Vapour sensing using surface functionalized gold nanoparticles

Zhang, Hao‐Li; Evans, Stephen D.; Henderson, J. Gordon; Miles, R.E.; Shen, Tiehan H.

doi:10.1088/0957-4484/13/3/339

Cited by 122 publications

(139 citation statements)

References 27 publications

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“…[14] A combination of metal nanoparticles with responsive polymer shells, surface brushes, or multilayered layer-by-layer films was demonstrated to be prospective hybrid structures for sensing applications. [66][67][68][69][70][71][72][73][74][75] Thus, hybrid structures, which consist of these two very diverse material components, should be considered as a strong design paradigm for responsive materials and structures.…”

Section: Responsive Hybrid Structuresmentioning

confidence: 99%

Bimaterial Microcantilevers as a Hybrid Sensing Platform

et al. 2008

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Microcantilevers, one of the most common MEMS structures, have been introduced as a novel sensing paradigm nearly a decade ago. Ever since, the technology has emerged to find important applications in chemical, biological and physical sensing areas. Today the technology stands at the verge of providing the next generation of sophisticated sensors (such as artificial nose, artificial tongue) with extremely high sensitivity and miniature size. The article provides an overview of the modes of detection, theory behind the transduction mechanisms, materials employed as active layers, and some of the important applications. Emphasizing the material design aspects, the review underscores the most important findings, current trends, key challenges and future directions of the microcantilever based sensor technology.

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Section: Responsive Hybrid Structuresmentioning

confidence: 99%

Bimaterial Microcantilevers as a Hybrid Sensing Platform

et al. 2008

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“…The first example of Au-NP based gas-sensor was proposed in 1998 [19], subsequently, other sensing applications of Au-NPs have followed, mainly based on the use of thiol-capped Au-NPs [20][21], and/or with several different functionalities [22]. Self-assembled coatings from Au-NPs and dendrimers [23], gold nano-triangles [24], were investigated, as well.…”

Section: Introductionmentioning

confidence: 99%

Electrosynthesis and characterization of gold nanoparticles for electronic capacitance sensing of pollutants

Cioffi

Colaianni²,

Ieva

et al. 2011

Electrochimica Acta

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In the present study, gold/surfactant core/shell colloidal nanoparticles with a controlled morphology and chemical composition have been obtained via the so-called sacrificial anode technique, carried out in galvanostatic mode. As synthesized Au-NPs had an average core diameter comprised between 4 and 8 nm, as a function of the electrochemical process experimental conditions. The UVVis characterization of gold nanocolloids showed clear spectroscopic size effects, affecting both the position and width of the nanoparticle surface plasmon resonance peak.The nanomaterial surface spectroscopic characterization showed the presence of two chemical states, namely nanostructured Au (0) (its abundance being higher than 90%) and Au (I) . Au-NPs were then deposited on the top of a capacitive Field Effect sensor and subjected to a mild thermal annealing aiming at removing the excess of stabilizing surfactant molecules. Au-NP sensors were tested towards some gases found in automotive gas exhausts. The sensing device showed the largest response towards NO x , and much smaller -if any-responses towards interferent species such as NH 3 , H 2 , CO, and hydrocarbons.

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“…Hence, the conductivity σ for this structure can be modelled according to the following equation [28][29][30] :…”

mentioning

confidence: 99%

Laser Ablation Direct Writing of Metal Nanoparticles for Hydrogen and Humidity Sensors

et al. 2010

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A UV pulsed laser writing technique to fabricate metal nanoparticle patterns on low-cost substrates is demonstrated. We use this process to directly write nano-particle gas sensors, which operate via quantum tunnelling of electrons at room temperature across the device. The advantages of this method are: no lithography requirements, high precision nanoparticle placement and room temperature processing in atmospheric conditions. Palladium based nanoparticle sensors are tested for the detection of water vapour and Hydrogen within controlled environmental chambers. The electrical conduction mechanism responsible for the very high sensitivity of the devices is discussed with regard to the inter-particle capacitance and the tunnelling resistance.2

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Vapour sensing using surface functionalized gold nanoparticles

Cited by 122 publications

References 27 publications

Bimaterial Microcantilevers as a Hybrid Sensing Platform

Bimaterial Microcantilevers as a Hybrid Sensing Platform

Electrosynthesis and characterization of gold nanoparticles for electronic capacitance sensing of pollutants

Laser Ablation Direct Writing of Metal Nanoparticles for Hydrogen and Humidity Sensors

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