strain value of ε ~1% irreversible changes occur and a first strong drop in transistor current is observed.…”

Section: Discussionmentioning

confidence: 53%

Direct imaging of defect formation in strained organic flexible electronics by Scanning Kelvin Probe Microscopy

Cramer

Travaglini

Lai

et al. 2016

Sci Rep

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The development of new materials and devices for flexible electronics depends crucially on the understanding of how strain affects electronic material properties at the nano-scale. Scanning Kelvin-Probe Microscopy (SKPM) is a unique technique for nanoelectronic investigations as it combines non-invasive measurement of surface topography and surface electrical potential. Here we show that SKPM in non-contact mode is feasible on deformed flexible samples and allows to identify strain induced electronic defects. As an example we apply the technique to investigate the strain response of organic thin film transistors containing TIPS-pentacene patterned on polymer foils. Controlled surface strain is induced in the semiconducting layer by bending the transistor substrate. The amount of local strain is quantified by a mathematical model describing the bending mechanics. We find that the step-wise reduction of device performance at critical bending radii is caused by the formation of nano-cracks in the microcrystal morphology of the TIPS-pentacene film. The cracks are easily identified due to the abrupt variation in SKPM surface potential caused by a local increase in resistance. Importantly, the strong surface adhesion of microcrystals to the elastic dielectric allows to maintain a conductive path also after fracture thus providing the opportunity to attenuate strain effects.

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Section: Discussionmentioning

confidence: 53%

Direct imaging of defect formation in strained organic flexible electronics by Scanning Kelvin Probe Microscopy

Cramer

Travaglini

Lai

et al. 2016

Sci Rep

Self Cite

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“…The most common conductive inks for electrodes fabrication are those composed of metal nanoparticles: among these, Ag nanoparticles inks are the most frequently employed, even though some examples of Au nanoparticles inks can be found . The main issue, especially when printing the source and drain electrodes, is to achieve the maximum possible resolution in order to minimize the channel length L , as the transistor's output current is inversely proportional to this parameter …”

Section: Inkjet‐printing Of Organic Transistorsmentioning

confidence: 99%

Inkjet‐Printing: A New Fabrication Technology for Organic Transistors

Mattana

Loi

Woytasik

et al. 2017

Adv Materials Technologies

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123

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Inkjet-printing is one of the most important fabrication techniques in the field of printed electronics. Its main advantages include the possibility of fabricating, at ambient conditions and by employing a digital layout, a large variety of electronic devices on different types of substrates, including flexible plastic ones. In this paper, the utilization of inkjet-printing as an important fabrication tool for the realization of organic transistors and circuits/sensing systems based on such type of transistors is reviewed. The most important aspects of the fabrication process, including ink formulation, printing deposition, and postprinting treatment, are described in detail. The most significant examples of inkjet-printed organic transistors of different types (field-effect, electrolytegated, and electrochemical) are presented and finally an overview of their applications as building blocks of more complex electronic circuits and systems for the detection and quantification of specific measurands is provided.

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“…Such developments suggest the possibility of cheap production processes and material to further reduce the overall cost of molecular diagnostics. The use of low temperature fabrication processes will pave the way to produce FEDs on flexible low cost substrates, such as biodegradable polymers, which show excellent properties [56,64,95,96,97]. The remarkable development of organic and oxide semiconductors based devices and their application in biosensing may established these as a new generation of electronic devices, providing an attractive alternative for DNA based biosensors [95,96,97].…”

Section: Future Perspectivesmentioning

confidence: 99%

Field Effect Sensors for Nucleic Acid Detection: Recent Advances and Future Perspectives

Veigas

Fortunato

Baptista

2015

Sensors

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In the last decade the use of field-effect-based devices has become a basic structural element in a new generation of biosensors that allow label-free DNA analysis. In particular, ion sensitive field effect transistors (FET) are the basis for the development of radical new approaches for the specific detection and characterization of DNA due to FETs’ greater signal-to-noise ratio, fast measurement capabilities, and possibility to be included in portable instrumentation. Reliable molecular characterization of DNA and/or RNA is vital for disease diagnostics and to follow up alterations in gene expression profiles. FET biosensors may become a relevant tool for molecular diagnostics and at point-of-care. The development of these devices and strategies should be carefully designed, as biomolecular recognition and detection events must occur within the Debye length. This limitation is sometimes considered to be fundamental for FET devices and considerable efforts have been made to develop better architectures. Herein we review the use of field effect sensors for nucleic acid detection strategies—from production and functionalization to integration in molecular diagnostics platforms, with special focus on those that have made their way into the diagnostics lab.

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Organic Bendable and Stretchable Field Effect Devices for Sensing Applications

Cited by 25 publications

References 21 publications

Direct imaging of defect formation in strained organic flexible electronics by Scanning Kelvin Probe Microscopy

Direct imaging of defect formation in strained organic flexible electronics by Scanning Kelvin Probe Microscopy

Inkjet‐Printing: A New Fabrication Technology for Organic Transistors

Field Effect Sensors for Nucleic Acid Detection: Recent Advances and Future Perspectives

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