EPD of reverse micelle Pd and Pt nanoparticles onto InP and GaN for high-response hydrogen sensors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F12%3A00369352" target="_blank" >RIV/68407700:21340/12:00369352 - isvavai.cz</a>

Alternative codes found

RIV/67985882:_____/12:00374462

Result on the web

<a href="https://doi.org/10.4028/www.scientific.net/KEM.507.169" target="_blank" >https://doi.org/10.4028/www.scientific.net/KEM.507.169</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.507.169" target="_blank" >10.4028/www.scientific.net/KEM.507.169</a>

Result language

angličtina

Original language name

EPD of reverse micelle Pd and Pt nanoparticles onto InP and GaN for high-response hydrogen sensors

Original language description

We investigated properties of nanolayers electrophoretically deposited (EPD) onto semiconductor indium phosphide (InP) or gallium nitride (GaN) single crystals from colloid solutions of metal palladium (Pd), platinum (Pt) or bimetallic Pd/Pt nanoparticles (NPs) in isooctane. Colloids with metal NPs were prepared by reaction of metal compounds with the reducing agent hydrazine in water confined to reverse micelles of surfactant AOT.. Chopped DC electric voltage was applied for the time period to deposit metal NPs, only partly covering surface of the wafer. The deposits were image-observed by scanning electron microscopy (SEM)..Diodes with porous Schottky contacts were made by printing colloidal graphite on the NPs deposited surface and making ohmic contact on the blank side of the wafer. The diodes showed current-voltage characteristics of excellent rectification ratio and barrier height values close to Schottky-Mott limit, which was an evidence of negligible Fermi level pinning. Large increase of current was observed after switching on a flow of gas blend hydrogen in nitrogen (H-2/N-2). The diodes were measured with various H-2/N-2 in the range from 1000 ppm to 1 ppm of H-2. Current change ratios about 10(6) and about 10 were achieved with 1000 ppm and 1 ppm H-2/N-2.

Czech name

—

Czech description

—

Type

C - Chapter in a specialist book

CEP classification

—

OECD FORD branch

21001 - Nano-materials (production and properties)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2012

Confidentiality

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

Book/collection name

Electrophoretic Deposition: Fundamentals and Applications IV

ISBN

978-3-03785-379-5

Number of pages of the result

5

Pages from-to

169-173

Number of pages of the book

260

Publisher name

Trans Tech Publications

Place of publication

Durnten-Zurich

UT code for WoS chapter

—