Zobrazeno 1 - 10
of 37
pro vyhledávání: '"H. Steffes"'
Publikováno v:
Sensors and Actuators B: Chemical. 127:210-216
In this paper we report on the optical gas sensitivity of a sputtered multilayer system consisting of InxOyNz thin films and gold-nano-clusters. This system shows a reversible change in the optical absorption (increase or decrease of absorbance) duri
Publikováno v:
Microelectronic Engineering. 83:1197-1200
In this paper we present new results achieved with a sputtered multilayer system consisting of In"xO"yN"z and gold-nano-dots. This system shows not only electrical but also optical gas sensitivity. The optical sensing effect is enhanced by the gold-n
Publikováno v:
Sensors and Actuators A: Physical. :12-17
This paper reports on the thermal analysis of a novel micro hotplate design for metal oxide gas sensors. The hotplate is a 500 μm × 500 μm square shaped membrane made of 2 μm thick polycrystalline 3C–SiC on a silicon substrate suspended by four
Publikováno v:
IEEE Sensors Journal. 4:232-236
In this paper, we describe the optical and electrical gas-sensing properties of In/sub x/O/sub y/N/sub z/ films with an ultrathin gold promoter overlayer. We have fabricated In/sub x/O/sub y/N/sub z/ films with a nanocrystalline porous structure by R
Autor:
H. Steffes, E. Obermeier
Publikováno v:
Sensors and Actuators B: Chemical. 95:252-257
A new combination of gas sensitive materials based on In x O y N z and Ta 2 O 5 capable of detecting traces of combustible gases (CO, H 2 , and CH 4 ) is presented. Compared to pure In x O y N z films (∼120 nm), In x O y N z films using a thin (∼
Publikováno v:
Sensors and Actuators A: Physical. :264-270
The wall-shear-stress is the force parallel to a surface caused by a flow, which propagates parallel to the surface. Although there are several methods in use, there is a lack of sensors able to provide a high time resolution as well as the detection
Publikováno v:
Sensors and Actuators B: Chemical. 78:119-125
A new method for the preparation of sputtered MoO 3 multilayer thin films for the application in gas sensors has been developed. A remarkable change of the crystallinity and the microstructure compared to the whisker-like structure of conventionally
Publikováno v:
Sensors and Actuators B: Chemical. 78:106-112
Metal oxide gas sensors using In 2 O 3 are able to detect low concentrations of NO 2 . The gas sensitive properties of In 2 O 3 can be improved by adding catalysts or promoters. In the present work, the surface modification of reactively RF-sputtered
Publikováno v:
Sensors and Actuators B: Chemical. 78:216-220
A new heated microgas-sensor with only 80 μm ×80 μm active heater area and excellent long-term stability is presented. Using a previously presented SiC based microhotplate and depositing an In 2 O 3 thin film layer on top of the interdigital elect
Publikováno v:
Sensors and Actuators B: Chemical. 77:111-115
A new SiC-based heated micro gas sensor with a 100 μm ×100 μm heated membrane and excellent heater long-term stability is presented. Combining a previously presented micro hotplate with new gas sensitive (2 1 1) oriented In 2 O 3 thin film layers