Field Ionization Humidity Sensors

2019 ◽  
pp. 253-256
Author(s):  
Ghenadii Korotcenkov
Keyword(s):  
Field Ionization ◽  
Humidity Sensors

Field-assisted ionization theory for microscopists

1994 ◽  
Vol 52 ◽  
pp. 820-821
Author(s):  
Patrick P. Camus
Keyword(s):  
Electric Field ◽  
Electron Tunneling ◽  
Ionization Probability ◽  
Critical Distance ◽  
Tunneling Probability ◽  
Field Ionization ◽  
Radius Of Curvature ◽  
Field Evaporation ◽  
A Value ◽  
Ion Emission

The theory of field ion emission is the study of electron tunneling probability enhanced by the application of a high electric field. At subnanometer distances and kilovolt potentials, the probability of tunneling of electrons increases markedly. Field ionization of gas atoms produce atomic resolution images of the surface of the specimen, while field evaporation of surface atoms sections the specimen. Details of emission theory may be found in monographs.Field ionization (FI) is the phenomena whereby an electric field assists in the ionization of gas atoms via tunneling. The tunneling probability is a maximum at a critical distance above the surface,xc, Fig. 1. Energy is required to ionize the gas atom at xc, I, but at a value reduced by the appliedelectric field, xcFe, while energy is recovered by placing the electron in the specimen, φ. The highest ionization probability occurs for those regions on the specimen that have the highest local electric field. Those atoms which protrude from the average surfacehave the smallest radius of curvature, the highest field and therefore produce the highest ionizationprobability and brightest spots on the imaging screen, Fig. 2. This technique is called field ion microscopy (FIM).

scholarly journals Dual-mode humidity detection using a lanthanide-based metal–organic framework: towards multifunctional humidity sensors

2017 ◽  
Vol 53 (32) ◽  
pp. 4465-4468 ◽  
Author(s):  
Yuan Gao ◽  
Pengtao Jing ◽  
Ning Yan ◽  
Michiel Hilbers ◽  
Hong Zhang ◽  
...  
Keyword(s):  
Impedance Spectroscopy ◽  
Humidity Sensor ◽  
Metal Organic Framework ◽  
Dual Mode ◽  
Humidity Sensors ◽  
Highly Effective ◽  
Metal Organic ◽  
Spectroscopy Studies ◽  
Organic Framework

Combined photoluminescence and impedance spectroscopy studies show that a europium-based metal–organic framework behaves as a highly effective and reliable humidity sensor, enabling dual-mode humidity detection.

Pulsed-field ionization electron spectroscopy and conformation of copper-diammonia

2005 ◽  
Vol 122 (21) ◽  
pp. 214316 ◽  
Author(s):  
Shenggang Li ◽  
Bradford R. Sohnlein ◽  
Dong-Sheng Yang ◽  
Jun Miyawaki ◽  
Ko-Ichi Sugawara
Keyword(s):  
Electron Spectroscopy ◽  
Field Ionization ◽  
Pulsed Field ◽  
Ionization Electron ◽  
Pulsed Field Ionization

Comparative performance of linear, cross-linked, and plasma-deposited PMMA capacitive humidity sensors

1994 ◽  
Vol 22 (2) ◽  
pp. 139-147 ◽  
Author(s):  
Andrew R.K. Ralston ◽  
Jeffrey A. Tobin ◽  
Sateesh S. Bajikar ◽  
Denice D. Denton
Keyword(s):  
Humidity Sensors ◽  
Comparative Performance
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