Palladium-gate mos devices for arsine detection

Mokwa, W.; Dobos, K.; Zimmer, G.

doi:10.1016/0250-6874(87)80053-7

Cited by 11 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The research analyses [14] evaluate the considerable efforts allocated for developing and researching novel technologies and materials meant to support novel advancements and mitigate the issues in cardiovascular application. Actually, focus is incredibly on the biocompatibility of evaluated materials with the human body.…”

Section: Materials In Cardiovascular Frameworkmentioning

confidence: 99%

Application of Sensors, Actuators and devices in Cardiovascular Treatment

Weller¹,

Dr²

2021

International Journal of Advanced Information and Communication Technology

View full text Add to dashboard Cite

This research paper presents a scholastic analysis, including a technological overview of the most recently done research evaluations and technological accomplishment in the treatment and diagnosis of cardiovascular treatment. The main purpose of this paper is to provide future developers and researchers with critical highlight concerning the achievements and efforts related to devices, actuators and sensors which are essential for the treatment, diagnosis, imaging, mapping and monitoring of the cardiovascular treatment. This scholastic analysis ends by showing the segments of significance and potential areas that require further analysis.

show abstract

Section: Materials In Cardiovascular Frameworkmentioning

confidence: 99%

Application of Sensors, Actuators and devices in Cardiovascular Treatment

Weller¹,

Dr²

2021

International Journal of Advanced Information and Communication Technology

View full text Add to dashboard Cite

show abstract

“…Since these depend for selectivity on the molecular weight of the adsorbed gas molecules, it is possible th a t their properties can be reproduced more reliably th a n for o ther types, b u t this has y et to be confirmed. Chemically sensitive field-effect tran sisto rs (Mokwa et al 1987) and surface acoustic wave devices (Venema et al 1986) are am ong several other types of devices which have possibilities for sensor arrays, b u t selection of th e m ost suitable type of sensor for standardization purposes needs fu rth er investigation. In any event, variations between sim ilarly form ed sensing array s constructed to be as nearly identical as possible for use in transfer stan d ard s can be expected to be sufficiently small to perm it for a definition of smell in term s which are m easurable, albeit w ith a m argin of error y et to be established.…”

Section: Measurementmentioning

confidence: 99%

The characterization of volatile molecular substances

Shurmer

Whitehouse

1993

Proc. R. Soc. Lond. A

View full text Add to dashboard Cite

Diffusion for gaseous sources comprising more than one type of substance is examined to show how relative concentrations change with time and distance. The large variations which are predicted make nonsense of the popular assumption that odour or smell is an intrinsic property of the source material. However, some characterization of volatile chemical substances is needed. It is shown that this is possible by creating a uniform and stable atmosphere after the relapse of sufficient time by introducing the gas mixture into an enclosed space. In this investigation the situation is analysed for a spherical enclosure using Fourier analysis techniques for the long timescale behaviour and the Laplace transform for the short timescale solution. The measurement of odours via the response of sensor arrays within a spherical enclosure is considered and a proposal is made for utilizing such an enclosure in a definition of volatile molecular substances (analogous to biological ‘smell’). The conditions for optimum compatibility between an array of sensors and a set of calibrands are discussed and the practical means of effecting such measurements are considered in relation to known types of sensor. It is concluded that the quality of volatile molecular substances is definable and measurable down to very low gas concentrations in air: probably below 10 parts per billion for a wide range of gas mixtures unconstrained by such limitations associated with a biological nose such as toxicity, temperature and subjective evaluation.

show abstract

Field‐portable Instrumentation

Goedert

2000

Encyclopedia of Analytical Chemistry

View full text Add to dashboard Cite

The analysis of gas and vapors in the field is an important part of the remediation process. The purpose of this article is to familiarize the reader with some of the analytical instruments available today to determine the composition of gaseous samples. Although this section deals with portable instruments, it was found necessary to mention on‐site measurements since this is an important part of field measurements. On‐site measurements are done with conventional analytical instruments operating from recreational vehicles. The samples have to be collected and the first part of this article gives an overview of some of the techniques, such as canister and solid adsorbents, used for this purpose. Identification of compounds collected on‐site or directly in the field can be done by gas chromatography (GC) and mass spectrometry (MS). A comprehensive description of the hardware used with these techniques is provided. An important part of the portable section covers direct‐reading instruments such as gas sensors, electrochemical devices, ionization detectors and colorimetric detectors. These instruments provide only a limited amount of information and, most of the time, require a prior knowledge about the content of the sample. However, they are small, portable and cheaper than laboratory analytical instruments and therefore they have found a market. Portable instruments include miniaturized gas chromatographs and mass spectrometers. These instruments do not offer the high performance of their laboratory counterparts, but they give more information about the sample than direct‐reading instruments. The next step in process measurement sophistication is to combine these techniques. The most popular hyphenated technique is certainly the coupling of a gas chromatograph with a mass spectrometer, but there are also powerful and lesser‐known techniques such as GC combined with ion mobility spectrometry (IMS). IMS has found a market with military applications for the detection of chemical warfare agents. It offers less resolution than MS but operates at atmospheric pressure and is therefore truly portable. When combined with GC it offers some interesting features which will be described.

show abstract

Palladium-gate mos devices for arsine detection

Cited by 11 publications

References 10 publications

Application of Sensors, Actuators and devices in Cardiovascular Treatment

Application of Sensors, Actuators and devices in Cardiovascular Treatment

The characterization of volatile molecular substances

Field‐portable Instrumentation

Contact Info

Product

Resources

About