Detection of dilute nitrogen dioxide and thickness effect of tungsten oxide thin film sensors

AbstractSemiconducting oxides are widely known and commercially applied for their gas sensing properties. However, biochemical sensing has mostly depended on optical and electrochemical techniques that are more cumbersome. This work investigates the biosensing characteristics of ZnO nanobelts and ZnO thin films. Zinc oxide thin film sensors showed changes in conductivity after protein functionalization with rabbit IgG and hybridization with anti-rabbit IgG. Conductivity changes were also measured after coating the oxides with MCF-7 cancer cells and its antibodies. In another set of experiments, ZnO nanobelts showed systematic conductivity changes with rabbit IgG protein hybridization. The experimental results in this paper indicate that the conductimetric properties of nano and thin film oxides can be sensitized to protein and cancer cell hybridization reactions. This technique can also be applied to certain other pathogen proteins or toxic proteins from the environment leading to low-cost miniaturized wireless biosensors.

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Sputtering Deposition Parameters and Their Interactions in Amorphous Tungsten Oxide Thin Film as Electrochromic Electrode

ECS Transactions ◽

10.1149/1.2214619 ◽

2019 ◽

Vol 1 (15) ◽

pp. 51-56

Author(s):

Edy J. Widjaja ◽

Gerdy Delporte ◽

Anna-Lena Larsson

Keyword(s):

Thin Film ◽

Tungsten Oxide ◽

Oxide Thin Film ◽

Sputtering Deposition ◽

Deposition Parameters

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The synthetization of the tungsten oxide thin film used for gas sensor applications

10.1063/1.5090082 ◽

2019 ◽

Cited By ~ 1

Author(s):

M. Osiac ◽

N. Cioatera ◽

M. T. Udristioiu

Keyword(s):

Thin Film ◽

Tungsten Oxide ◽

Gas Sensor ◽

Oxide Thin Film ◽

Sensor Applications

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Nanostructured tungsten oxide thin film devices: from optoelectronics and ionics to iontronics

Journal of Materials Chemistry C ◽

10.1039/c9tc04489b ◽

2019 ◽

Vol 7 (42) ◽

pp. 12968-12990 ◽

Cited By ~ 10

Author(s):

Zhenyin Hai ◽

Zihan Wei ◽

Chenyang Xue ◽

Hongyan Xu ◽

Francis Verpoort

Keyword(s):

Thin Film ◽

Tungsten Oxide ◽

Recent Progress ◽

Oxide Thin Film ◽

Development Trends ◽

Challenges And Opportunities ◽

Thin Film Devices

Recent progress of nanostructured tungsten oxide thin film devices is reviewed from optoelectronics and ionics to iontronics with their development trends, challenges, and opportunities analyzed and proposed.

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TEM Study of the Effect of the Sapphire Substrate Surface Orientation on the Microstructure of Tin Dioxide Films

Microscopy and Microanalysis ◽

10.1017/s1431927600032177 ◽

2001 ◽

Vol 7 (S2) ◽

pp. 1220-1221

Author(s):

J. E. Dominguez ◽

L. Fu ◽

X. Q. Pan

Keyword(s):

Thin Film ◽

Laser Ablation ◽

High Performance ◽

Tin Dioxide ◽

Substrate Surface ◽

Sensor Arrays ◽

Pulsed Laser ◽

Pulsed Laser Ablation ◽

Oxide Thin Film ◽

Thin Film Sensors

Tin dioxide (SnO2) has been extensively studied and used as gas sensors to detect toxic gases such as CO, NOxand flammable gases like H2.[l] Recently, considerable researches have focused on thin film sensors due to their high performance as well as their integration compatibility with semiconductor technology for making microsensors and sensor arrays. [2] The performance of thin film sensors is remarkably influenced by the way they were fabricated.[3] Among various deposition techniques, pulsed laser deposition (PLD) has shown great prominence in the deposition of a wide variety of oxide thin film materials such as high Tc superconductors, semiconductors and dielectrics. in this work we present our experimental results on tin dioxide films deposited using pulsed laser ablation on sapphire (α -Al2O3) substrates with different surface orientations.Tin oxide films with a thickness of 100 nm were deposited on the (1012) and (0001) sapphire by pulsed laser ablation of ceramic SnO2 targets.

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