Acoustic transducer including a modified membrane
This disclosure provides systems, methods, and apparatus related to acoustic transducers.
Zettl, Alexander K.↗
Engineering topics
Long, Hu
Publications and source records attributed to Long, Hu.
Zinc stannate microcubes with an integrated microheater for low-temperature NO 2 detection
Low temperature, microcube-shaped zinc stannate (ZnSnO 3 ) nanostructures using a low-power microheater sensor platform to detect NO 2 gas with high sensitivity and selectivity.
Joshi, Nirav↗
In-situ localized growth of porous metal oxide films on microheater platform for low temperature gas detection
A solid-state, low power microheater sensor platform that is configurable with selected metal oxide films for particular gas sensing applications is described. The sensor platform is configured by selecting a chemiresistive or catalytic material that is suitable for detecting a desired gas and then forming a porous nanostructured film on the designated surfaces of the microheater platform. Also described are methods for creating a highly porous, nanostructured metal oxide film in a controlled location from a liquid precursor using a localized heat source. By fast annealing deposited liquid precursors with the microheater, a highly porous, nanocrystalline metal oxide film can be generated in-situ and locally on the sensor platform.
Maboudian, Roya↗
High-Performance Atomically-Thin Room-Temperature NO 2 Sensor
The development of room-temperature sensing devices for detecting small concentrations of molecular species is imperative for a wide range of low-power sensor applications. Here, we demonstrate a room-temperature, highly sensitive, selective, and reversible chemical sensor based on a monolayer of the transition metal dichalcogenide Re 0.5 Nb 0.5 S 2 . The sensing device exhibits thickness dependent carrier type, and upon exposure to NO 2 molecules, its electrical resistance considerably increases or decreases depending on the layer number. The sensor is selective to NO 2 with only minimal response to other gases such as NH 3 , CH 2 O, and CO 2 . In the presence of humidity, not only are the sensing properties not deteriorated, but also the monolayer sensor shows complete reversibility with fast recovery at room temperature. We present a theoretical analysis of the sensing platform and identify the atomically-sensitive transduction mechanism.
47 OTHER INSTRUMENTATION↗