Supramolecular fabrication of multilevel graphene-based gas sensors with high NO2 sensibility
Supramolecular fabrication of multilevel graphene-based gas sensors with high NO2 sensibility
复制标题
高NO2灵敏度的多级石墨烯气体传感器的超分子制造
DOI：
10.1039/c5nr01770j
复制
发表时间：
2015-01-01
期刊：
影响因子：
6.7
通讯作者：
Jiang, Lei
中科院分区：
文献类型：
--
作者：
Chen, Zhuo;Umar, Ahmad;Jiang, Lei
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 (pi-pi 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.
