Fluctuation-enhanced sensing with organically functionalized gold nanoparticle gas sensors targeting biomedical applications

Lentka, Łukasz; Kotarski, Mateusz; Smulko, Janusz; Cindemir, Umut; Topalian, Zareh; Granqvist, Claes G.; Calavia, R.; Ionescu, Radu

doi:10.1016/j.talanta.2016.06.063

Cited by 15 publications

(12 citation statements)

References 25 publications

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“…The sensors’ resistance lay between a few kΩ and a few MΩ. Initial electrical characterization was carried out by recording current–voltage ( I – U ) data, and Figure 1 displays a typical non-linear I–U curve with some asymmetry related to a Schottky junction formed between the gold electrodes and the gas-sensing material, which is a p -type semiconductor [8]. …”

Section: Experimental Set-up and Resultsmentioning

confidence: 99%

“…The sensor’s bias voltage ( U B ) was set to either of two values, 5 or 11.3 V, during the measurements. A detailed description of the experiments can be found elsewhere [8]. …”

Section: Experimental Set-up and Resultsmentioning

confidence: 99%

“…The pertinent nanomaterials can be fabricated via a two-step technique wherein AuNPs are first deposited onto a substrate by advanced gas deposition and these nanoparticles are, subsequently, surface-functionalized with organic ligands via a dip-coating process. The gas deposition equipment, and detailed procedures for nanoparticle fabrication and functionalization, has been reported elsewhere [6,7,8]. …”

Section: Introductionmentioning

confidence: 99%

“…The noise originates from adsorption–desorption processes related to electrical charge transfer [12]. The measurement setup was presented in detail in an earlier paper of ours [8]. …”

Section: Introductionmentioning

confidence: 99%

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Non-Gaussian Resistance Fluctuations in Gold-Nanoparticle-Based Gas Sensors: An Appraisal of Different Evaluation Techniques

Lentka

Smulko

Kotarski

et al. 2017

Sensors

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Volatile organic compounds, such as formaldehyde, can be used as biomarkers in human exhaled breath in order to non-invasively detect various diseases, and the same compounds are of much interest also in the context of environmental monitoring and protection. Here, we report on a recently-developed gas sensor, based on surface-functionalized gold nanoparticles, which is able to generate voltage noise with a distinctly non-Gaussian component upon exposure to formaldehyde with concentrations on the ppm level, whereas this component is absent, or at least much weaker, when the sensor is exposed to ethanol or to pure air. We survey four different statistical methods to elucidate a non-Gaussian component and assess their pros and cons with regard to efficient gas detection. Specifically, the non-Gaussian component was clearly exposed in analysis using level-crossing parameters, which require nothing but a modest computational effort and simple electronic circuitry, and analogous results could be reached through the bispectrum function, albeit with more intense computation. Useful information could be obtained also via the Lévy-stable distribution and, possibly, the second spectrum.

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Section: Experimental Set-up and Resultsmentioning

confidence: 99%

“…The sensor’s bias voltage ( U B ) was set to either of two values, 5 or 11.3 V, during the measurements. A detailed description of the experiments can be found elsewhere [8]. …”

Section: Experimental Set-up and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The noise originates from adsorption–desorption processes related to electrical charge transfer [12]. The measurement setup was presented in detail in an earlier paper of ours [8]. …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Non-Gaussian Resistance Fluctuations in Gold-Nanoparticle-Based Gas Sensors: An Appraisal of Different Evaluation Techniques

Lentka

Smulko

Kotarski

et al. 2017

Sensors

Self Cite

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“…Gold nanoparticles (AuNPs), which have unique physical and chemical properties including rapid and easy synthesis, efficient surface-area-to-volume ratios, non-toxicity, and desirable biocompatibility, [26][27][28] are very attractive labels in the biomedical field, and display extreme scattering cross sections and strong absorption. In addition, the gold label silver stain (GLSS) technique is commonly used in conjunction with visible detection like DNA, 29 proteins 30 and bacteria.…”

Section: Introductionmentioning

confidence: 99%

Christmas-tree Derived Amplification Immuno-Strategy for Sensitive Visual Detection of Vibrio parahaemolyticus Based on Gold Label Silver Stain Technology

Song

et al. 2017

ANAL. SCI.

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Recently, Liu and his coworkers designed a Fe(III)-grafted g-C3N4 photocatalyst that displayed an excellent photocatalytic performance. 37 These make it promising in the development of biosensors with high 2017 © The Japan Society for Analytical Chemistry † To whom correspondence should be addressed. A developed Christmas-tree derived immunosensor based on a gold label silver stain (GLSS) technique was fabricated for a highly sensitive analysis of Vibrio parahaemolyticu (VP). In this strategy, captured VP antibody (cAb) was immobilized on a solid substrate; then, the VPs were sequentially tagged with a signal probe by incubating the assay with a detection VP antibody (dAb) conjugated gold nanoparticles (AuNPs)-labeled graphite-like carbon nitride (g-C3N4). Finally, the attached signal probe could harvest a visible signal by the silver meal deposition, and then followed by homebrew Matlab 6.0 as a grey value acquisition. In addition, the overall design of the biosensor was established in abundant AuNPs and g-C3N4 with a two-dimensional structure, affording a bulb-decorated Christmas-tree model. Moreover, with the optimized conditions, the detection limit of the as-proposed biosensor is as low as 10 2 CFU (Colony-Forming Units) mL -1 , exhibiting an increase of two orders of magnitude compared with the traditional immune-gold method. Additionally, the developed visible immunosensor was also successfully applied to the analysis of complicated samples.

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Recent advances in functionalization of plasmonic nanostructures for optical sensing

Amirjani

Rahbarimehr

2021

Microchim Acta

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Fluctuation-enhanced sensing with organically functionalized gold nanoparticle gas sensors targeting biomedical applications

Cited by 15 publications

References 25 publications

Non-Gaussian Resistance Fluctuations in Gold-Nanoparticle-Based Gas Sensors: An Appraisal of Different Evaluation Techniques

Non-Gaussian Resistance Fluctuations in Gold-Nanoparticle-Based Gas Sensors: An Appraisal of Different Evaluation Techniques

Christmas-tree Derived Amplification Immuno-Strategy for Sensitive Visual Detection of Vibrio parahaemolyticus Based on Gold Label Silver Stain Technology

Recent advances in functionalization of plasmonic nanostructures for optical sensing

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