Chemiresistor Sensors Based on Gold Nanoparticle Composites

Daskal, Yelyena; Dittrich, R.; Walter, Juliane; Joseph, Yvonne

doi:10.1016/j.proeng.2015.08.828

Cited by 6 publications

(5 citation statements)

References 18 publications

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“…Further, the constant ratio of gold-bound sulfur vs total gold atoms ( N (S Au)/ N (Au)) observed in all samples indicates that the particle surfaces are equally covered with thiol groups for all samples. As opposed to earlier reports, only slight signs of sulfur oxidation (signals at ∼165 eV to ∼170 eV) were observed in the X-ray photoelectron spectra.…”

Section: Resultscontrasting

confidence: 99%

Tuning the Elasticity of Cross-Linked Gold Nanoparticle Assemblies

Schlicke¹,

Kunze²,

Finsel³

et al. 2019

J. Phys. Chem. C

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Composite materials of organically stabilized or cross-linked metal nanoparticles represent a versatile material class with manifold potential applications. Numerous studies explored their tunable optical and charge transport properties. However, due to challenging experimental requirements, only a few studies addressed their mechanical properties. Here, we report the first investigation on the tunability of the elastic properties of cross-linked gold nanoparticle (GNP) composites. Thin films consisting of GNPs (diameter 3–4 nm) cross-linked with α,ω-alkanedithiols of different chain length, as well as 1,4-benzenedithiol, were fabricated by spin-coating and transferred onto circular apertures with diameters of ∼100 μm. The mechanical properties of thus-prepared freestanding membranes with thicknesses between 21 and 51 nm were probed using bulge tests with atomic force microscopy (AFM) based deflection readout. We demonstrate that, along with their optical and charge transport characteristics, the elastic modulus of these GNP composites can be adjusted in a range from ∼3.6 to ∼10 GPa by shortening the α,ω-alkanedithiol chain length from 10 to 3 methylene units. These variations in elasticity are attributed to the varying fraction of soft organic matter and to structural differences within the composites. Our results provide a basis for further experimental and theoretical studies, as well as for applications of cross-linked nanoparticle composites in future micro- and nanoelectromechanical (MEMS/NEMS) devices, their design, and modeling.

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Section: Resultscontrasting

confidence: 99%

Tuning the Elasticity of Cross-Linked Gold Nanoparticle Assemblies

Schlicke¹,

Kunze²,

Finsel³

et al. 2019

J. Phys. Chem. C

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“…Xie et al 106 investigated that the sensitivity and selectivity of Au NPs for acetone and other volatile organic compounds which got improved when Au NPs are functionalized with thiol monolayer. Daskal et al 107 reported the fabrication of thin-lm composites of Au NPs on a silicon wafer using different organic linkers to detect volatile organic compounds. In situ-decorated with Au NPs on the surface, a three-dimensional tin dioxide nanostructure exhibited high gas sensing performance with high selectivity towards volatile organic compounds.…”

Section: Gold Nanoparticles In Gas Sensingmentioning

confidence: 99%

Gold-carbonaceous materials based heterostructures for gas sensing applications

Kumar

Sengar

et al. 2021

RSC Adv.

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“…Self‐assembled monolayer (SAM) of alkanethiols on metal nanostructures is the most widely used functionalization technique to introduce gas adsorption . It is known that tens of VOC gases can be detected by alkanethiol‐functionalized metal nanostructures . Propanethiol is the mostly used material for functionalization whose main target gases are benzene, toluene, ethylbenzene, xylene, and so forth .…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive VOC gas sensor employing deep cooling of SERS film

Yim

2018

J Raman Spectroscopy

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The potential of surface‐enhanced Raman spectroscopy (SERS) as a highly sensitive and selective gas sensor was investigated experimentally. Especially, the relation between the temperature of a SERS film and gas adsorption or signal intensity was observed systemically and quantitatively, from which the enhancement of gas adsorption and signal intensity by up to 40 times was observed with the SERS film temperature of approx. −80 °C, which corresponds to theoretical anticipation and leads to detection sensitivity defined by limit of detection in 3σ ~1 ppb in case of benzene gas within 2‐min acquisition time. For SERS, Ag nanorod array films functionalized by propanethiol and a spectrometer with a fiber Raman probe and 785‐nm pump laser were employed. The target volatile organic compound gas was benzene. The detection sensitivity of the SERS sensor was ~1 ppm at room temperature within 2‐min acquisition time.

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Chemiresistor Sensors Based on Gold Nanoparticle Composites

Cited by 6 publications

References 18 publications

Tuning the Elasticity of Cross-Linked Gold Nanoparticle Assemblies

Tuning the Elasticity of Cross-Linked Gold Nanoparticle Assemblies

Gold-carbonaceous materials based heterostructures for gas sensing applications

Highly sensitive VOC gas sensor employing deep cooling of SERS film

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