GOSPEL Workshop on Low Dimensional & Nanostructured Oxides:

Bridging Surface Science and Sensor Science


Tübingen, 15-16 June 2007

This two-day GOSPEL workshop was an opportunity for expert discussion on the opportunities offered by the new class of model systems, single crystal quasi-1D metal oxide nano-structures. These structures will improve our understanding of the fundamental interplay between surface and transport processes in solid state sensors especially at nano-scale and ultimately determine the next generation of solid state gas sensors. In addition to oral presentations and comprehensive discussion sessions there were posters describing recent results.

Scope and programme

The workshop provided plenty of discussions around the relationship between fundamental surface sciences, nanotechnology and sensor research on metal oxides. 

The Presentations are available for download.

15 June 2007

Introduction to the workshop

Nicolae Barsan, Institute of Physical and Theoretical Chemistry, University of Tübingen

An introduction to the aims and expertise of the GOSPEL network, followed by an outline of the goals of this workshop: to review past achievements and recent advances in characterisation, preparation and modelling; and to draw a roadmap for future sensor research.


MOX gas sensors today and tomorrow

Andrei Kolmakov, Physics Department, Southern Illinois University at Carbondale

Knowledge of the surface science of metal oxide (MOX) nano gas sensors is important for understanding of the physics and chemistry of chemi- and bio-sensing of electronic devices. This presentation explores how this knowledge is obtained, and the need for new techniques.


Forms and characteristics of sensing oxides: a historical perspective

S. Semancik, Chemical Science and Technology Laboratory, National Institute of Standards and Technology

Several metal oxides have suitable chemisorption characteristics for gas sensing. This presentation focuses on the composition, crystallographic structure and form of SnO2.


Surface science and chemical semiconductor sensors

Klaus Schierbaum, Abteilung Materialwissenschaft, WE Physik, Heinrich-Heine-Universität Düsseldorf

This presentation examines surface science and chemical semiconductor sensors, with special attention on nanostructures such as nanodiodes and nanorods.


Nanometer and Subnanometer Thin Oxide Films at Surfaces of Late Transition Metals

K Reuter, Fritz-Haber-Institute Berlin, Germany


Surface science and gas sensing

U. Diebold, Tulane University, New Orleans, USA

This presentation discusses surface science investigations of semi conducting metal oxides, in particular SnO2.


Recent trends in metal oxide nanowire gas sensors

Andrei Kolmakov, Physics Department, Southern Illinois University at Carbondale

This presentation explores the recent trends in fabrication, functionalisation and characterisation of metal oxide nanowire gas sensors. It concludes that new techniques will be required to obtain a deeper understanding of the surface properties of nanowire sensors.

16 June 2007

Recent achievements in characterisation of micro and nano materials

Maya Kiskinova, Sincrotrone Trieste

This presentation explores imaging and spectromicroscopy with soft X-rays and recent characterisations of micro and nano materials.


Operando investigations of gas sensing with metal oxide based devices

Nicolae Barsan, Institute of Physical and Theoretical Chemistry, University of Tübingen

Modelling the sensing mechanism of metal oxides nano gas sensors requires information about the state of the sensor surface at the working conditions. This presentation discusses what can be learnt about surface reactions from in-situ electrical and spectroscopic techniques.


Interaction of complex molecules in smell detection with oxide sensors

Dieter Kohl, Institute of Applied Physics, University of Geißen

This presentation explores the characterisation of sensor elements for the detection of complex gas mixtures. Examples used are the differentiation of smoke from soft and hard wood from their constituent lignin monomers, and sensors to control the roasting of coffee beans.


Gas-sensing properties of SnO2 and ZnO based single crystal nanobelts

Yasuhiro Shimzu and Makoto Egashira, Faculty of Engineering, Nagasaki University

This presentation discusses the gas-sensing properties of SnO2 whiskers with different morphologies and surface treatments; and the gas-sensing properties of ZnO whiskers with different morphologies and Li+ doping.


Single crystalline metal oxide nanowires based gas sensors

E. Comini, INFM-CNR, Brescia University

The preparation and characterisation of quasi one dimensional oxidic structures, and their functional characterisation through electrical and optical transduction mechanisms, are discussed in this presentation.


Chemical-electrical transduction studies from electrical measurements on single metal oxide nanowires

J.R. Morante, Department d’Electrònica, Universitat de Barcelona

Nano materials with different structures are useful in investigating the sensing mechanisms and chemical-electrical transduction processes that take place at the surface of metal oxides.


The Presentations are available for download.