期刊
ADVANCED FUNCTIONAL MATERIALS
卷 24, 期 16, 页码 2374-2382出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201303065
关键词
biosensors; hydrogen sensors; biomedical sensors; thin films; optical sensors
类别
资金
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO) through the ACTS Sustainable Hydrogen program
There is a great interest in the development of reliable and low-cost hydrogen sensors for applications in the hydrogen economy, industrial processes, space application, detection of environmental pollution, and biomedical applications. Here, a new type of optical detector that indicates the presence of hydrogen in concentration range 5 ppm to 0.1 vol% H-2 merely by a reversible and tunable color change is reported. The device takes advantage of the reversible change in optical properties of a Pd-capped Y thin film upon exposure to H-2, while the color is tuned using the interference of light reflected between the Y and Pd layers. In this way, an eye-readable optical sensor that circumvents the need for electronics and external digital readouts is created. Using surface modifications, the performance of the H-2 detector in humid and oxygen rich environment is greatly improved. Therefore, the device has the potential to be used for chemical and also biochemical/biomedical H-2 sensing applications such as breathe hydrogen tests.
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