Sensing of phosgene by a porous-like nanocrystalline diamond layer with buried metallic electrodes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00421360" target="_blank" >RIV/68378271:_____/13:00421360 - isvavai.cz</a>

Alternative codes found

RIV/46747885:24510/13:#0000949

Result on the web

<a href="http://dx.doi.org/10.1016/j.snb.2013.07.079" target="_blank" >http://dx.doi.org/10.1016/j.snb.2013.07.079</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.snb.2013.07.079" target="_blank" >10.1016/j.snb.2013.07.079</a>

Result language

angličtina

Original language name

Sensing of phosgene by a porous-like nanocrystalline diamond layer with buried metallic electrodes

Original language description

Nanocrystalline diamond with a porous-like morphology was used as the functional part of a semiconductor gas sensor. The device function is based on the two-dimensional p-type surface conductivity of intrinsic diamond with a H-terminated surface. Metallic electrodes are buried beneath the diamond film. The gas sensing properties of the sensor structure were examined using oxidising gases (i.e., phosgene, humid air) at various operating temperatures. A pronounced and selective increase by two orders of magnitude was found in the surface conductivity after sensor exposure to phosgene gas (20 ppm) at 140°C. Density functional theory calculations indicated no direct charge transfer between the phosgene molecule and diamond. We present a model in which phosgene indirectly yet efficiently increases the H3O+ concentration, which consequently leads to multiplied electron transfer and a pronounced sensor response.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

—

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2013

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Sensors and Actuators B - Chemical

ISSN

0925-4005

e-ISSN

—

Volume of the periodical

188

Issue of the periodical within the volume

NOV

Country of publishing house

CH - SWITZERLAND

Number of pages

6

Pages from-to

675-680

UT code for WoS article

000326345600091

EID of the result in the Scopus database

—