Sensor Functionalities in Self-Assembled Monolayers

Flink, Simon; Veggel, van Frank C.J.M.; Reinhoudt, David N.

doi:10.1002/1521-4095(200009)12:18<1315::aid-adma1315>3.0.co;2-k

Cited by 386 publications

(144 citation statements)

References 58 publications

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“…Both techniques have been widely used, in either the presence or the absence of a redox probe, on one hand to determine the size and number of defects in the SAM, and on the other to evaluate the double layer capacitance of the modified electrode and whence the average thickness of the organic layer. 46,47 Though in CV large potential sweeps (of the order of 0.1 to 1 V) are applied to the electrode/solution interface and the resulting dc current is measured, in EIS the interface is usually kept at its rest potential and probed by using a smallamplitude (typically e20 mV) sinusoidal voltage. Hence EIS is a much less disturbing technique than CV.…”

Section: Xps Analysismentioning

confidence: 99%

“…47,48 Figure 6a shows the impedance spectra obtained at various potentials: the incomplete semicircles that rapidly shrink upon increasing overpotential (under the present conditions, the open circuit potential, E oc , coincides with E°[ Fe(CN6)] 3-/4-) 0.18 V) are associated with the slow electron transfer kinetics experienced by the redox probe at the modified electrode. [46][47][48] An alternative presentation of the impedance data is shown in Figure 6b where the complex capacitance C is displayed (C plot). C is defined as 1/jωZ, where j ) -1 1/2 and ω is the angular frequency ()2πf).…”

Section: Xps Analysismentioning

confidence: 99%

“…The C plot emphasizes the interface response at higher frequencies with respect to the Z plot. 53,54 Notice that, in the framework of an equivalent circuit description of the electrochemical interface, 47,48 a semicircle in the Z plot corresponds to a parallel RC (resistor, capacitor) arrangement and a straight vertical line to a series RC arrangement, and vice versa in the case of C plot. The prominently blocking behavior of the 11-MUA monolayer is evidenced by the semicircle observed in the C plots in the medium-to-high frequency range, both in the presence of the redox couple and in its absence.…”

Section: Xps Analysismentioning

confidence: 99%

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Structural, Electrochemical, and Photophysical Properties of a Molecular Shuttle Attached to an Acid-Terminated Self-Assembled Monolayer

Cecchet¹,

Rudolf²,

Rapino³

et al. 2004

J. Phys. Chem. B

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Structural, electrochemical, and photophysical properties of a molecular shuttle attached to an acid-terminated self-assembled monolayer Cecchet, F; Rudolf, Petra; Rapino, S; Margotti, M; Paolucci, F; Baggerman, J; Kay, ER; Wong, JKY; Leigh, DA; Kay, Euan R. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. March 30, 2004; In Final Form: July 6, 2004 A benzylic amide macrocycle containing a pyridine moiety (macrocycle 2) and a related benzylic amide macrocycle-based molecular shuttle (naphthalimide rotaxane) with two pyridine moieties on the macrocyclic unit were grafted onto a self-assembled monolayer (SAM) of 11-mercaptoundecanoic acid (11-MUA) on gold. X-ray photoelectron spectroscopy (XPS) indicates that the molecules are linked to the SAM by hydrogenbonding. Electrochemical investigations show that the self-assembled monolayer is densely packed and well ordered and allows the estimation of the average thickness of the SAM alone and of the SAM functionalized with either macrocycle 2 or with naphthalimide rotaxane. The estimated thickness values suggest that the 11-MUA chains in the SAM are tilted with respect to the surface normal, as expected for ordered and stable SAMs, whereas the rotaxane molecules are oriented with the thread parallel to the SAM surface and macrocycle plan preferentially perpendicular to the surface. The photophysical studies of the naphthalimide rotaxane grafted onto the SAM on gold demonstrated that fluorescence is partially quenched but still remains easily measurable because the presence of the SAM reduces the quenching effect of the metal substrate. Moreover, the photophysical analysis clearly indicates that the naphthalimide part of the rotaxane strongly interacts with the carboxylic groups of the SAM, in agreement with the orientation of the molecule obtained from the electrochemistry.

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Section: Xps Analysismentioning

confidence: 99%

Section: Xps Analysismentioning

confidence: 99%

Section: Xps Analysismentioning

confidence: 99%

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Structural, Electrochemical, and Photophysical Properties of a Molecular Shuttle Attached to an Acid-Terminated Self-Assembled Monolayer

Cecchet¹,

Rudolf²,

Rapino³

et al. 2004

J. Phys. Chem. B

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“…[1][2][3][4][5] SAM functionalization provides a powerful, yet simple way to manipulate the chemical, electrical and optical properties of surfaces, with the ability to tune the material's macroscopic properties. 6 This is the case for dye-sensitized solar cells (DSCs) where a SAM of dye molecules sensitizes a semiconductor in order to harvest light.…”

Section: Introductionmentioning

confidence: 99%

In Situ Mapping of the Molecular Arrangement of Amphiphilic Dye Molecules at the TiO₂ Surface of Dye-Sensitized Solar Cells

Voïtchovsky

Astani

Tavernelli

et al. 2015

ACS Appl. Mater. Interfaces

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Citation for published item:o¤ %t hovskyD uF nd esh ri est niD xF nd vernelliD sF nd etre ultD xF nd othlis ergerD F nd tell iD pF nd qr¤ tzelD wF nd erne r rmsD rF @PHISA 9snEsitu m pping of the mole ul r rr ngement of mphiphili dye mole ules t the iyP surf e of dye sensitized sol r ellsF9D eg pplied m teri ls interf esFD U @PHAF ppF IHVQREIHVRPF Further information on publisher's website: httpXGGdxFdoiForgGIHFIHPIG s miFS HITQV Publisher's copyright statement: This document is the Accepted Manuscript version of a Published Work that appeared in nal form in ACS applied materials interfaces, copyright c 2015 American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see http://dx.doi.org/10.1021/acsami.5b01638. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Just Accepted "Just Accepted" manuscripts have been peer-reviewed and accepted for publication. They are posted online prior to technical editing, formatting for publication and author proofing. The American Chemical Society provides "Just Accepted" as a free service to the research community to expedite the dissemination of scientific material as soon as possible after acceptance. "Just Accepted" manuscripts appear in full in PDF format accompanied by an HTML abstract. "Just Accepted" manuscripts have been fully peer reviewed, but should not be considered the official version of record. They are accessible to all readers and citable by the Digital Object Identifier (DOI®). "Just Accepted" is an optional service offered to authors. Therefore, the "Just Accepted" Web site may not include all articles that will be published in the journal. After a manuscript is technically edited and formatted, it will be removed from the "Just Accepted" Web site and published as an ASAP article. Note that technical editing may introduce minor changes to the manuscript text and/or graphics which could affect content, and all legal disclaimers and ethical guidelines that apply to the journal pertain. ACS cannot be held responsible for errors or consequences arising from the use of information contained in these "Just Accepted" manuscripts. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59

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“…22 The electrochemical properties of the 1-functionalized SAMs were then investigated by EIS, a technique that has been widely used to determine the size and number of defects in a SAM, and to estimate the average thickness of an organic layer from the evaluation of the double-layer capacitance of the modified interface. 21,23 Although in cyclic voltammetry (CV) large potential sweeps (on the order of 0.1 -1 V) are applied to the electrode/solution interface and the resulting dc current is measured, in EIS the interface is usually kept at its rest potential and probed by using a small-amplitude (typically e20 mV) Figure 4 shows the impedance spectra of the physisorbed 1 and the chemisorbed 1 on the SAM/gold electrode in both the absence and, in the latter case, presence of a redox probe (1 mM [Fe(CN) 6 ] 3-/4-) in solution. We present the complex capacitance C (c-plot), defined as 1/jωZ, where Z is the interface (complex) impedance, a parametric function of the frequency f, j ) -1, and ω is the angular frequency ()2πf).…”

Section: Resultsmentioning

confidence: 99%

Electrode Surface Modification by a Spirobifluorene Derivative. An XPS and Electrochemical Investigation

et al. 2005

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Ordered thin layers of a spirobifluorene derivative containing an amino group were formed by grafting them onto a self-assembled monolayer (SAM) of 11-mercaptoundecanoic acid (11-MUA) on gold. Either physical (H-bonding) or chemical bonding (activated by EDCl) was investigated. X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy confirmed that both methods can be used to effectively graft 2-amino-9,9‘-spirobifluorene molecules onto the SAM surface, giving high surface coverages, with a significantly higher packing in the case of chemisorbed films. EIS measurements also showed that the covalently bonded spirobifluorene SAMs act as an effective barrier to both ion penetration and heterogeneous electron transfer.

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Sensor Functionalities in Self-Assembled Monolayers

Cited by 386 publications

References 58 publications

Structural, Electrochemical, and Photophysical Properties of a Molecular Shuttle Attached to an Acid-Terminated Self-Assembled Monolayer

Structural, Electrochemical, and Photophysical Properties of a Molecular Shuttle Attached to an Acid-Terminated Self-Assembled Monolayer

In Situ Mapping of the Molecular Arrangement of Amphiphilic Dye Molecules at the TiO₂ Surface of Dye-Sensitized Solar Cells

Electrode Surface Modification by a Spirobifluorene Derivative. An XPS and Electrochemical Investigation

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Sensor Functionalities in Self-Assembled Monolayers

Cited by 386 publications

References 58 publications

Structural, Electrochemical, and Photophysical Properties of a Molecular Shuttle Attached to an Acid-Terminated Self-Assembled Monolayer

Structural, Electrochemical, and Photophysical Properties of a Molecular Shuttle Attached to an Acid-Terminated Self-Assembled Monolayer

In Situ Mapping of the Molecular Arrangement of Amphiphilic Dye Molecules at the TiO2 Surface of Dye-Sensitized Solar Cells

Electrode Surface Modification by a Spirobifluorene Derivative. An XPS and Electrochemical Investigation

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In Situ Mapping of the Molecular Arrangement of Amphiphilic Dye Molecules at the TiO₂ Surface of Dye-Sensitized Solar Cells