Next Article in Journal
Determination of Trace Amounts of Hydrofluoric Acid in Non-Aqueous Solutions by the Coulometric Titration Method
Next Article in Special Issue
Synthesis of Cu2O/CuO Nanocrystals and Their Application to H2S Sensing
Previous Article in Journal
Fano Resonance in Waveguide Coupled Surface Exciton Polaritons: Theory and Application in Biosensor
Previous Article in Special Issue
Guiding Ketogenic Diet with Breath Acetone Sensors
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Sensors
Volume 18
Issue 12
10.3390/s18124438
sensors-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Selective Functionalization of High-Resolution Cu2O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance

by
Ju Ye Kim
1,2,†,
Soo-Yeon Cho
1,2,† and
Hee-Tae Jung
1,2,*
1
Department of Chemical and Biomolecular Engineering (BK-21 Plus), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
2
Korea Advanced Institute of Science and Technology (KAIST) Institute for NanoCentury, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Korea
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Sensors 2018, 18(12), 4438; https://doi.org/10.3390/s18124438
Submission received: 21 November 2018 / Revised: 10 December 2018 / Accepted: 13 December 2018 / Published: 15 December 2018
(This article belongs to the Special Issue Functional Materials for the Applications of Advanced Gas Sensors)
Browse Figures
Review Reports Versions Notes

Abstract

Recently, high-resolution patterned metal oxide semiconductors (MOS) have gained considerable attention for enhanced gas sensing performance due to their polycrystalline nature, ultrasmall grain size (~5 nm), patternable properties, and high surface-to-volume ratio. Herein, we significantly enhanced the sensing performance of that patterned MOS by galvanic replacement, which allows for selective functionalization on ultrathin Cu2O nanopatterns. Based on the reduction potential energy difference between the base channel material (Cu2O) and the decorated metal ion (Pt2+), Pt could be selectively and precisely decorated onto the desired area of the Cu2O nanochannel array. Overall, the Pt-decorated Cu2O exhibited 11-fold higher NO2 (100 ppm) sensing sensitivity as compared to the non-decorated sensing channel, the while the channel device with excessive Pt doping showed complete loss of sensing properties.
Keywords: gas sensor; nanopattern; chemical sensitization; galvanic replacement; p-type metal oxide; high-resolution gas sensor; nanopattern; chemical sensitization; galvanic replacement; p-type metal oxide; high-resolution

Share and Cite

MDPI and ACS Style

Kim, J.Y.; Cho, S.-Y.; Jung, H.-T. Selective Functionalization of High-Resolution Cu2O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance. Sensors 2018, 18, 4438. https://doi.org/10.3390/s18124438

AMA Style

Kim JY, Cho S-Y, Jung H-T. Selective Functionalization of High-Resolution Cu2O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance. Sensors. 2018; 18(12):4438. https://doi.org/10.3390/s18124438

Chicago/Turabian Style

Kim, Ju Ye, Soo-Yeon Cho, and Hee-Tae Jung. 2018. "Selective Functionalization of High-Resolution Cu2O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance" Sensors 18, no. 12: 4438. https://doi.org/10.3390/s18124438

APA Style

Kim, J. Y., Cho, S.-Y., & Jung, H.-T. (2018). Selective Functionalization of High-Resolution Cu2O Nanopatterns via Galvanic Replacement for Highly Enhanced Gas Sensing Performance. Sensors, 18(12), 4438. https://doi.org/10.3390/s18124438

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop