Functionalised zinc oxide nanowire gas sensors: Enhanced NO₂ gas sensor response by chemical modification of nanowire surfaces

• Eric R. Waclawik,
• Jin Chang,
• Andrea Ponzoni,
• Isabella Concina,
• Dario Zappa,
• Elisabetta Comini,
• Nunzio Motta,
• Guido Faglia and
• Giorgio Sberveglieri

Beilstein J. Nanotechnol. 2012, 3, 368–377, doi:10.3762/bjnano.3.43

• ) sensor toward particular target gases in the environment. In this study the effect of an adsorbed organic layer on the dynamic response of zinc oxide nanowire gas sensors was investigated. The effect of ZnO surface functionalisation by two different organic molecules, tris(hydroxymethyl)aminomethane

• target are positive results arising from the coating of these ZnO nanowire sensors with organic-SAM-functionalised ZnO nanoparticles. Keywords: gas sensor; nanowire; tris(hydroxymethyl)aminomethane; self-assembled monolayer; zinc oxide; Introduction Semiconductor gas sensors have been extensively

• innovations in the semiconductor gas-sensing field are still in demand [1][2][3]. Impedance-semiconductor gas sensors typically operate at temperatures greater than 200 °C [4][5]. High operating temperatures are generally required to maximise the sensor response to target gases, either to activate the

Nanostructures for sensors, electronics, energy and environment

• Nunzio Motta

Beilstein J. Nanotechnol. 2012, 3, 351–352, doi:10.3762/bjnano.3.40

• and reduce the power consumption in gas sensors. Nanoelectronics is the next step in the electronic roadmap, with many devices currently in production already containing components smaller than 100 nm. Molecules [1][2] and conducting polymers [3] are at the forefront of this research with the goal of

Noncontact atomic force microscopy study of the spinel MgAl₂O₄(111) surface

• Morten K. Rasmussen,
• Kristoffer Meinander,
• Flemming Besenbacher and
• Jeppe V. Lauritsen

Beilstein J. Nanotechnol. 2012, 3, 192–197, doi:10.3762/bjnano.3.21

• ); polar surfaces; reconstructions; spinel; Introduction While the application of metal oxides in, e.g., catalysis, gas sensors, fuel cells, high-k dielectrics and corrosion protection has seen a very strong development, fundamental research on the surface properties of metal oxides has been a topic of

Investigation on structural, thermal, optical and sensing properties of meta-stable hexagonal MoO₃ nanocrystals of one dimensional structure

• Angamuthuraj Chithambararaj and
• Arumugam Chandra Bose

Beilstein J. Nanotechnol. 2011, 2, 585–592, doi:10.3762/bjnano.2.62

• always been one of the most fascinating challenges as the properties of nanomaterials are essentially determined by their phase, shape, size and chemical composition [1]. Recently, molybdenum oxide and its compounds have aroused interest for various potential applications, such as gas sensors, highly