Facilely prepared composites of polyelectrolytes and graphene as the sensing materials for the detection of very low humidity

Layer-by-layer assembly of functionalized reduced graphene oxide for direct electrochemistry and glucose detection

“…For the GPDDA synthesis, graphite oxide (0.1 g·L −1 ) was dispersed in ultrapure water for exfoliation by sonication for 2 h to form GO, heated at 40°C and dripped in PDDA solution (30 g·L −1 ) at 40°C under vigorous stirring. Then, hydrazine was added to the mixture (0.05 g·L −1 ) and kept at 90°C for 12 h under reflux, filtrated and dried at room temperature in vacuum [37].…”

A new generation gas sensing material based on high-quality graphene

“…This section gives the details of the process of determining the gas sensing properties of the A c c e p t e d M a n u s c r i p t 8 electrical properties of GO and rGO films can be changed [31][32]. Also at high RH, the adsorbed water molecules may be ionized to produce hydronium ions (H 3 O + ) as charge carriers, so this causes the enhancement of ion conduction in addition to electrical conduction [33][34][35].…”

Flexibility and electrical and humidity-sensing properties of diamine-functionalized graphene oxide films

“…This GO can be reduced by various reductants such as hydrazine, sodium borohydride and ascorbic acid [10][11][12]. Recently, many groups have used GO, reduced GO and composite sensing materials to detect humidity [13][14][15][16][17][18]. Yao et al fabricated a humidity sensor by spin-coating chemically derived graphene oxide on a quartz crystal microbalance (QCM) [13].…”

“…Chen et al fabricated a stress-type humidity sensor that was based on a graphene oxide-silicon bi-layer flexible structure [16]. Li et al fabricated a low-humidity sensor by dip-coating composites of poly(diallydimethylammonium chloride) (PDDA)/graphene and poly(4-styrenesulfonate) (PSSNa)/graphene on the surface of the interdigitated gold electrodes [17]. Zhang et al fabricated a resistive-type humidity sensor with chemically reduced graphene oxide/PDDA nanocomposite film by using layer-by-layer (LbL) nano self-assembly method [18].…”