Highly‐Ordered Covalent Anchoring of Carbon Nanotubes on Electrode Surfaces by Diazonium Salt Reactions

Fuentes, Olimpia Arias de; Ferri, Tommaso; Frasconi, Marco; Paolini, Valerio; Santucci, Roberto

doi:10.1002/ange.201006743

Cited by 15 publications

(3 citation statements)

References 44 publications

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“…Fortunately, the electrodeposition method for fabrication of imprinted membranes can control the thickness of the imprinted membrane properly by means of dominating the electrodepositing current. Recently, a simple and feasible method anchoring carbon nanotubes on the electrode surface by use of diazonium salt reactions has been reported, 14 providing the possibility for anchoring GO onto the electrode surface. In this case, the modication of graphene sheets on the electrode surface becomes a reality.…”

Section: Introductionmentioning

confidence: 99%

Molecularly imprinted electrochemical sensor based on a reduced graphene modified carbon electrode for tetrabromobisphenol A detection

Chen

Zhang

Cai

et al. 2013

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A simple strategy for the indirect detection of 3,3',5,5'-tetrabromobisphenol A (TBBPA) was developed with a surface imprinted sensor based on an electrochemical reduced graphene modified carbon electrode. The preparation procedure of imprinted electrode and the response mechanism of the imprinted electrode toward TBBPA are discussed in detail. The electrochemical characteristics of the imprinted sensor were investigated using cyclic voltammetry and their morphologies were characterized using scanning electron microscopy. The indirect detection for TBBPA was successfully implemented by monitoring the peak current of Fe(CN)6(3-/4-)-TBBPA complex. The response currents of the imprinted sensor exhibited a linear relationship toward the TBBPA concentration range from 0.5 to 4.5 nM with a detection limit of 0.23 nM (S/N = 3). The fabricated electrochemical imprinted sensor was successfully applied to the detection of TBBPA in rain and lake water samples using the standard addition method. With the advantages of high sensitivity and simple operation, the determination methodology is a promising candidate for TBBPA detection in real water samples.

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Section: Introductionmentioning

confidence: 99%

Molecularly imprinted electrochemical sensor based on a reduced graphene modified carbon electrode for tetrabromobisphenol A detection

Chen

Zhang

Cai

et al. 2013

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“…[10] Recently, we reported the formation of dense arrays of SWCNT "forests" on different substrates by using diazonium salt coupling. [11] Nevertheless, a valid alternative is represented by the noncovalent direct immobilization of SWCNTs on a surface, since in this case no structural alteration of the SWCNTs occurred. [12] In view of the growing interest in the construction of simple and cost-effective systems, we report herein a new strategy to achieve a spatially controlled SWCNT assembly on a gold surface by exploiting p-p interactions.…”

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Spatially Oriented and Reversible Surface Assembly of Single‐Walled Carbon Nanotubes: A Strategy Based on π–π Interactions

et al. 2011

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The unique structural, mechanical, and electronic properties of carbon nanotubes (CNTs) have resulted in their development into a standard material for a variety of applications. In particular, CNTs have been widely investigated for electronic applications, which include use as transistors, [1] photovoltaic devices, [2] active sensing elements, [3] and building blocks for biosensors. [4] One of the main challenges currently involves assembling CNTs on a substrate in a manner that allows the secondary association of redox-active components to the CNTs and rapid electron transfer along the tubes. [4a] To this end, functional groups are formed at the CNT edges in order to ensure stable anchoring. [5,6] Alternative routes exploit the physical adsorption of either hydrophilic groups [7] or watersoluble polymers on the CNT walls. [8] Although polymercoated CNTs were used for the functionalization of different surfaces, [8] this method has severe limitations when fabricating highly oriented single-walled CNT (SWCNT) arrays. Indeed, the ability to prepare vertically aligned SWCNTs is a crucial point for improving the performance of nanodevices. [9] Covalent attachment of vertically aligned SWCNTs is usually achieved by amide linkages. [10] Recently, we reported the formation of dense arrays of SWCNT "forests" on different substrates by using diazonium salt coupling. [11] Nevertheless, a valid alternative is represented by the noncovalent direct immobilization of SWCNTs on a surface, since in this case no structural alteration of the SWCNTs occurred. [12] In view of the growing interest in the construction of simple and cost-effective systems, we report herein a new strategy to achieve a spatially controlled SWCNT assembly on a gold surface by exploiting p-p interactions. To the best of our knowledge, no report on the oriented and reversible assembly of SWCNTs on a surface by using noncovalent p-p stacking interactions has been reported to date. In particular, the proposed method is based on the spontaneous adsorption of SWCNTs on self-assembled monolayers (SAMs) of suitable aromatic molecules. To this end, a stable dispersion of purified SWCNTs (HiPCO) in DMF was obtained by sonication, as previously described. [13] The average length of the suspended SWCNTs was 60-120 nm, as evaluated by transmission electron microscopy (TEM).The adsorption of SWCNTs was achieved by immersing Au surfaces that were modified with SAMs of phenylthiol (PT), 4,4'-dithiobipyridine (DTBPY), and biphenylthiol (BPT) overnight in a suspension of SWCNTs. The adsorption kinetics were investigated by using a quartz crystal microbalance (QCM). The frequency changes (Df) of the Au/quartz crystal modified with different SAMs increased upon the immobilization of SWCNTs ( Figure S1 in the Supporting Information). After the adsorption was complete (ca. 90 min), we estimated that approximately 3.4 AE 0.2 (Df = À572 Hz), 3.9 AE 0.1 (Df = À658 Hz), and 6.7 AE 0.2 (Df = À1125 Hz) mg cm À2 of SWCNTs were present on the surface modified with PT, DTBPY, and...

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“…Covalent attachment of vertically aligned SWCNTs is usually achieved by amide linkages 10. Recently, we reported the formation of dense arrays of SWCNT “forests” on different substrates by using diazonium salt coupling 11. Nevertheless, a valid alternative is represented by the noncovalent direct immobilization of SWCNTs on a surface, since in this case no structural alteration of the SWCNTs occurred 12.…”

mentioning

confidence: 99%

Spatially Oriented and Reversible Surface Assembly of Single‐Walled Carbon Nanotubes: A Strategy Based on π–π Interactions

et al. 2011

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Nanoröhren freigesetzt: Die π‐π‐Stapelwechselwirkungen zwischen einwandigen Kohlenstoffnanoröhren (SWCNTs) und einer auf einer Goldoberfläche verankerten Monoschicht aromatischer Ringe bewirken eine reversible Assoziation der SWCNTs an der Oberfläche. Die Protonierung einer pyridinbasierten selbstorganisierten Monoschicht verringert die Pyridin‐SWCNT‐Wechselwirkung und setzt so die SWNCTs frei (siehe Bild).

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Highly‐Ordered Covalent Anchoring of Carbon Nanotubes on Electrode Surfaces by Diazonium Salt Reactions

Cited by 15 publications

References 44 publications

Molecularly imprinted electrochemical sensor based on a reduced graphene modified carbon electrode for tetrabromobisphenol A detection

Molecularly imprinted electrochemical sensor based on a reduced graphene modified carbon electrode for tetrabromobisphenol A detection

Spatially Oriented and Reversible Surface Assembly of Single‐Walled Carbon Nanotubes: A Strategy Based on π–π Interactions

Spatially Oriented and Reversible Surface Assembly of Single‐Walled Carbon Nanotubes: A Strategy Based on π–π Interactions

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