OMCVD Gold Nanoparticles Covalently Attached to Polystyrene for Biosensing Applications

Kandeepan, Sivayini; Paquette, Joseph A.; Gilroy, Joe B.; Mittler, Silvia

doi:10.1002/cvde.201507177

Cited by 3 publications

(8 citation statements)

References 74 publications

(72 reference statements)

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“…10 AuNPs were deposited as previously described with modifications. 10 Information regarding the instrumentation (spin coater and UV ozone generator) is documented in the same paper. 10 Fused silica substrates carrying a coupling grating were used as waveguide substrates.…”

Section: Methodsmentioning

confidence: 99%

“…10 Information regarding the instrumentation (spin coater and UV ozone generator) is documented in the same paper. 10 Fused silica substrates carrying a coupling grating were used as waveguide substrates. The spin coating solution was prepared by dissolving 1.5 g of polystyrene in 13 mL of chlorobenzene.…”

Section: Methodsmentioning

confidence: 99%

“…Methyl(trimethylphosphine)gold(I) was synthesized as previously described in the literature . AuNPs were deposited as previously described with modifications .…”

Section: Methodsmentioning

confidence: 99%

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A Mass-Producible and Versatile Sensing System: Localized Surface Plasmon Resonance Excited by Individual Waveguide Modes

et al. 2018

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A plasmonic sensing system that allows the excitation of localized surface plasmon resonance (LSPR) by individual waveguide modes is presented conceptually and experimentally. Any change in the local environment of the gold nanoparticles (AuNPs) alters the degree of coupling between LSPR and a polymer slab waveguide, which then modulates the transmission-output signal. In comparison to conventional LSPR sensors, this system is less susceptible to optical noise and positional variation of signals. Moreover, it enables more freedom in the exploitation of plasmonic hot spots with both transverse electric (TE) and transverse magnetic (TM) modes. Through real-time measurement, it is demonstrated that the current sensing system is more sensitive than comparable optical fiber plasmonic sensors. The highest normalized bulk sensitivity (7.744 RIU) is found in the TM mode. Biosensing with the biotin-streptavidin system shows that the detection limit is on the order of 10 M of streptavidin. With further optimization, this sensing system can easily be mass-produced and incorporated into high throughput screening devices, detecting a variety of chemical and biological analytes via immobilization of the appropriate recognition sites.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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A Mass-Producible and Versatile Sensing System: Localized Surface Plasmon Resonance Excited by Individual Waveguide Modes

et al. 2018

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“…Methyl(trimethylphosphine)gold(I) was synthesized as previously described in the literature. 28 Gold nanoparticles (AuNPs) were deposited as previously described with modifications. 28 S1D).…”

Section: Introductionmentioning

confidence: 99%

“…28 Gold nanoparticles (AuNPs) were deposited as previously described with modifications. 28 S1D). Sample B was not used for spectral study due to the crowdedness of the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Narrowing of Plasmon Resonance Peaks as an Ensemble Effect

2018

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The frequency of localized surface plasmon resonance (LSPR) displayed by gold nanoparticles (AuNPs) redshifts as a function of their local refractive index, which renders them valuable transducers for sensing applications. An ensemble hypothesis is presented herein, along with spectroscopic evidence, using the biotin-streptavidin system on immobilized AuNPs to interpret the decrease in ensemble linewidth (ELW) consistently observed upon functionalization of plasmonic nanoparticles and the subsequent analyte binding. These results demonstrate that ELW can be used to monitor recognition reactions, providing spectral details and a possible sensitivity enhancement to the conventional wavelength sensing. A novel sensing platform allowing the simultaneous measurement of both LSPR wavelength and ELW is proposed, which not only combines the advantages of both parameters but also permits real-time measurement and miniaturization.

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Thermal ranges and figures of merit for gold-containing precursors for atomic layer deposition

Griffiths

Dubrawski

Gordon

et al. 2021

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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This is a survey of known gold-containing chemical vapor deposition (CVD) and atomic layer deposition (ALD) precursors with a focus on collecting their volatilization and decomposition data. These data were applied to a figure of merit (σ) developed to easily assess the thermal characteristics (“volatilization temperature” and the onset of decomposition]) important in the initial assessment of molecules as potential ALD precursors. Of the 46 compounds that were identified, 23 had sufficient thermal data reported in the literature to determine a σ value. The two known gold ALD precursors (15, σ = 104 and 22, σ = 44) were both shown to be in a cluster of excellent precursors. They were each the best in their families of precursors, measured by their σ and their onset of volatility. It was also found that many potentially excellent gold ALD precursors had gold in the +3 oxidation state. Some gold(I) compounds were identified as having good figures of merit (28, σ = 78, 29, σ = 32, 36, σ = 31), but 28 and 29 were found to undergo a reductive elimination reaction at growing gold surfaces, which is a common CVD deposition route for gold(I) compounds. β-diketonates and β-ketoiminates of gold were the most encouraging family of compounds, with σ values of greater than 50. This family contained the precursor with the highest figure of merit (9, σ = 212). These compounds are difficult to make in high yield, but an alternate synthetic route that was identified during this survey might serve to make this class of gold compound competitive as a precursor.

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OMCVD Gold Nanoparticles Covalently Attached to Polystyrene for Biosensing Applications

Cited by 3 publications

References 74 publications

A Mass-Producible and Versatile Sensing System: Localized Surface Plasmon Resonance Excited by Individual Waveguide Modes

A Mass-Producible and Versatile Sensing System: Localized Surface Plasmon Resonance Excited by Individual Waveguide Modes

Narrowing of Plasmon Resonance Peaks as an Ensemble Effect

Thermal ranges and figures of merit for gold-containing precursors for atomic layer deposition

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