Space and aircraft sensors

Gutman, E. E.

doi:10.1016/0925-4005(94)87050-0

Cited by 11 publications

(4 citation statements)

References 2 publications

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“…Furthermore, it has also been used for electrically conductive material, reflective medium and sensor material in space technology due to its high electrical/thermal conductivity and high reflectivity [14][15][16]. For some applications, it must withstand exposure to some extreme operation conditions in low earth orbit (LEO) space environment, especially the bombardment of atomic oxygen (AO).…”

Section: Introductionmentioning

confidence: 99%

Changes in the structure and tribological property of Ag film by LEO space environment exposure

Gao¹,

Hu²,

Sun³

et al. 2014

Applied Surface Science

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Section: Introductionmentioning

confidence: 99%

Changes in the structure and tribological property of Ag film by LEO space environment exposure

Gao¹,

Hu²,

Sun³

et al. 2014

Applied Surface Science

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“…Silver (Ag) has been widely used in space technology such as solid lubricants, electrically conductive materials and reflective medium/sensor materials due to the low shear strength, high electrical/thermal conductivity and high reflectivity [1][2][3][4]. However, for some applications, it must withstand exposure to some extreme operation conditions in low earth orbit (LEO, 200-1000 km) space environment, where atomic oxygen (AO) is a dominant species and exhibits a high activity, flux (~10 13 -10 15 atoms·cm −2 ·s − 1 ) as well as kinetic energy (~5 eV) for an orbit vehicle surface with an orbital velocity of 8 km·s −1 [5,6] and can cause the oxidation and performance deterioration of metallic Ag [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

LEO space environment exposure resistant behavior of Ag–Cu films

Gao

et al. 2015

Surface and Coatings Technology

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“…Such a selective excitation of the tested medium component, as well as photo-induced modification of the surface of a special binding layer, can initiate a reaction of coupling of analyte molecules on the layer surface. It is known, that sensing of excited molecules, free atoms and radicals (instead of particles in a ground state) increases the sensitivity of measurements by several orders of magnitude [10].…”

mentioning

confidence: 99%

<title>Smart integrated transducer for an optoelectronic (bio-) chemical sensor</title>

Beloglazov

Никитин

1994

SPIE Proceedings

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The problem of chemical and biological sensing, i.e., identification of components of various media and measuring their concentrations, is of extreme importance in science, technology, medicine, environmental monitoring, etc.Principally, the problem could be solved by means of purely optical methods, particularly, tunable diode laser spectroscopy [1]. Due to the spectral resolution by an order or two of magnitude higher than Doppler width of spectral lines, it provides ideal selectivity and suitable sensitivity in gas sensing. However, such techniques require bulk, expensive laboratory equipment and qualified personnel. This results in a very high cost of analysis and makes the method unsuitable from the commercial standpoint.A known alternative approach to the problem of media analysis is sensing by microelectronic tools, mainly, through change of resistance or capacitance of semiconducting bulk or thin film samples [2J. Such sensors are rather sensitive, cheap, batch-fabricated, relatively simple in operating and, hence, are most advantageous from a practical point of view. But the problems of selectivity, stability and reproducibility of the microelectronic sensors seem to be hardly solved in the near future.In this connection, the development of new principles of sensors is an urgent need. One of the most powerful tools for both chemical and biological sensing is surface plasmon resonance (SPR) technique. Surface plasmon (SP) is a TM polarized electromagnetic wave which exists at a conductor -dielectric interface and can be optically excited in a resonant manner by means of either a prism in the total internal reflection (TIR) configuration or a grating on the conductor surface [3]. The wave decays exponentially to both sides from the interface and the conditions of SP excitation (angle of incidence of exciting radiation or its wavelength) are extremely sensitive to the properties of a medium near the interface.During the last decade, the Kretschmann technique [4] of SP excitation in the TIR arrangement has been widely used as a base of various sensors. In the work by Liedberg et. al.[5], gas sensors and biosensors based on SPR were proposed. In this method, the position of the intensity minimum of radiation reflected by a metal film covering a prism and contacting with a tested medium is measured. The capability of monitoring media changes corresponding to its refraction index shift in as small as iO was reported. In a case of a sucrose solution testing, the resolution as high as 24 -65 ppm (\n at the level of 106) was achieved [6].However, a sensor relied on the TIR technique of SPs exciting is, substantially, a purely optical one with all intrinsic drawbacks of its practical applications. In particular, one of disadvantages is the necessity of a reflecting beam registration. Such a sensor has to include either a mechanical angular scanning system with a reflected light spot displacement compensation or a photodetector matrix registering the divergent reflected beam passed through a special optics. It makes...

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Space and aircraft sensors

Cited by 11 publications

References 2 publications

Changes in the structure and tribological property of Ag film by LEO space environment exposure

Changes in the structure and tribological property of Ag film by LEO space environment exposure

LEO space environment exposure resistant behavior of Ag–Cu films

<title>Smart integrated transducer for an optoelectronic (bio-) chemical sensor</title>

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