Electrochemical growth of flowerlike gold nanoparticles on polydopamine modified ITO glass for SERS application

Ye, Weichun; Wang, Daoai; Zhang, Hong; Zhou, Feng; Liu, Weimin

doi:10.1016/j.electacta.2009.11.022

Cited by 141 publications

(85 citation statements)

References 34 publications

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“…The interaction between the bound lectin and the ribonucleases was investigated in real time by means of surface plasmon resonance spectroscopy and surface-enhanced laser desorption/ionization mass spectrometry [107]. Polydopamine films deposited on indium tin oxide electrodes and decorated with flowerlike gold nanoparticles can be used as sensing platforms for the ultrasensitive detection of analytes (detection limit of 10 −12 M for rhodamine 6G) in surfaceenhanced Raman scattering [108]. Gold nanoparticles/polyaniline/polydopamine conjugates could be immobilized on electrodes and allowed to electrocatalyze the oxidation of ascorbic acid.…”

Section: Sensing and Biosensing On Polydopamine-coated Substratesmentioning

confidence: 99%

Deposition Mechanism and Properties of Thin Polydopamine Films for High Added Value Applications in Surface Science at the Nanoscale

et al. 2011

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Polydopamine films have been introduced by Messersmith et al. as a possible "versatile" surface functionalization method allowing to coat the surface of almost all known materials even superhydrophobic surfaces. These new kinds of coatings also confer a plethora of functionalities to the coated materials owing to the complex chemistry of the catechol quinone moieties present on the surface of polydopamine. These coatings may hence become an interesting alternative to established surface coatings like selfassembled monolayers and polyelectrolyte multilayered films. In this review, we describe the knowledge acquired in the last 3 years about the deposition mechanisms of polydopamine films, their properties, and various applications in surface science at the nanoscale.

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Section: Sensing and Biosensing On Polydopamine-coated Substratesmentioning

confidence: 99%

Deposition Mechanism and Properties of Thin Polydopamine Films for High Added Value Applications in Surface Science at the Nanoscale

et al. 2011

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“…As shown in Figure 1b, besides the four main Raman vibration modes of anatase, i.e., 141 cm −1 (E g ), 395 cm −1 (B 1g ), 516 cm −1 (A 1g ) and 638 cm −1 (E g ) [35,36], A@PDA also showed two broad Raman bands at around 1354 cm −1 and 1585 cm −1 which match those of pure PDA. These broad bands originate from linear stretching of C-C bonds within the rings and in-plane stretching of the aromatic rings, similar to the D and G bands of carbon nanomaterials such as graphene and graphite [37]. Moreover, TEM images (Figure 1c) of A@PDA samples show a thin surface layer of PDA whose thickness ranges from 1 nm to 5 nm depending on the amount of dopamine hydrochloride precursor added.…”

Section: Physical and Optical Propertiesmentioning

confidence: 96%

The Pros and Cons of Polydopamine-Sensitized Titanium Oxide for the Photoreduction of CO2

2018

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Photocatalytic reduction of CO 2 into fuels is a promising route to reduce greenhouse gas emission, and it demands high-performance photocatalysts that can use visible light in the solar spectrum. Due to its broadband light adsorption, polydopamine (PDA) is considered as a promising photo-sensitization material for semiconductor photocatalysts. In this work, titanium oxides have been coated with PDA through an in-situ oxidation polymerization method to pursue CO 2 reduction under visible light. We have shown that the surface coated PDA with a thickness of around 1 nm can enhance the photocatalytic performance of anatase under visible light to reduce CO 2 into CO. Assisted with additional UV-vis adsorption and photoluminescence characterizations, we confirmed the sensitization effect of PDA on anatase. Furthermore, our study shows that thicker PDA coating might not be favorable, as PDA could decompose under both visible and UV-vis light irradiations. 13 C solid-state nuclear magnetic resonance showed structural differences between thin and thick PDA coatings and revealed compositional changes of PDA after light irradiation.

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“…The Raman spectrograph employed a 1200 g·mm −1 grating and laser excitation at 632.8 nm was used with accumulation time of 5 s. In other words, the onset of Gold reduction occurred at 0.77 V in the initial reverse scan but continued to flow up to 0.84 V in the forward scan. This hysteresis of onset reduction potentials is called a Bnucleation loop^which arises from the over-potential required for nucleation onto the pristine electrode in reference to the Gold deposition onto Gold seeds [49].…”

Section: Characterizationmentioning

confidence: 99%

“…Typically, flower-like nanostructures show high SERS enhancement because of many interstitial sites (or gaps) which can produce extremely intense localized electromagnetic (EM) fields, so called hot spots in SERS measurements [45,46]. In this regard, electrochemical deposition method can prepare high purity of micro/ nanostructures along with well-controlled size, shape, and particle density [47][48][49]. A double-potential deposition technique is good at controlling metal deposition on the conducting solid surface without using any surfactants and/or supporting electrolytes [50].…”

Section: Introductionmentioning

confidence: 99%

Flower-like gold nanostructures electrodeposited on indium tin oxide (ITO) glass as a SERS-active substrate for sensing dopamine

Lee

2015

Microchim Acta

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Flower-like gold nanostructures (so called gold nanoflowers) were electrodeposited on indium tine oxide (ITO) glass and served as a SERS-active substrate for sensing dopamine. A double-potential method was applied for the deposition of gold nanostructures on the glass. The density, size, and morphology of the gold nanostructures were controlled by adjusting parameters such as deposition potentials, duration, and concentrations of gold precursors. The particle density on the glass was controlled by changing the overvoltage potentials, while the size and morphology were controlled by changing the concentration of gold precursors and growth times of Gold crystal seeds. The intensity of the Raman spectrum of dopamine was distinctly enhanced on the gold nanostructures with unique flower-like topography, thereby demonstrating the utility of this SERS-active substrate that is facilely obtained by the double-potential deposition method without supporting electrolytes.

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Electrochemical growth of flowerlike gold nanoparticles on polydopamine modified ITO glass for SERS application

Cited by 141 publications

References 34 publications

Deposition Mechanism and Properties of Thin Polydopamine Films for High Added Value Applications in Surface Science at the Nanoscale

Deposition Mechanism and Properties of Thin Polydopamine Films for High Added Value Applications in Surface Science at the Nanoscale

The Pros and Cons of Polydopamine-Sensitized Titanium Oxide for the Photoreduction of CO2

Flower-like gold nanostructures electrodeposited on indium tin oxide (ITO) glass as a SERS-active substrate for sensing dopamine

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