In Situ Monitoring of Electrooxidation Processes at Gold Single Crystal Surfaces Using Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopy

Li, Chaoyu; Dong, Jin‐Chao; Jin, Xi; Chen, Shu; Panneerselvam, Rajapandiyan; Rudnev, Alexander V.; Yang, Zhilin; Li, Jianfeng; Wandlowski, Thomas; Zhang, Tian

doi:10.1021/jacs.5b04670

Cited by 121 publications

(111 citation statements)

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“…The authors concluded that, whilst under acidic conditions Au oxidation proceeds directly to AuO, in neutral solutions, the mechanism proceeds via an Au-OH intermediate. This process was later investigated more fully by Li and co-workers, who monitored Au oxidation at Au(111), Au (110) and Au(100) electrodes using EC-SHINERS [112]. They noted that the intensity of the Au-OH bending mode followed the trend Au(111) > Au(110) >> Au(100) which they supposed could explain why the reverse trend is observed for oxygen reduction activity, since the prevalence of Au-OH may retard this reaction.…”

Section: Ec-shinersmentioning

confidence: 99%

Advances in surface-enhanced vibrational spectroscopy at electrochemical interfaces

Wain

O’Connell

2017

Advances in Physics: X

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Electrochemical interfaces are ubiquitous, and characterisation tools that allow us to interrogate them on the molecular scale underpin a wide range of technologies. Because of their dynamic nature, in situ or operando measurement is often necessary, and the coupling of electrochemical techniques with spectroscopic methods is a powerful solution to this challenge. Vibrational spectroscopy in particular can provide important insights into the chemical nature of species adsorbed at electrode surfaces. When combined with electrochemistry, the influence of a potential perturbation to the interface can be studied, helping to build a complete picture of molecular processes in complex electrochemical systems. Here, we review the latest advances in vibrational spectroscopy at electrochemical interfaces, with a focus on surfaceenhanced approaches including surface-enhanced Raman scattering, shell-isolated nanoparticle-enhanced Raman spectroscopy, tip-enhanced Raman spectroscopy and surface-enhanced infrared absorption spectroscopy.

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Section: Ec-shinersmentioning

confidence: 99%

Advances in surface-enhanced vibrational spectroscopy at electrochemical interfaces

Wain

O’Connell

2017

Advances in Physics: X

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“…[ 173 ] New scanning probe microscopy tip structures inspired by SHINERS, such as shell-isolated tip-enhanced spectroscopy (SITERS), are now under development in Zenobi and Li groups. [ 91 ] Copyright 2015, American Chemical Society. The shellisolated mode is also extremely simple and employed in several fi elds such as electrochemistry, surface science and food science.…”

Section: Discussionmentioning

confidence: 99%

“…[ 161,162 ] Therefore, it is imperative to understand the electrocatalytic process to fabricate or design effi cient new catalysts. [ 91 ] As shown in Figure 13 , there is no obvious Raman peak in the range of 300-800 cm −1 during the positive scan until 0.4 V on Au(111) single crystal electrode surface. Most of the reaction mechanisms were deduced based on the electrochemical techniques and combined with the theoretical calculations, but it was still a challenge to prove these results by direct in situ Raman spectra.…”

Section: In Situ Investigation Of Electrooxidation Processes On Au( Hmentioning

confidence: 91%

“…The SERS-active Au NPs core of SHINs act as "signal amplifi ers" which can increase the Raman signals of probe molecules around or adsorbed on the target surface. [75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91][92][93][94] Notably, SHINERS technique employs shell-isolated mode which is different from contact mode and non-contact mode. [ 75 ] As a result, this technique can provide the original information about the target systems.…”

Section: Progress Reportmentioning

confidence: 99%

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Shell‐Isolated Nanoparticle‐Enhanced Raman Spectroscopy at Single‐Crystal Electrode Surfaces

Dong

Panneerselvam

Lin

et al. 2016

Advanced Optical Materials

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As an innovative technique, shell‐isolated nanoparticle‐enhanced Raman spectroscopy (SHINERS) eliminates the material and morphology generality problems of surface‐enhanced Raman spectroscopy (SERS). For the past few years, SHINERS has been extensively employed in many fields, especially in the electrochemistry field. This article renders a brief overview of the developments of SHINERS technique and its applications in electrochemistry. First, we clearly explain the basic principles of the SHINERS technique, such as design principles, materials synthesis, characterization methods, and related theoretical calculation methods. We then describe about the significant applications of electrochemical SHINERS (EC‐SHINERS) with a focus of study on various single‐crystal electrode surfaces. Finally, we summarize the recent developments and give an outlook for future developments in the SHINERS field.

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“…For SERS substrates, these gaps can serve as "hot spots," where the detection of very few molecules has been experimentally realized. Nonlinear optics has been reported upon in several coupling configurations, such as NP-film systems [24], NP-nanowires [25], NP chains [26], nanorod dimers [27], NP dimers [28], and NP prisms [29]. In order to consider quantum plasmonics, gaps less than 1 nm are investigated to clarify the photon-induced electron tunneling between neighboring nanoparticles.…”

Section: Plasmonic Gaps Created By Self-assemblymentioning

confidence: 99%

Survey of plasmonic gaps tuned at sub-nanometer scale in self-assembled arrays

Qian

Wang

et al. 2016

Front. Phys.

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Creating nanoscale and sub-nanometer gaps between noble metal nanoparticles is critical for the applications of plasmonics and nanophotonics. To realize simultaneous attainments of both the optical spectrum and the gap size, the ability to tune these nanoscale gaps at the sub-nanometer scale is particularly desirable. Many nanofabrication methodologies, including electron beam lithography, self-assembly, and focused ion beams, have been tested for creating nanoscale gaps that can deliver significant field enhancement. Here, we survey recent progress in both the reliable creation of nanoscale gaps in nanoparticle arrays using self-assemblies and in the in-situ tuning techniques at the sub-nanometer scale. Precisely tunable gaps, as we expect, will be good candidates for future investigations of surface-enhanced Raman scattering, non-linear optics, and quantum plasmonics. Overview of plasmonicsLight-metal interactions were well exploited in a number of ancient artworks that are now on display around the world. One of the most common examples is the colorful window glass found in many ancient European churches, where the colors actually are a result of the scattering of metallic nanoparticles (NPs) [1]. Another even more famous example is the Lycurgus cup, which shows a strikingly red color when viewed in transmitted light, but turns green in reflected light, as shown in Fig. 1 section of scattering as illustrated in Fig. 1 counterparts [16,17]. Therefore, plasmonics holds great promise for penetration into chemical and biological sensors at tiny volumes, even more so than optoelectronic nanodevices were initially anticipated to accomplish [18,19]. Plasmonic gaps created by self-assemblyDue to strong near-field coupling, the intense electromagnetic field within the plasmonic gaps stimulates continuous development in several disciplines. The first method involves random aggregations triggered by some extraneous chemicals, including molecules, DNA, and ions, which can interrupt the surface charging onto metal NPs. When the suitable molecules or ions are added to the metallic colloids, a color change is visible to the naked eye [34][35][36][37]. Partial aggregations of gold colloids give rise to some plasmonic gaps, inducing the output of the SERS with extraordinarily large enhancements [38,39]. When plasmonic NPs are assembled at the two immiscible phases and even aggregated into volume colloids [40], the spatial distribution of the NPs can be tailored by changing their chemical environments [41,42]. A stepwise strategy to generate regular heterogeneous binary NP arrays has also been reported in the literature [43]. Nowadays, based on this principle of random aggregation, gold colloids have become commercially available in products used as biological detectors, such as oviposit and pregnancy test strips.In the second method, similar to the formation of a "coffee ring", a two-dimensional NP array can be achieved by self-assembly on a liquid/air interface [44]. The NP within the colloid will flow towards the contact ...

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In Situ Monitoring of Electrooxidation Processes at Gold Single Crystal Surfaces Using Shell-Isolated Nanoparticle-Enhanced Raman Spectroscopy

Cited by 121 publications

References 47 publications

Advances in surface-enhanced vibrational spectroscopy at electrochemical interfaces

Advances in surface-enhanced vibrational spectroscopy at electrochemical interfaces

Shell‐Isolated Nanoparticle‐Enhanced Raman Spectroscopy at Single‐Crystal Electrode Surfaces

Survey of plasmonic gaps tuned at sub-nanometer scale in self-assembled arrays

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