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Mao Z, Wu Y, Ma XY, Zheng L, Zhang XG, Cai WB. In Situ Wide-Frequency Surface-Enhanced Infrared Absorption Spectroscopy Enables One to Decipher the Interfacial Structure of a Cu Plating Additive. J Phys Chem Lett 2022; 13:9079-9084. [PMID: 36154129 DOI: 10.1021/acs.jpclett.2c02541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In situ spectroscopic characterization of the interfacial structure of an organic additive at a Cu electrode is essential for a mechanistic understanding of Cu superfilling at the molecular level. In this work, we demonstrate wide-frequency attenuated total reflection surface-enhanced infrared absorption spectroscopy (wf-ATR-SEIRAS) to elucidate the dissociative adsorption of bis(sodium sulfopropyl)-disulfide (a typical accelerator) on a Cu electrode in conjunction with the electrochemical quartz crystal microbalance measurement and modeling calculations. The wf-ATR-SEIRAS clearly identifies the peaks featuring the sulfonate and methylene groups as well as the C-Ssulfonate and C-Sthiol vibrations of the adsorbate. Analysis of relative peak intensities from 1100 to 650 cm-1 reveals a more tilted alkyl chain axis for the thiolate on Cu than that on Au, which is supported by comparative density functional theory calculations. This work opens a new avenue for the wf-ATR-SEIRAS to study interfacial structures of electroplating additives related to advanced microelectronics manufacture.
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Affiliation(s)
- Zijie Mao
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Yicai Wu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Xian-Yin Ma
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200438, China
| | - Li Zheng
- Huawei Technologies Co., Ltd., Shenzhen 518129, China
| | - Xia-Guang Zhang
- Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, College of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
| | - Wen-Bin Cai
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200438, China
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2
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Alt M, Schinke J, Hillebrandt S, Hänsel M, Hernandez-Sosa G, Mechau N, Glaser T, Mankel E, Hamburger M, Deing K, Jaegermann W, Pucci A, Kowalsky W, Lemmer U, Lovrincic R. Processing follows function: pushing the formation of self-assembled monolayers to high-throughput compatible time scales. ACS APPLIED MATERIALS & INTERFACES 2014; 6:20234-20241. [PMID: 25323064 DOI: 10.1021/am5057689] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Self-assembled monolayers (SAMs) of organic molecules can be used to tune interface energetics and thereby improve charge carrier injection at metal-semiconductor contacts. We investigate the compatibility of SAM formation with high-throughput processing techniques. Therefore, we examine the quality of SAMs, in terms of work function shift and chemical composition as measured with photoelectron and infrared spectroscopy and in dependency on molecular exposure during SAM formation. The functionality of the SAMs is determined by the performance increase of organic field-effect transistors upon SAM treatment of the source/drain contacts. This combined analytical and device-based approach enables us to minimize the necessary formation times via an optimization of the deposition conditions. Our findings demonstrate that SAMs composed of partially fluorinated alkanethiols can be prepared in ambient atmosphere from ethanol solution using immersion times as short as 5 s and still exhibit almost full charge injection functionality if process parameters are chosen carefully. This renders solution-processed SAMs compatible with high-throughput solution-based deposition techniques.
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Affiliation(s)
- Milan Alt
- Light Technology Institute, Karlsruhe Institute of Technology , Engesserstrasse 13, 76131 Karlsruhe, Germany
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Kokoschka M, Henry JB, Bandarenka AS. Multiparametric characterization of nonelectroactive self-assembled monolayers during their formation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9909-9917. [PMID: 23845034 DOI: 10.1021/la400749m] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The formation of nonelectroactive self-assembled monolayers (SAMs) at the electrode/electrolyte interface was characterized with simultaneous impedance, gravimetric, and direct current measurements. In the presence of specifically adsorbing inorganic ions, this provides key information about the formation of SAMs. Gravimetric measurements allow an estimation of the adsorbate surface coverage; and completion of the assembly process can then be monitored in real-time. Electrochemical impedance spectroscopy measurements play a multifunctional role: they enable elucidation of the physical models of the interface, provide the information about the effective capacitance of SAMs thus probing the dielectric properties of the adsorbed layers, and evaluate the ability of charged electrolyte components to approach the electrode surface through the SAM (using adsorbing/desorbing SO4(2-) as an electroactive probe). The latter is important to assess the extent of defects in the formed organic layers. Finally, monitoring the direct current during SAM formation together with the collected gravimetric data can give additional important information about the process. A series of n-mercaptoalcohols with different hydrocarbon chain length adsorbing at Au electrodes was used as the model object to evaluate the proposed approach.
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Affiliation(s)
- Malte Kokoschka
- Institute of Organic Chemistry and Biochemistry and Gilead Sciences Research Center, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 166 10 Prague, Czech Republic
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Matharu Z, Bandodkar AJ, Gupta V, Malhotra BD. Fundamentals and application of ordered molecular assemblies to affinity biosensing. Chem Soc Rev 2012; 41:1363-402. [DOI: 10.1039/c1cs15145b] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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5
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Li Z, Niu T, Zhang Z, Bi S. Potential control characteristics of short-chain thiols of thioctic acid and mercaptohexanol self-assembled on gold. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.05.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Preparation and micro-mechanical studies of polysiloxane-containing dual-layer film on Au surface. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2009.05.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Uosaki K. Electrochemical oxidative formation of ordered monolayers of thiol molecules on Au(111) surface. CHEM REC 2009; 9:199-209. [DOI: 10.1002/tcr.200900002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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8
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Bertoncello P, Kefalas ET, Pikramenou Z, Unwin PR, Forster RJ. Adsorption Dynamics and Electrochemical and Photophysical Properties of Thiolated Ruthenium 2,2‘-Bipyridine Monolayers. J Phys Chem B 2006; 110:10063-9. [PMID: 16706466 DOI: 10.1021/jp057276j] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A new complex [Ru(bpy)(2)(bpySH)](PF(6))(2), RuBpySH, has been prepared bearing two anchoring groups for surface attachment, where bpy is 2,2'-bipyridyl and bpySH is 5,5'-bis(mercaptomethyl)-2,2'-bipyridine. Monolayers of RuBpySH have been formed on micro and macro platinum electrodes by spontaneous adsorption from micromolar solutions of the complex in 50:50 v/v water/acetone. The monolayers can be reversibly switched between the Ru(2+) and the Ru(3+) forms. Cyclic voltammetry is well-defined with a peak-to-peak splitting of 30 +/- 5 mV and a full width at half-maximum of 110 +/- 10 mV being observed for scan rates up to 5 V s(-1) where the supporting electrolyte is 0.1 M tetrabutylammonium tetrafluoroborate in acetonitrile. Adsorption is irreversible in this system, and the saturation coverage obtained is 8.1 +/- 0.4 x 10(-11) mol cm(-2) when the complex concentration in the deposition solution is between 10 microM and 1.0 mM. The dynamics of adsorption depend markedly on the bulk concentration and are described in terms of irreversible adsorption. Dry monolayers display luminescence properties similar to those of powder samples of the complex, indicating that the monolayer has characteristics of the solid-state sample rather than the solution sample of the complex. Significantly, efficient electrochemiluminescence is generated using tripropylamine as the coreactant. The rate of electron transfer across the electrode/monolayer interface has been probed using high scan rate cyclic voltammetry. The standard heterogeneous electron-transfer rate constant, k degrees , is 0.9 +/- 0.1 x 10(4) s(-1), and there is weak adsorbate-electrode electronic communication.
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Senaratne W, Takada K, Das R, Cohen J, Baird B, Abruña HD, Ober CK. Dinitrophenyl ligand substrates and their application to immunosensors. Biosens Bioelectron 2006; 22:63-70. [PMID: 16414258 DOI: 10.1016/j.bios.2005.12.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2005] [Revised: 11/14/2005] [Accepted: 12/05/2005] [Indexed: 11/17/2022]
Abstract
We present an approach for the development of highly specific and sensitive antibody based biosensors by chemically tailoring the sensor surface with materials that control specific and nonspecific binding of biologically relevant molecules. As a model system we employed surface immobilized 2,4-dinitrophenyl (DNP)-ligands that bind specifically to anti-DNP antibodies. Self-assembling characteristics and minimization of the nonspecific interactions were used in the ligand design. The redox activity of the DNP-head group was used to calculate the surface density (coverage) of these assemblies using cyclic voltammetry. Quartz crystal microbalance (QCM) and impedance analysis were used to assess the ligand-antibody interaction and estimate the quantity of antibodies bound to the surface. The ligand surface density and the QCM data were useful in determining the sensitivity of our model system. A simple two-step kinetic model was shown to fit the experimental data.
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Affiliation(s)
- Wageesha Senaratne
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA
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10
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Cao Z, Xiao Z, Gu N, Gong F, Yang D, Zhu Z. Corrosion Behaviors on Polycrystalline Gold Substrates in Self‐Assembled Processes of Alkanethiol Monolayers. ANAL LETT 2005. [DOI: 10.1081/al-200060960] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Wano H, Uosaki K. In Situ dynamic monitoring of electrochemical oxidative adsorption and reductive desorption processes of a self-assembled monolayer of hexanethiol on a Au(111) surface in KOH ethanol solution by scanning tunneling microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:4024-4033. [PMID: 15835970 DOI: 10.1021/la050209w] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Electrochemical oxidative formation and reductive desorption processes of a self-assembled monolayer (SAM) of hexanethiol on a Au(111) surface in KOH ethanol solutions containing various concentrations of hexanethiol were investigated by in situ scanning tunneling microscopy in real time. The generation and disappearance of vacancy islands (VIs), corresponding to the formation and desorption of the SAM, respectively, were observed as anodic and cathodic current, respectively, flowed when the thiol concentration was higher than ca. 1 microM. When the VIs disappeared after the reductive desorption of the SAMs, the herringbone structure corresponding to the (radical3 x 23) structure of Au(111), was observed on the surface, indicating that a clean reconstructed surface was exposed even in the hexanethiol ethanol solution. During both oxidative adsorption and reductive desorption of the SAMs, the shape of the steps of the gold substrate changed drastically and the step lines became parallel to the 121 direction of the Au(111) surface, suggesting that gold atoms on the surface were extremely mobile during these processes. The coalescence of adjacent vacancy islands and growth of larger islands triangular in shape accompanied with the disappearance of nearby smaller islands were observed, confirming that the VIs grew according to the Ostward ripening model.
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Affiliation(s)
- Hiromi Wano
- Physical Chemistry Laboratory, Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan
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12
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Hedström M, Galaev IY, Mattiasson B. Continuous measurements of a binding reaction using a capacitive biosensor. Biosens Bioelectron 2004; 21:41-8. [PMID: 15967349 DOI: 10.1016/j.bios.2004.10.014] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2004] [Revised: 10/11/2004] [Accepted: 10/14/2004] [Indexed: 11/25/2022]
Abstract
A capacitive biosensor with polyclonal antibodies raised against human serum albumin (HSA) immobilized on a gold transducer has been developed for continuous measurement of HSA in the muM-range. A mathematical model has been refined to describe integral HSA-binding curves assuming that (i) binding is essentially irreversible under the conditions used, (ii) the signal is scaled as the number of non-occupied binding sites and (iii) the rate of disappearance of available binding sites is scaled as the number of available binding sites and analyte concentration in solution. Deconvolution of the curves using the mathematical model indicates clearly that it is possible to retrieve concentration profiles (isocratic, linearly or exponentially increasing gradients) of the analyte in the continuous sample flow from the normalized integral binding (NIB) curves. The data presented constitutes the theoretical background and the first step towards the development of an analytical system allowing on-line detection of the concentration profile of the analyte from NIB-curves. Since the system can be used for extended time periods between regeneration steps, a low frequency of regeneration steps can be expected.
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Affiliation(s)
- Martin Hedström
- Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
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13
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Takada K, Abruña HD. Determination of solvation numbers of [RuII(bpy)3] and [RuII(tpy)2] functionalized-PAMAM dendrimers adsorbed onto platinum electrode surfaces. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2003.12.034] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Sumi T, Uosaki K. Electrochemical Oxidative Formation and Reductive Desorption of a Self-Assembled Monolayer of Decanethiol on a Au(111) Surface in KOH Ethanol Solution. J Phys Chem B 2004; 108:6422-8. [DOI: 10.1021/jp049558+] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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The effect of concentration on the oxidative deposition of a monolayer of alkylthiolate on gold: from island formation to random adsorption. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2003.10.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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16
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A study of the hydrophobic properties of alkanethiol self-assembled monolayers prepared in different solvents. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2003.10.035] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Jin Y, Dong S. Probing UPD-Induced Surface Atomic Rearrangement of Polycrystalline Gold Nanofilms with Surface Plasmon Resonance Spectroscopy and Cyclic Voltammetry. J Phys Chem B 2003. [DOI: 10.1021/jp035851i] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yongdong Jin
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
| | - Shaojun Dong
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
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18
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Sur UK, Subramanian R, Lakshminarayanan V. Cyclic voltammetric and electrochemical impedance studies on the structure, adsorption kinetics, and barrier properties of some organic dithiol self-assembled monolayers on gold. J Colloid Interface Sci 2003; 266:175-82. [PMID: 12957597 DOI: 10.1016/s0021-9797(03)00568-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have studied the orientation and barrier properties of self-assembled monolayers (SAMs) of two alkanedithiols, hexanedithiol, octanedithiol, and an aromatic dithiol, 1,4-benzene dimethanethiol (BDMT), on gold in acetonitrile. From our studies, we conclude that BDMT molecules can form more organized monolayers on gold than aliphatic dithiol SAMs due to extremely strong lateral van der Waals interaction among the phenyl rings in the former. A study of the adsorption kinetics of octanedithiol in ethanol indicates that the adsorption rate law is concentration dependent just as for alkanethiols. However, the rate of adsorption is considerably faster than for simple alkanethiols.
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Electrochemical oxidative adsorption and reductive desorption of a self-assembled monolayer of decanethiol on the Au(111) surface in KOH+ethanol solution. J Electroanal Chem (Lausanne) 2003. [DOI: 10.1016/s0022-0728(03)00141-4] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Studies on Self-Assembled Alkanethiol Monolayers Formed at Applied Potential on Polycrystalline Gold Electrodes. ELECTROANAL 2003. [DOI: 10.1002/elan.200390069] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Sur UK, Lakshminarayanan V. Existence of a hydrophobic gap at the alkanethiol SAM-water interface: an interfacial capacitance study. J Colloid Interface Sci 2002; 254:410-3. [PMID: 12702416 DOI: 10.1006/jcis.2002.8653] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The highly hydrophobic neat alkanethiol-coated SAM on evaporated gold shows an unusually low interfacial capacitance in aqueous media. This result cannot be explained by a simple parallel plate model of the double layer with the alkanethiol monolayer as a sole dielectric separator. Interestingly, a hydrophilic SAM prepared from a neat hydroxy thiol does not show any such capacitance lowering in aqueous media. Our results suggest the existence of a "hydrophobic gap" between the alkanethiol SAM-water interface. Such a model is also very much consistent with the predictions of Lum, Chandler, and Weeks theory of length scale dependent hydrophobicity.
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22
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Qu D, Morin M. The kinetics of the electroformation of a self-assembled monolayer of butanethiols on gold. J Electroanal Chem (Lausanne) 2002. [DOI: 10.1016/s0022-0728(02)00732-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Qu D, Morin M. An EQCM study of the oxidative deposition of alkylthiolates on gold. J Electroanal Chem (Lausanne) 2001. [DOI: 10.1016/s0022-0728(01)00662-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
Recent applications of various in situ techniques have dramatically improved our understanding of the self-organization process of adsorbed molecular monolayers on solid surfaces. The process involves several steps, starting with bulk solution transport and surface adsorption and continuing with the two-dimensional organization on the substrate of interest. This later process can involve passage through one or more intermediate surface phases and can often be described using two-dimensional nucleation and growth models. A rich picture has emerged that combines elements of surfactant adsorption at interfaces and epitaxial growth with the additional complication of long-chain molecules with many degrees of freedom.
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Affiliation(s)
- D K Schwartz
- Department of Chemical Engineering, University of Colorado, Boulder, Colorado 80309, USA.
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25
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Subramanian R, Lakshminarayanan V. A study of kinetics of adsorption of alkanethiols on gold using electrochemical impedance spectroscopy. Electrochim Acta 2000. [DOI: 10.1016/s0013-4686(00)00512-0] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Electrochemical pretreatment of polycrystalline gold electrodes to produce a reproducible surface roughness for self-assembly: a study in phosphate buffer pH 7.4. Anal Chem 2000; 72:2016-21. [PMID: 10815959 DOI: 10.1021/ac991215y] [Citation(s) in RCA: 174] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
It has been emphasized in several studies that the state of the surface, including the surface roughness, is very important for the reproducible formation of high-quality self-assembled monolayers on gold. The pulsed-potential pretreatment procedure described in this paper can, in a reproducible way, reduce the surface roughness of mechanically polished polycrystalline gold electrodes by a factor 2. The developed procedure, in which the gold is alternately oxidized and reduced, has been optimized for use in a flow system (100 mM phosphate buffer pH 7.4). The influence of the pretreatment procedure on the surface roughness of the electrodes has been studied by in-situ oxygen adsorption measurements using cyclic voltammetry. The most effective pulse regime in producing a gold surface with a reproducible and relatively low surface roughness is a triple-potential pulse waveform, with potentials of +1.6, 0.0, and -0.8 Vvs SCE and pulse widths of 100 ms for each potential. Prolonged pulsing for 2000-5000 s with the gold working electrode in a flow-through cell showed an electropolishing effect, i.e., a decrease of the roughness in time. Flow conditions are very important: the roughness decreased faster at higher flow rates, while an increase was observed without flow. A process of reconstruction and dissolution of gold during application of the potential pulses under flow conditions is assumed to account for the observed phenomena. A self-assembled monolayer of thioctic acid with reproducible characteristics, determined with impedance measurements, could be formed on a pretreated gold surface.
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Etchenique R, Furman M, Olabe JA. Photodelivery of Nitric Oxide from a Nitrosothiol-Derivatized Surface. J Am Chem Soc 2000. [DOI: 10.1021/ja9939845] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Roberto Etchenique
- Departamento de Química Inorgánica Analítica y Química Física, INQUIMAE Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Ciudad Universitaria Pabellón 2, CP 1428 Buenos Aires, República Argentina
| | - Melina Furman
- Departamento de Química Inorgánica Analítica y Química Física, INQUIMAE Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Ciudad Universitaria Pabellón 2, CP 1428 Buenos Aires, República Argentina
| | - José A. Olabe
- Departamento de Química Inorgánica Analítica y Química Física, INQUIMAE Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Ciudad Universitaria Pabellón 2, CP 1428 Buenos Aires, República Argentina
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Sato Y, Mizutani F, Shimazu K, Ye S, Uosaki K. Mass transport accompanied with electron transfer between the gold electrode modified with 11-ferrocenylundecanethiol monolayer and redox species in solution — an electrochemical quartz crystal microbalance study. J Electroanal Chem (Lausanne) 1999. [DOI: 10.1016/s0022-0728(99)00305-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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29
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Kondoh H, Kodama C, Sumida H, Nozoye H. Molecular processes of adsorption and desorption of alkanethiol monolayers on Au(111). J Chem Phys 1999. [DOI: 10.1063/1.479302] [Citation(s) in RCA: 179] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Dannenberger O, Buck M, Grunze M. Self-Assembly of n-Alkanethiols: A Kinetic Study by Second Harmonic Generation. J Phys Chem B 1999. [DOI: 10.1021/jp983433l] [Citation(s) in RCA: 179] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- O. Dannenberger
- Lehrstuhl für Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - M. Buck
- Lehrstuhl für Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - M. Grunze
- Lehrstuhl für Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
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31
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Xu S, Cruchon-Dupeyrat SJN, Garno JC, Liu GY, Kane Jennings G, Yong TH, Laibinis PE. In situ studies of thiol self-assembly on gold from solution using atomic force microscopy. J Chem Phys 1998. [DOI: 10.1063/1.475908] [Citation(s) in RCA: 157] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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32
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33
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Grundmeier G, Reinartz C, Rohwerder M, Stratmann M. Corrosion properties of chemically modified metal surfaces. Electrochim Acta 1998. [DOI: 10.1016/s0013-4686(97)00221-1] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sato Y, Mizutani F, Shimazu K, Ye S, Uosaki K. Mass transport accompanied with electron transfer between the gold electrode modified with 11-ferrocenylundecanethiol monolayer and redox species in solution — an electrochemical quartz crystal microbalance study. J Electroanal Chem (Lausanne) 1997. [DOI: 10.1016/s0022-0728(97)00121-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sastry M, Patil V, Mayya KS. Selective Binding of Divalent Cations at the Surface of Self-Assembled Monolayers of an Aromatic Bifunctional Molecule Studied on a Quartz Crystal Microbalance. J Phys Chem B 1997. [DOI: 10.1021/jp962630m] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Murali Sastry
- Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India
| | - Vijaya Patil
- Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India
| | - K. S. Mayya
- Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India
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General Discussion. Faraday Discuss 1997. [DOI: 10.1039/fd107445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Takada K, Abruña HD. In Situ Quartz Crystal Microbalance Study of Self-Assembly and Mass Transfer Processes of a Redox-Active Osmium Complex. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp961871r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kazutake Takada
- Department of Chemistry, Baker Laboratory, Cornell University, Ithaca, New York, 14853-1301
| | - Héctor D. Abruña
- Department of Chemistry, Baker Laboratory, Cornell University, Ithaca, New York, 14853-1301
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Anderson JL, Bowden EF, Pickup PG. Dynamic Electrochemistry: Methodology and Application. Anal Chem 1996. [DOI: 10.1021/a1960015y] [Citation(s) in RCA: 82] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- James L. Anderson
- Department of Chemistry, University of Georgia, Athens, Georgia 30602
| | - Edmond F. Bowden
- Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695
| | - Peter G. Pickup
- Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1B 3X7
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