Using colloidal lithography to control the formation of gas sorption sites through galvanic replacement reaction

[Display omitted] Using colloidal lithography, a series of inverted long-range ordered crystals (i-LROCs) of Pd honeycombs were fabricated on quartz crystal microbalance (QCM) sensors. The structures formed provided the required platform for the proceeding galvanic replacement reaction (GR) process...

Full description

Saved in:
Bibliographic Details
Published in:Journal of colloid and interface science 2019-07, Vol.547, p.199-205
Main Authors: Lay, Bebeto, Sabri, Ylias M., Kandjani, Ahmad E., Bhargava, Suresh K.
Format: Article
Language:English
Subjects:
Bimetallic
Colloidal lithography
Galvanic replacement
Gas sensing
Surface patterning
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] Using colloidal lithography, a series of inverted long-range ordered crystals (i-LROCs) of Pd honeycombs were fabricated on quartz crystal microbalance (QCM) sensors. The structures formed provided the required platform for the proceeding galvanic replacement reaction (GR) process to generate seamless Au nanoparticle deposits throughout the i-LROC. The results showed that controlling the dimensions of the pores in the developed Pd i-LROCs is important in the formation of gold deposition sites on the uniform structures through the GR reaction process. The developed Pd/Au i-LROC deposited sensors showed significant enhancement in the sensitivity toward Hg0 vapor when compared to pure Pd structures, with limit of detection improving from 60.0 to 13.7 µg/m3, respectively. Furthermore, a significant improvement in the modified sensor’s selectivity toward Hg0 in the presence of other industrial related gas species was observed which is attributed to the addition of Au to the Pd structures through GR reaction.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2019.04.001