Detection limits of chemical sensors: Applications and misapplications

Optical Chemical Sensors: Design and Applications

Applications and Misapplications of Cognitive Psychology to Mathematics Education

There is a frequent misperception that the move from behaviorism to cognitivism implied an abandonment of the possibilities of decomposing knowledge into its elements for purposes of study and decontextualizing these elements for purposes of instruction. We show that cognitivism does not imply outright rejection of decomposition and decontextualization. We critically analyze two movements which...

Odour Detection Methods: Olfactometry and Chemical Sensors

The complexity of the odours issue arises from the sensory nature of smell. From the evolutionary point of view olfaction is one of the oldest senses, allowing for seeking food, recognizing danger or communication: human olfaction is a protective sense as it allows the detection of potential illnesses or infections by taking into account the odour pleasantness/unpleasantness. Odours are mixture...

Nanoelectronic Chemical Sensors for Chemical Agent and Explosives Detection

A new class of nanometer-scale, low power, solidstate devices is being investigated for the detection of CW agents and other hazardous vapors. These nanoelectronic chemical vapor sensors, or “chemiresistors” are comprised of nanometer-sized gold particles (1.2-2.4nm) encapsulated by monomolecular layers of functionalized alkanethiols (R-SH) deposited as thin films on interdigitated microelectro...

Integration of Chemical Sensors with LSI Technology - History and Applications -

Chemical sensors are one of the oldest fields of research closely related to the semiconductor technology. From the IonSensitive Field-Effect Transistors (ISFET) in the 70’s, through MicroElectro-Mechanical-System (MEMS) sensors from the end of the 80’s, chemical sensors are combining in the 90’s MEMS technology with LSI intelligence to devise more selective, sensitive and autonomous devices to...