Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Peter Heszler"'
Publikováno v:
Applied Surface Science. 433:149-154
N-doped TiO2 thin films were prepared using pulsed laser deposition by ablating metallic Ti target with pulses of 248 nm wavelength, at 330 °C substrate temperature in reactive atmospheres of N2/O2 gas mixtures. These films were characterized by spe
Autor:
Claes-Göran Granqvist, L. F. Reyes, Peter Heszler, Eduard Llobet, C Luyo, Zareh Topalian, Walter Estrada, Radu Ionescu
Publikováno v:
Sensors and Actuators B: Chemical. 138:14-20
Nanocrystalline films comprised of NiO particles were prepared by advanced reactive gas evaporation and were investigated for gas sensing applications, specifically for detecting reducing (H2S) and oxidizing (NO2) species. The films were studied in a
Autor:
Tero Mustonen, Hannu Moilanen, Henrik Haspel, Imre Kiricsi, Radu Ionescu, J. Vähäkangas, Geza Toth, Jani Mäklin, Niina Halonen, Attila Csengeri, Zoltan Gingl, Robert Mingesz, Peter Heszler, Krisztian Kordas, Zoltán Kónya, Ákos Kukovecz
Publikováno v:
physica status solidi (b). 245:2343-2346
A low-noise electronic system 'is: bum and tested for fluctuation enhanced sensing. This latter is a new technique and based on the determination of the power spectral density of the stationary resistance fluctuations of semiconductor gas sensors. It
Autor:
Henrik Haspel, Radu Ionescu, Peter Heszler, Jani Mäklin, Ákos Kukovecz, Zoltán Kónya, Tero Mustonen, Krisztian Kordas, Robert Vajtai, Pulickel M. Ajayan, Zoltan Gingl
Publikováno v:
physica status solidi (b). 245:2339-2342
Thin films of functionalized carbon nanotubes were deposited on silicon chips by drop-coating and inkjet printing. These sensors were exposed to 50 ppm N 2 O, CO, H 2 S and H 2 D vail pour in dry synthetic air. We have found relatively small changes
Autor:
Krisztian Kordas, Jani Mäklin, Zoltán Kónya, Ákos Kukovecz, Geza Toth, Zoltan Gingl, Henrik Haspel, J. Vähäkangas, Tero Mustonen, Hannu Moilanen, Pulickel M. Ajayan, Niina Halonen, Peter Heszler, Robert Vajtai
Publikováno v:
physica status solidi (b). 245:2335-2338
Aqueous solutions of carboxyl functionalized single-wall carbon nanotube (SWCNT) films are deposited on silicon chips by the inkjet printing technique. By varying the film thickness it is possible to obtain low- or high density networks of SWCNTs, ha
Publikováno v:
IEEE Sensors Journal. 8:706-713
Conventional agent sensing methods normally use the steady state sensor values for agent classification. Many sensing elements (Hines , 1999; Ryan, 2004; Young, 2003;Qian, 2004; Qian, 2006; Carmel, 2003) are needed in order to correctly classify mult
Publikováno v:
Applied Surface Science. 254:3484-3488
Nitrogen-doped TiO 2 thin films were prepared by pulsed laser deposition (PLD) by ablating metallic Ti target with pulses of 248 nm wavelength in reactive atmospheres of O 2 /N 2 gas mixtures. The layers were characterized by UV–VIS spectrophotomet
Autor:
L. F. Reyes, Laszlo B. Kish, Radu Ionescu, Peter Heszler, Eduard Llobet, Janusz Smulko, C. G. Granqvist
Publikováno v:
physica status solidi (b). 244:4331-4335
Different methods are presented for improving chemical selectivity and sensitivity of semiconductor gas sensors consisting of nanostructured thin films. Pure and doped WO 3 nanoparticles, forming nanoporous layers, are used as test material. The chem
Publikováno v:
Applied Surface Science. 253:8292-8299
We present a number of important characteristics of laser techniques for preparation of nanostructured thin films with foci on laser ablation (LA) and laser-assisted chemical vapor decomposition (LCVD). Size-related features and structures of the dep
Publikováno v:
Nanotechnology Perceptions. 3:43-52
Information theoretical tools are applied for the study of the sensitivity and selectivity enhancements of resistive fluctuation-enhanced sensors. General considerations are given for the upper limit of selectivity enhancement. The signal-to-noise ra