8th GOSPEL Workshop. Gas sensors based on semiconducting metal oxides: basic understanding & application fields

Session

Session 2 - Advanced materials – Nanomaterials

20 Jun 2019, 11:10

Ferrara, Italy

Description

Chair: Jong-Heun Lee

44. Gas Sensors Based on Oxide Semiconductors with Porous Nanostructures

Prof. Sun Peng

20/06/2019, 11:10

Invited Talk

Gas sensor as a device composed of sensing material coupled with signal transducer, has been acknowledged as an analytical tool for detection and quantification of inflammable, explosive or toxic gases. The gas sensors based on nanostructured oxide semiconductor endowed with excellent sensing properties have exhibited great potential application in the fields of environmental monitoring,...

29. H2S sensing properties of a diode-type device using ZnO nanorods coupled with CuO nanocrystals

Prof. Tetsuya Kida (Kumamoto University, Japan)

20/06/2019, 11:40

Oral

Introduction
Hydrogen sulfide (H2S) is known as a colorless, flammable and highly toxic gas with strong odor. Therefore, to avoid the risk of its leakage, continuous monitoring of H2S is extremely important. Semiconductor gas sensor is promising for such applications because of its high sensitivity, selectivity, fast response, and good stability. It has been reported in many papers that...

32. Metal Oxides and Noble Metal Additives in the Nanocrystalline Regime. Enhancement of the Performances of Chemoresistive Gas-Sensors and Novel Interpretation Issues

Mauro Epifani

20/06/2019, 12:00

Oral

The modification of metal oxides by additives or dopants is well known for improving the performances of resulting chemoresistive gas-sensors. Common additives are transition metals, dispersed as ions in the oxide structure, or noble metals, usually present as nanoparticles dispersed among the oxide grains. Noble metals may induce electronic sensitization, based on the modification of the...

51. Gas sensing optimization of NiO-SCCNTs core-shell nanostructures by atomic layer deposition

Prof. Nicola Pinna (Institut für Chemie and IRIS Adlershof, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany)

20/06/2019, 12:20

Oral

Hierarchical core-shell (C-S) heterostructures composed of a NiO shell deposited onto the stacked-cup carbon nanotubes (SCCNTs) were synthesized using atomic layer deposition (ALD). By ALD technique, a precisely controlled film of NiO particles was uniformly deposited onto the inner and outer walls of the CNTs. Indeed, by varying the number of ALD cycles from 25 to 700, NiO coating of 0.80 and...

78. A Multi-MOx Sensor Approach to Measure Oxidizing and Reducing Gases

Ehsan Danesh (Alphasense Ltd), John Saffell (Alphasense Ltd)

20/06/2019, 12:40

Oral

Reliable and real-time measurements of gaseous pollutants (e.g., NO₂ and CO) in both indoor and outdoor air are required to implement worldwide air quality legislation designed to protect human health and the environment. While electrochemical sensors are popular for air quality monitoring due to their fast and linear response, low power consumption and excellent selectivity, some...