Journal ArticleDOI
Near Room Temperature Sensing by In₂O₃ Decorated Silicon Nanowires for Sensitive Detection of Ethanol
TLDR
In this paper, the role of indium trioxide (In2O3) decorated Si nanowires (SiNWs) based resistive sensor for selective detection of ethanol vapors at near room temperature has been successfully demonstrated.Abstract:
The role of indium trioxide (In2O3) decorated Si nanowires (SiNWs) based resistive sensor for selective detection of ethanol vapors at near room temperature has been successfully demonstrated. SiNWs samples were synthesized using metal assisted chemical etching technique and these were decorated by a thin film of indium followed by annealing. The sensing response was captured by measuring the change in resistance of the sensing layer using a Cr-Au inter-digitated-electrode (IDE) structure formed on top of the sensing layers. All sensors were tested for ethanol, acetone, iso-propanol (IPA), xylene, benzene and toluene vapours in the wide concentration range of 5–500 ppm and at different temperatures. Sensors based on SiNWs alone had displayed higher response towards acetone vapours whereas after heterojunction formation with In2O3, significant sensitivity to ethanol was depicted. In2O3 decorated SiNWs resulted in significant enhancement of the sensor response% towards ethanol at near room temperature. Minimum detection of ethanol at 50 ppm and 10 ppm was portrayed by SiNWs and In2O3/SiNWs based sensors respectively. It was concluded that sensing behaviour was a consequence of combinatory effect produced by the presence of both SiNWs and In2O3. A simple explanation with device schematic and band diagrams of the material are proposed to describe the sensing mechanism. This study demonstrates the significance of surface treatment of SiNWs and the role of heterostructures for tuning the sensing properties and development of wafer scalable sensors.read more
Citations
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The Fabrication of High-Anisotropy Silicon Nanowires Based on MACE Method for Photonic Sensor
A. Mohamedyaseen,P. Suresh Kumar +1 more
Journal ArticleDOI
Flexible silicon nanowires sensor for acetone detection on plastic substrates
TL;DR: In this paper , a flexible silicon nanowires (SiNWs) sensor for detecting gaseous acetone with a concentration as low as 0.1 parts per million (ppm) at flat and bending states was presented.
Journal ArticleDOI
Luminescent Silicon Nanowires as Novel Sensor for Environmental Air Quality Control
Dario Morganti,Maria Josè Lo Faro,Antonio Alessio Leonardi,Barbara Fazio,Sabrina Conoci,Alessia Irrera +5 more
TL;DR: In this paper , the synthesis of a low-cost ultra-thin silicon nanowires (Si NWs)-based sensor is reported, which allows the detection of various dangerous gases such as acetone, ethanol, and the ammonia test as a proof of concept in a nitrogen-based mixture.
Journal ArticleDOI
MoS2/SiNWs heterostructure based repeatable and highly responsive photodetector
B.H. Sharmila,Priyanka Dwivedi +1 more
TL;DR: In this paper , the authors presented an efficient, highly responsive and highly repeatable MoS 2 /SiNWs heterostructure based photodetector, which was constructed using a scalable fabrication process.
References
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Journal ArticleDOI
Wet chemical synthesis and characterization of polypodal In2O3 nanoparticles
TL;DR: In this paper, the authors showed that the thermal decomposition of indium oleate in oleyl amine with added water leads to the formation of single crystal, polypodal nanoparticles of In2O3.
Journal ArticleDOI
Controllable synthesis and field emission properties of In2O3 nanostructures
TL;DR: In this paper, the growth mechanisms of these In2O3 nanostructures were analyzed in detail based on the experimental results, which demonstrated that nanorods with rectangular cross-section possessed good performance with a turn-on field of 2.47 Vμm-1 and a field enhancement factor of 4597.
Journal ArticleDOI
Highly sensitive and selective ethanol sensors using magnesium doped indium oxide hollow spheres
TL;DR: In this paper, the gas response of the Mg-doped In2O3 hollow spheres to 5 ppm C2H5OH, p-xylene, toluene, and HCHO were measured at 250, 300 and 350C.
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