Ion-sensitive field effect transistor (ISFET) sensor is a hot topic these years, playing the combined roles of signal recognizer and converter for (bio)chemical analytes. In this review article, basic concept, origination, history ISFET are presented. addition, common fabrication processes, most-used working principle (potentiometric, amperometric, impedancemetric), techniques gate functionalit...

The recognition of the biologically and environmentally important ions is of great interest in the field of chemical sensors in recent years. The fluorescent sensors as a powerful optical analytical technique for the detection of low level of various analytes such as anions and metal cations have been progressively developed due to the simplicity, cost effective, and selectivity for monitoring ...

Sensitive and rapid label-free biological and chemical sensors are needed for a wide variety of applications including early disease diagnosis and prognosis, the monitoring of food and water quality, as well as the detection of bacteria and viruses for public health concerns and chemical threat sensing. Whispering gallery mode optical resonator based sensing is a rapidly developing field due to...

Chemical detection is still a continuous challenge when it comes to designing single-walled carbon nanotube (SWCNT) sensors with high selectivity, especially in complex chemical environments. A perfect example of such an environment would be in thermally oxidized soybean oil. At elevated temperatures, oil oxidizes through a series of chemical reactions which results in the formation of monoacyl...

The analytical objective of developing sensitive, selective and rapid methods for the analysis of different substances in complex matrices has led to the production of several chemical sensors. Among the analytical applications of chemical sensors, the one involving the early detection of pathogen microorganisms can be considered essential in fields such as, • Food industry • Clinical and envir...

This paper presents two approaches to locate the source of a chemical plume; Nonlinear Least Squares and Stochastic Approximation (SA) algorithms. Concentration levels of the chemical measured by special sensors are used to locate this source. Non-linear Least Squares technique is applied at different noise levels and compared with the localization using SA. For a noise corrupted data collected...

This paper is presented to give an overall view of pressure sensors in the previous two decades. The evolution of sensor technologies, different MEMS pressure sensors, their merits and demerits are discussed. Keywords— Fabry Perot Interferometer (F-P), Pressure Sensors, Electromagnetic Interference (EMI), Low pressure chemical vapour deposition (LPCVD).

Two-dimensional (2D) transition metal dichalcogenides (TMDCs) semiconducting materials have recently attracted wide attention and been regarded as promising building blocks for chemical sensors due to their high surface-to-volume ratio. However, their low response hinders the realization of high-performance 2D TMDCs chemical sensors. Here, we demonstrate the improvement of sensing performance o...