Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12779/6389
Title: Gas-sensing properties and modeling of silver doped potassium hollandite
Authors: Fort, Ada
Addabbo, Tommaso
Vignoli, Valerio
Bertocci, Francesco
Mugnaini, Marco
Atrei, Andrea Massimo 
Gregorkiewitz, Michael
Issue Date: 2014
Project: None 
Journal: SENSORS AND ACTUATORS. B, CHEMICAL
Abstract: 
In this paper the gas sensing properties of Ag–K-hollandite prepared by K–Ag ion exchange are investi- gated. The proposed material was used as the active layer of micromachined conductometric gas sensors and tested in different environmental conditions with a number of target gases such as CO and NOx . The response to test gases was evaluated in a temperature interval from 200 to 350 ◦ C where surface phe- nomena can completely explain the sensor behavior. The proposed material was studied also by means of XPS and thermal analyses. The investigated material is a p-type semiconductor and shows a repro- ducible response and a complete recovery. Data obtained are discussed and a model based on surface states describing the material behavior is proposed.
Description: 
59662
URI: http://hdl.handle.net/20.500.12779/6389
ISSN: 0925-4005
DOI: 10.1016/j.snb.2013.12.102
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