Supramolecular fabrication of multilevel graphene-based gas sensors with high NO2 sensibility

Zhuo Chen, Ahmad Umar, Shiwei Wang, Yao Wang, Tong Tian, Ying Shang, Yuzun Fan, Qi Qi, Dongmei Xu, Lei Jiang

Research output: Contribution to journalArticleResearchpeer-review

48 Citations (Scopus)


This study reports the supramolecular assembly of a silver nanoparticle-naphthalene-1-sulphonic acid-reduced graphene oxide composite (Ag-NA-rGO) and its utilization to fabricate a highly sensitive and selective gas sensor. The prepared supramolecular assembly acted not only as a non-covalent functionalization platform (π-π interaction) but was also an excellent scaffold to fabricate a highly sensitive and selective low concentration NO2 gas sensor. The prepared composites were characterized using several techniques, which revealed that the graphene sheets were dispersed as ultrathin monolayers with a uniform distribution of silver nanoparticles. The fabricated multilevel structure exhibited an excellent sensing performance, i.e. 2.8 times better, towards 10 ppm NO2 compared to the NA-rGO and rGO based sensors. Apart from its high sensitivity, superior reversibility and selectivity, the prepared supramolecular assembly exhibited an outstanding linear response over the large concentration range from 1 ppm to 10 ppm. The obtained results demonstrate that the prepared supramolecular assembly holds great potential in the fabrication of efficient and effective low-concentration NO2 gas sensors for practical applications.

Original languageEnglish
Pages (from-to)10259-10266
Number of pages8
Issue number22
Publication statusPublished - 14 Jun 2015
Externally publishedYes

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