Sensitivity of sensor

The most obvious way to raise the sensitivity of sensors to RGMAs is by activating their surface with additives that actively interact with metastable atoms and have some electron coupling with semiconductor. These additives can be microcrystals of metals. As previously shown, the de-excitation of RGMAs on a metallic surface truly proceeds at high efficiency and is accompanied by electron emission. Microcrystals of the metal being applied to a semiconductor surface have some electron coupling with the carrier [159]. These two circumstances allow one to suppose that the activation of metals by microcrystals adds to the sensitivity of semiconductor films to metastable atoms. 

The key principle involved in the electronic nose concept is the transfer of the total headspace of a sample to a sensor array that detects the presence of volatile compounds in the headspace and a pattern of signals is provided that are dependent on the selectivity and sensitivity of sensors and the characteristics of the volatile compounds in the headspace [2]. 

A crucial factor in chromatographic MIP applications is the extensive peak broadening and tailing that results from the bulk effect in the polymer matrix. This is a critical limitation for MIPs in chromatography. Bulk effects are essential in sensory applications, where the sensitivity of sensor coatings depends on a one-step enrichment for an applicable selective incorporation. Instead, chromatographic columns have thousands of plates for an entire separation and hence the inclusion process can be weaker and less selective in comparison to sensor layers. 

Only recently have devices been introduced which are capable of precise measurements of some trace elements their application is limited because the sensitivity of sensors is not adequate to determine trace metals at concentrations present in oceanic areas. A submersible probe for trace metal determination in the water column has been described by Tercier et al. (43) and used to determine Cd, Cu, Pb... 

Several studies have examined the influence of film morphology on sensor behavior [109, 168-178]. Two main areas of interest are the influence of film thickness and grain size on the time scale for sensor response as well as the magnitude (sensitivity) of sensor response. Other factors that may influence the conductivity response are the nature of the semiconductor-metal device contacts, as well as charge accumulation at other device interfaces, such as the gate oxide in field effect sensor devices. 

Explain the use of Young s Principle. What are the advantages of broad sensitivity of sensors rather than very selective sensors ... 

A sensor area with two or more sensors can be obtained using a combination of silicon integrated circuit technology and the MEMS technique. Using sensor arrays, a highly-selective device can be realized. Figure 14.16 shows sensitivities of sensor arrays with four devices at different operating... 

Fig. 5.6. Examples showing measiuements of the sensitivity of sensors to incident...

Moreover, as shown in Fig. 3.30, it is observed that detection ranges of left and right sensors are a little bit different. The areas detected by left and right sensors are not symmetrical. This may be related to different sensitivities of sensors. 

Microcantilever biosensor pSi is fabricated on the surface of crystalline Si microcantilevers by vapor phase stain etch Improved sensitivity of sensor Stolyarova et al. 2008... 

Inhibitory humoral modulators Number of synapses between type I cells and nerve terminals O2 sensitivity of sensor(s) pH sensitivity CO2 sensitivity O2-CO2 interaction Mechanism(s) linking O2 sensor to mediator of type I cell depolarization Large-conductance K currents Background ( leak ) K currents HERG-like K currents Other K" " currents... 

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