Superior gas-sensing performance of amorphous CdO nanoflake arrays prepared at room temperature

Ye Qing Zhang, Zhe Li, Tao Ling, Sergei A. Kulinich, Xi-Wen Du

Research output: Contribution to journalArticlepeer-review


Highly sensitive and selective detection of volatile organic compounds (VOCs) with fast response time is imperative based on safety requirements, yet often remains a challenge. Herein, we propose an effective solution, preparing a novel gas sensor comprised of amorphous nanoflake arrays (a-NFAs) with specific surface groups. The sensor was produced via an extremely simple process in which a-NFAs of CdO were deposited directly onto an interdigital electrode immersed in a chemical bath under ambient conditions. Upon exposure to a widely used VOC, diethyl ether (DEE), the sensor exhibits excellent performance, more specifically, the quickest response, lowest detection limit and highest selectivity ever reported for DEE as a target gas. The superior gas-sensing properties of the prepared a-NFAs are found to arise from their open trumpet-shaped morphology, defect-rich amorphous nature, and surface CO groups.

Original languageEnglish
Pages (from-to)8700-8706
Number of pages7
JournalJournal of Materials Chemistry A
Issue number22
Early online date29 Apr 2016
Publication statusPublished - 14 Jun 2016

Bibliographical note

Funding: National Basic Research Program of China (2014CB931703); Natural Science Foundation of China (No. 51471115 and 51171127); and FP7 (FP7-PEOPLE-2012-IIF, project no. 330516).


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