Adsorption of functionalised thiols on gold surfaces: How to build a sensitive and selective sensor for a nitroaromatic compound?

Thery-Merland, F.; Méthivier, Christophe; Pasquinet, Éric; Hairault, Lionel; Pradier, Claire‐Marie

doi:10.1016/j.snb.2005.04.040

Cited by 12 publications

(11 citation statements)

References 24 publications

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“…The PDDA polyelectrolyte used in this case can act as a selective coating to increase the adsorption of DNT on the gold nanoparticle surface owing to the interactions between the electron‐donating amine‐groups in PDDA and the electron‐deficient NO 2 groups of 2,4‐DNT 44. A control Raman experiment of 2,4‐DNT adsorbed on a PDDA‐modified porous membrane (case 1, Figure 3b) provides no measurable signals (spectrum 1, Figure 3c).…”

mentioning

confidence: 99%

Nanoparticle‐Decorated Nanocanals for Surface‐Enhanced Raman Scattering

Tsukruk

2008

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confidence: 99%

Nanoparticle‐Decorated Nanocanals for Surface‐Enhanced Raman Scattering

Tsukruk

2008

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“…In addition, both mechanisms could co-occur. Previous work on MUA monolayers using PM-IRRAS measurements [35] showed that the intensities of the n(COO À ) and n(C=O) vibration modes became stable after 1 h of immersion in MUA solution, although the intensity of the n(CH) mode was still increasing after one hour.…”

Section: Resultsmentioning

confidence: 93%

“…No information was provided in ref. [35] of the kind of layer formed by adsorbing MUA for 1 h and longer. This motivated us to try and elucidate the time-dependent formation of the monolayers using different techniques.…”

Section: Resultsmentioning

confidence: 99%

Probing the Functionalization of Gold Surfaces and Protein Adsorption by PM‐IRRAS

et al. 2011

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The control of morphology and coating of metal surfaces is essential for a number of organic electronic devices including photovoltaic cells and sensors. In this study, we monitor the functionalization of gold surfaces with 11-mercaptoundecanoic acid (MUA, HS(CH(2) )(10) CO(2) H) and cysteamine, aiming at passivating the surfaces for application in surface plasmon resonance (SPR) biosensors. Using polarization-modulated infrared reflection-absorption spectroscopy (PM-IRRAS), cyclic voltammetry, atomic force microscopy and quartz crystal microbalance, we observed a time-dependent organization process of the adsorbed MUA monolayer with alkyl chains perpendicular to the gold surface. Such optimized condition for surface passivation was obtained with a systematic search for experimental parameters leading to the lowest electrochemical signal of the functionalized gold electrode. The ability to build supramolecular architectures was also confirmed by detecting with PM-IRRAS the adsorption of streptavidin on the MUA-functionalized gold. As the approaches used for surface functionalization and its verification with PM-IRRAS are generic, one may now envisage monitoring the fabrication of tailored electrodes for a variety of applications.

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“…The former corresponds to the in-plane bending vibration of NH 2 /NH 3 + 27 and the latter corresponds to NH deformation mode. 28 The band at 1716 cm 21 is assigned to the CLO stretching modes of the COOH group of the MPA, n(CLO). 21 The weak band at 1590 cm 21 results from asymmetric stretching mode of the carboxylate group of the MPA, n as (COO-).…”

Section: Resultsmentioning

confidence: 99%

Investigation of the effects of surface chemistry on adsorption of albumin by surface-enhanced FTIR spectroscopy

et al. 2013

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Zwitterionic materials have recently attracted extensive attention as antifouling materials due to their stability regardless of the temperature. Here we study the adsorption of one plasma protein, human serum albumin (HSA), on the zwitterionic D-penicillamine-modified gold surface by surface-enhanced infrared absorption (SEIRA) spectroscopy. In comparison with the adsorption of HSA on a cysteamine (positive charge) and mercaptopropionic acid (negative charge)-modified gold surface, the amount of adsorbed HSA on the zwitterionic surface was less, but the native structure of the adsorbed HSA was retained, which revealed that the zwitterionic surface was resistant to the protein adsorption. The kinetics study showed that the adsorption of HSA on the three surfaces happened in one of two ways: reversible adsorption or irreversible adsorption resulting from protein unfolding. However, the time constants involved were dramatically larger when HSA was adsorbed on the zwitterionic surface, which further proved its antifouling property. The mechanism was revealed by monitoring the water adsorption. It was found that strongly hydrogen-bonded water played an important role in the protein resistance of the zwitterionic Dpenicillamine-modified gold surface. In addition, competitive binding experiments with site markers revealed that HSA was adsorbed on the zwitterionic surface through domain IIA and IIIA and on the carboxylic acid-terminated surfaces through domain IIA.

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Adsorption of functionalised thiols on gold surfaces: How to build a sensitive and selective sensor for a nitroaromatic compound?

Cited by 12 publications

References 24 publications

Nanoparticle‐Decorated Nanocanals for Surface‐Enhanced Raman Scattering

Nanoparticle‐Decorated Nanocanals for Surface‐Enhanced Raman Scattering

Probing the Functionalization of Gold Surfaces and Protein Adsorption by PM‐IRRAS

Investigation of the effects of surface chemistry on adsorption of albumin by surface-enhanced FTIR spectroscopy

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