Regioselective surface functionalization of lithographically designed gold nanorods by plasmon-mediated reduction of aryl diazonium salts

Nguyen, M.T.; Kherbouche, Issam; Gam‐Derouich, Sarra; Ragheb, Iman; Lau-Truong, Stéphanie; Lamouri, Aazdine; Lévi, G.; Aubard, J.; Decorse, Philippe; Félidj, Nordin; Mangeney, Claire

doi:10.1039/c7cc05974d

Cited by 32 publications

(39 citation statements)

References 27 publications

(17 reference statements)

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“…The SEM image and the extinction spectra of the substrate (Figs (a) and 3(b)) confirm that the AuNPs are covered by an organic layer (15–25 nm thick) which grows all around the NPs but also preferentially in the nanogaps between adjacent NPs. Similar growth (Figs (c) and 3(d)) was also observed around prolate NPs deposited by e‐beam lithography and reported in a recent publication with a different diazonium salt …”

Section: Plasmonic Electrochemistrysupporting

confidence: 88%

From active plasmonic devices to plasmonic molecular electronics

Lacroix

Quynh

et al. 2019

Polymer International

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This work is mainly focused on studies combining plasmonic nanostructures and π‐conjugated systems. It describes active molecular plasmonic devices in which π‐conjugated molecules and polymers, grafted on gold nanoparticles, are used to tune the plasmonic properties of metal nanostructures. It also explores two emerging research fields, i.e. plasmonic electrochemistry and plasmonic molecular electronics. In the former, electrochemical reactions are controlled and triggered by plasmons which yield various light‐induced electrochemical reactions at the nanoscale. In the latter, one combines molecular plasmonics and molecular electronics in plasmonic molecular devices. © 2018 Society of Chemical Industry

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Section: Plasmonic Electrochemistrysupporting

confidence: 88%

From active plasmonic devices to plasmonic molecular electronics

Lacroix

Quynh

et al. 2019

Polymer International

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“…As grafting depends on the wavelength and polarization of the incident light, the orientation of the growth of the layer deposited on the AuNPs can be controlled. The mechanism of this plasmon‐induced deposition process is considered to be the transfer of hot electrons from the excited plasmonic NPs to the diazonium salt, triggering the subsequent chemical reactions leading to surface modification [66–68] …”

Section: Resultsmentioning

confidence: 99%

“…[65] Next TPP grafting from diazonium solutions was triggered by localized surface plasmons. Previous works have shown that oligo(bisthienylbenzene) (BTB) [66] and other aromatic units [67] can be deposited onto gold nanoparticles (AuNPs) or in the gaps between gold NP dimers [68] by visible-light illumination for a few minutes without any reducing agent or molecular photocatalyst. As grafting depends on the wavelength and polarization of the incident light, the orientation of the growth of the layer deposited on the AuNPs can be controlled.…”

Section: Electrochemical Characterization Of the Grafted Layersmentioning

confidence: 99%

“…The mechanism of this plasmon-induced deposition process is considered to be the transfer of hot electrons from the excited plasmonic NPs to the diazonium salt, triggering the subsequent chemical reactions leading to surface modification. [66][67][68] Figure 5 shows a scheme of the process. The plasmonic electrode used consists of 100*100 μm 2 arrays of spherical gold NPs (diameter 120 nm) with a 400 nm square grating deposited on ITO by e-beam lithography.…”

Section: Electrochemical Characterization Of the Grafted Layersmentioning

confidence: 99%

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Electrochemical and Plasmon‐induced Grafting of n‐Dopable π‐Conjugated Oligomers

et al. 2021

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The functionalization of electrodes by the reduction of diazonium cations generated in situ from 4- (2,3-diethylthieno[3,4-b] pyrazine-5-yl)aniline has been investigated. The thienopyrazine unit of this molecule is a precursor of n-dopable π-conjugated oligomers. Electrochemical reduction of diazonium cation coats the electrode with organic layers. Raman, IR, and XPS analyses show that their composition corresponds to that of the starting monomer, while AFM scratching measurements indicate thicknesses below 10 nm. The electrochemical responses of various reversible redox couples on the modified electrodes show that the attached layer is insulating in the positive potential range but can be n-doped at negative potential and switches to a conductive state. Moreover, oligo(4- (2,3-diethylthieno[3,4-b] pyrazine-5-yl)phenyl) can be selectively grafted onto gold nanoparticles (AuNPs) by plasmon-induced diazonium reduction. A 10-20 nm-thick organic layer is easily grafted onto each gold nanoparticle by visible-light illumination in a few minutes without any reducing agent or molecular photocatalyst. This result is attributed to the transfer of hot electrons from the excited plasmonic NPs to the diazonium, confirms that localized surface plasmon resonance can induce nanolocalized electrochemical reactions, and contributes to the emerging field of "plasmonic electrochemistry".

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“…Such localized effect can also be used for local photoinduced photoreactivity such as plasmon‐mediated functionalization and polymerization of analytes. To date this has been demonstrated in the visible region, however, such an approach could potentially be applied to mid‐infrared resonances using highly tunable quantum cascade lasers.…”

Section: Resultsmentioning

confidence: 99%

Exploiting Anisotropy of Plasmonic Nanostructures with Polarization Modulation Infrared Linear Dichroism Microscopy (µPM‐IRLD)

Wallace

Read

McRae

et al. 2018

Advanced Optical Materials

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Metallic nanostructures that exhibit plasmon resonances in the mid‐infrared range are of particular interest for a variety of optical processes where the infrared excitation and/or emission can be enhanced. This plasmon‐mediated enhancement can potentially be used toward highly sensitive detection of an analyte(s) by techniques such as surface‐enhanced infrared absorption (SEIRA). To maximize the SEIRA enhancement, it is necessary to prepare highly tuned plasmonic resonances over a defined spectral range that can span over several microns. Noteworthy, nanostructures with anisotropic shapes exhibit multiple resonances that can be exploited by controlling the polarization of the input light. This study demonstrates the role of polarization‐modulation infrared linear dichroism coupled to microscopy measurements (µPM‐IRLD) as a powerful means to explore the optical properties of anisotropic nanostructures. Quantitative µPM‐IRLD measurements are conducted on a series of dendritic fractals as model structures to explore the role of structural anisotropy on the resulting surface‐enhanced infrared absorption and sensing application. Once functionalized with an analyte, the µPM‐IRLD SEIRA results highlight that it is possible to selectively enhance further vibrational modes of analytes making use of the structural anisotropy of the metallic nanostructure.

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Regioselective surface functionalization of lithographically designed gold nanorods by plasmon-mediated reduction of aryl diazonium salts

Cited by 32 publications

References 27 publications

From active plasmonic devices to plasmonic molecular electronics

From active plasmonic devices to plasmonic molecular electronics

Electrochemical and Plasmon‐induced Grafting of n‐Dopable π‐Conjugated Oligomers

Exploiting Anisotropy of Plasmonic Nanostructures with Polarization Modulation Infrared Linear Dichroism Microscopy (µPM‐IRLD)

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