scholarly journals NO gas sensing at room temperature using single titanium oxide nanodot sensors created by atomic force microscopy nanolithography

2016 ◽  
Vol 7 ◽  
pp. 1044-1051 ◽  
Author(s):  
Li-Yang Hong ◽  
Heh-Nan Lin
Keyword(s):  
Atomic Force Microscopy ◽  
Metal Oxide ◽  
Titanium Oxide ◽  
Gas Sensors ◽  
Room Temperature ◽  
Gas Sensing ◽  
Force Microscopy ◽  
Atomic Force ◽  
Single Metal Oxide ◽  
Contact Electrodes

In this work, the fabrication of single titanium oxide nanodot (ND) resistive sensors for NO gas sensing at room temperature is reported. Two atomic force microscopy nanolithography methods, nanomachining and nano-oxidation, are employed. A single titanium nanowire (NW) is created first along with contact electrodes and a single titanium oxide ND is subsequently produced in the NW. Gas sensing is realized by the photo-activation and the photo-recovery approaches. It is found that a sensor with a smaller ND has better performance than a larger one. A response of 31%, a response time of 91 s, and a recovery time of 184 s have been achieved at a concentration of 10 ppm for a ND with a size of around 80 nm. The present work demonstrates the potential application of single metal oxide NDs for gas sensing with a performance that is comparable with that of metal oxide nanowire gas sensors.

scholarly journals Boosting the performance of NO2 gas sensors based on n–n type mesoporous ZnO@In2O3 heterojunction nanowires: in situ conducting probe atomic force microscopic elucidation of room temperature local electron transport

2020 ◽  
Vol 2 (10) ◽  
pp. 4785-4797
Author(s):  
Ramakrishnan Vishnuraj ◽  
Karthikeyan K. Karuppanan ◽  
Mahaboobbatcha Aleem ◽  
Biji Pullithadathil
Keyword(s):  
Atomic Force Microscopy ◽  
Electron Transport ◽  
Gas Sensors ◽  
Room Temperature ◽  
Local Electron ◽  
Force Microscopy ◽  
Atomic Force ◽  
Electron Transport Properties ◽  
Mesoporous Zno

This study emphasis on the effect of n–n heterojunctions in ZnO@In2O3 nanowires on boosting NO2 sensing properties and elucidate the local electron transport properties during sensing process at room-temperature by in situ Conducting Probe Atomic Force Microscopy.

scholarly journals BTEX detection with composites of ethylenevinyl acetate and nanostructured carbon

2017 ◽  
Vol 8 ◽  
pp. 982-988 ◽  
Author(s):  
Santa Stepina ◽  
Astrida Berzina ◽  
Gita Sakale ◽  
Maris Knite
Keyword(s):  
Atomic Force Microscopy ◽  
Carbon Black ◽  
Benzene Ring ◽  
Gas Sensing ◽  
Nanostructured Carbon ◽  
Force Microscopy ◽  
Atomic Force ◽  
Vapour Concentration ◽  
Benzene Toluene ◽  
Acetate Copolymer

By using a solvent-based method composites of ethylenevinyl acetate copolymer and carbon black (EVA–CB) were synthesized for sensing BTEX (benzene, toluene, ethylbenzene and xylene) vapours. The composites were characterized using atomic force microscopy (AFM) in an electroconductive mode. Gas sensing results show that EVA-CB can reproducibly detect BTEX and that the response increases linearly with vapour concentration. Compared to gas-sensing measurements of gasoline vapours, the responses with toluene and ethylbenzene are different and can be explained by varying side chains of the benzene ring.

ATOMIC FORCE MICROSCOPY AND XRD ANALYSIS OF SILVER FILMS DEPOSITED BY THERMAL EVAPORATION

2006 ◽  
Vol 20 (02) ◽  
pp. 217-231 ◽  
Author(s):  
MUHAMMAD MAQBOOL ◽  
TAHIRZEB KHAN
Keyword(s):  
Atomic Force Microscopy ◽  
Grain Size ◽  
Surface Characterization ◽  
Room Temperature ◽  
Thermal Evaporation ◽  
Xrd Analysis ◽  
Force Microscopy ◽  
Atomic Force ◽  
Average Grain Size ◽  
20 Nm

Thin films of pure silver were deposited on glass substrate by thermal evaporation process at room temperature. Surface characterization of the films was performed using X-ray diffraction (XRD) and atomic force microscopy (AFM). Thickness of the films varied between 20 nm and 72.8 nm. XRD analysis provided a sharp peak at 38.75° from silver. These results indicated that the films deposited on glass substrates at room temperature are crystalline. Three-dimension and top view pictures of the films were obtained by AFM to study the grain size and its dependency on various factors. Average grain size increased with the thickness of the deposited films. A minimum grain size of 8 nm was obtained for 20 nm thick films, reaching 41.9 nm when the film size reaches 60 nm. Grain size was calculated from the information provided by the XRD spectrum and averaging method. We could not find any sequential variation in the grain size with the growth rate.

Atomic force microscopy of slip lines in FeAl

1995 ◽  
Vol 10 (9) ◽  
pp. 2159-2161 ◽  
Author(s):  
J.H. Schneibel ◽  
L. Martínez
Keyword(s):  
Atomic Force Microscopy ◽  
Atomic Force Microscope ◽  
Room Temperature ◽  
Frequency Distributions ◽  
Slip Lines ◽  
Force Microscopy ◽  
Atomic Force ◽  
Shear Strains

Fe–40 at. % Al–0.1 at. % B specimens were polished flat, strained at room temperature, and examined in an atomic force microscope. The angles of height contours perpendicular to the slip lines were interpreted as shear strains and were statistically evaluated. The frequency distributions of these shear strains correlated well with the macroscopic strains. The maximum shear strains found were not much larger than the macroscopic strains. In particular, no steep slip steps corresponding to large local shears were found.

Towards a Room Temperature Organic Spin Valve: Structural, Magnetic and Transport Properties of Fe3O4/PTCTE/Co Devices

2011 ◽  
Vol 1359 ◽  
Author(s):  
Mathieu Palosse ◽  
Elena Bedel-Pereira ◽  
François Olivié ◽  
Isabelle Séguy ◽  
Christina Villeneuve ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Current Distribution ◽  
Morphological Study ◽  
Room Temperature ◽  
Spin Valve ◽  
Vibrating Sample Magnetometer ◽  
Force Microscopy ◽  
Dc Sputtering ◽  
Ferromagnetic Electrodes ◽  
Atomic Force

ABSTRACTThis paper describes first steps in preparation of an organic spin valve based on a perylene derivative (PTCTE) sandwiched between magnetite (Fe3O4) and cobalt (Co) ferromagnetic electrodes. MgO(001)/Fe3O4/PTCTE (450 nm)/Co devices were prepared with different Co soft deposition methods: off-axis dc-sputtering or Joule evaporation. Vibrating Sample Magnetometer (VSM) studies of the Fe3O4/PTCTE/Co stacks evidence spin valve behavior with magnetically uncoupled electrodes. These results are correlated with a morphological study by atomic force microscopy (AFM) of each layer and tunneling AFM (TUNA) for the investigation of inhomogeneity of current distribution in the devices. Finally, macroscopic I-V characteristics performed on the same devices will be presented and compared with TUNA results.

scholarly journals Chemical structure imaging of a single molecule by atomic force microscopy at room temperature

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Kota Iwata ◽  
Shiro Yamazaki ◽  
Pingo Mutombo ◽  
Prokop Hapala ◽  
Martin Ondráček ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Single Molecule ◽  
Chemical Structure ◽  
Room Temperature ◽  
Force Microscopy ◽  
Atomic Force
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