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Diffusion Membranes for Gas Phase Biosensor Devices

Title data

Achmann, Sabine ; Hämmerle, Martin ; Moos, Ralf:
Diffusion Membranes for Gas Phase Biosensor Devices.
Event: The 12th International Meeting on Chemical Sensors, IMCS 12 , 13.-16.07.2008 , Columbus, Ohio, USA.
(Conference item: Conference , Other Presentation type)

Abstract in another language

Porous ceramic membranes have been evaluated for the use as diffusion membranes in a biosensor device. Different hydrophobization strategies are examined in order to acquire gas permeable, but liquid impermeable surfaces. Hydrophobicity was assessed by measurement of the contact angle. Blockage of the pores was counted out by gas permeability tests. Best results were obtained by treatment with a mixture of 2 % chloroorganosilane in toluene (chlorotrimethylsilane, CTMS). The obtained repellent materials with various thicknesses and pore diameters have been successfully used in a biosensor device detecting the analyte formaldehyde directly from the gas phase with formaldehyde dehydrogenase from P. putida as recognition element. The pore diameter did not really affect the sensor characteristic. However, membrane thickness greatly influenced the sensitivity of the device, with best results obtained for a 250 μm membrane.

Further data

Item Type: Conference item (Other)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 03 Jun 2015 06:30
Last Modified: 06 Apr 2016 09:30