Design of nanocomposite film-based plasmonic device for gas sensing

Brahmachari, Kaushik; Ray, Mina

doi:10.1007/s12043-014-0774-x

Cited by 3 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ammonia sensors employing nanoparticle−polymer composites have also been reported. 36,52,53 Even a gold−bio composite used in ammonia sensing has been reported. 54 Here, the sensing action based on a change in the resistance of the nanocomposite film due to exposure to ammonia has been used, thus making it simpler to fabricate and use inexpensively.…”

Section: Introductionmentioning

confidence: 99%

“…Gold nanostars (average size ∼170 nm) were synthesized via a colloidal chemical method and consisted of polyaniline solution to make a thin film on a glass substrate by spin coating. Ammonia sensors employing nanoparticle–polymer composites have also been reported. ,, Even a gold–bio composite used in ammonia sensing has been reported . Here, the sensing action based on a change in the resistance of the nanocomposite film due to exposure to ammonia has been used, thus making it simpler to fabricate and use inexpensively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultrasensitive Gold Nanostar–Polyaniline Composite for Ammonia Gas Sensing

et al. 2015

View full text Add to dashboard Cite

Gold in the form of bulk metal mostly does not react with gases or liquids at room temperature. On the other hand, nanoparticles of gold are very reactive and useful as catalysts. The reactivity of nanoparticles depends on the size and the morphology of the nanoparticles. Gold nanostars containing copper have rough surfaces and large numbers of active sites due to tips, sides, corners, and large surface area-to-volume ratios due to their branched morphology. Here the sensitivity of the gold nanostar-polyaniline composite (average size of nanostars ∼170 nm) toward ammonia gas has been investigated. For 100 ppm ammonia, the sensitivity of the composite increased to 52% from a mere 7% value for pure polyaniline. The gold nanostar-polyaniline composite even showed a response time as short as 15 s at room temperature. The gold nanostars act as a catalyst in the nanocomposite. The stability and sensitivity at different concentrations and the selectivity for ammonia gas were also investigated.

show abstract

Section: Introductionmentioning

confidence: 99%