New Organic Materials Suitable for Use in Chemical Sensor Arrays

Crooks, Richard M.; Ricco, Antonio J.

doi:10.1021/ar970246h

Cited by 270 publications

(167 citation statements)

References 37 publications

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“…[1][2][3][4][5][6][7][8] Notably, alkanethiols on gold surfaces can form chemisorbed SAMs with a high degree of structural order, which can be described as a hexagonal (√3 × √3)R30 o structure or a c(4 × 2) superlattice. 1,[9][10][11][12][13] Due to their reliable structural order and high stability, they are often used as a molecular template for the construction of functional nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Formation and Structure of Self-Assembled Monolayers of Octylthioacetates on Au(111) in Catalytic Tetrabutylammonium Cyanide Solution

Park¹,

Kang²,

Choi³

et al. 2009

Bulletin of the Korean Chemical Society

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The formation and structure of self-assembled monolayers (SAMs) by the adsorption of acetyl-protected octylthioacetate (OTA) on Au(111) in a catalytic tetrabutylammonium cyanide (TBACN) solution were examined by means of scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). Molecular-scale STM imaging revealed that OTA molecules on Au(111) in a pure solvent form disordered SAMs, whereas they form well-ordered SAMs showing a c(4 × 2) structure in a catalytic TBACN solution. XPS and CV measurements also revealed that OTA SAMs on Au(111) formed in a TBACN solution have a stronger chemisorbed peak in the S 2p region at 162 eV and a higher blocking effect compared to OTA SAMs formed in a pure solvent. In this study, we clearly demonstrate that TBACN can be used as an effective deprotecting reagent for obtaining well-ordered SAMs of thioacetyl-protected molecules on gold.

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Section: Introductionmentioning

confidence: 99%

Formation and Structure of Self-Assembled Monolayers of Octylthioacetates on Au(111) in Catalytic Tetrabutylammonium Cyanide Solution

Park¹,

Kang²,

Choi³

et al. 2009

Bulletin of the Korean Chemical Society

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“…Hence, there is extensive and ongoing search for organic or inorganic coatings and lubricants for the improvement of tribological properties of the Si surface [2,3]. Ultrathin organic films that can be deployed as lubricating layers are also of widespread interest because of their potential applications in corrosion passivation [4,5], lithography [6,7], chemical sensing [8], adhesion [9,10], and boundary lubrication [11][12][13][14][15]. Requirements for effective boundary lubrication are strong adhesion of the molecules to the substrate, low friction, and high resistance to wear.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin PFPE Film Systems Fabricated by Covalent Assembly: An Application to Tribology

et al. 2011

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In this study, we have employed covalent molecular assembly to fabricate robust thin film structures comprising molecular layers and have demonstrated its application in tribology. An anhydride-functionalized polymer (gantrez) was deposited over an amine-functionalized silicon surface through covalent binding and employed as an intermediate layer between derivatized silicon and perfluoropolyether (PFPE). X-ray photoelectron spectroscopy, atomic force microscopy, and ellipsometry were employed to study the interfacial chemistry, morphology, and thickness of the assembled films. The films show excellent stability and strength against sonication, which can be attributed to the covalent interlayer linkage. Such films showed wear life of [100,000 cycles in ball-ondisk sliding tests at a normal load of 0.5 N and a sliding rotation of 200 rpm at a track radius of 3.2 mm. The performance was superior compared to that of PFPE-coated self assembled monolayers used as the lubricating layer. The film systems and assembly technique can be employed as nano-lubrication in several technological applications, such as information storage devices and micro-electromechanical systems.

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“…The SAM can be tailored to have a specific thickness or to present, at the SAM/solution interface, a given physical (such as hydrophobicity or hydrophilicity) or chemical property (for example a specific chemical group able to react with or bind to another chemical entity). Supramolecular structures that might undergo redox conversions are relevant to molecular biosensors and other electronic devices of the future [4]. Examples of such systems in this diverse field of research include redox-active self-assembled monolayers (SAMs), redox-modulated recognition sensors, redox-switchable membranes etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Characterizations of 7-Ferrocenycarbonyloxy-1-heptanethiol on Gold Substrates

Rahman

Jeon

Oh³

2009

J. Sci. Res.

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The 7-ferrocenycarbonyloxy-1-heptanethiol (FcCO 2 C 7 SH) is synthesized using ferrocene carboxylic acid, 1,6-fibromohexane, and NaS, which is confirmed and separated by FT-IR, 1 H NMR, and column chromatography. The basic redox (interfacial) properties are also studied of the self-assembled monolayers (SAMs) formed with this synthesized compound on polycrystalline gold electrode by Electrochemical Quartz Crystal Microbalance (EQCM). The FcCO 2 C 7 SH on gold acts as a barrier for the electron transfer between the gold electrode and HClO 4 in solutions and as a mediator for the reduction of Fe 3+ in solution. The frequency change (interfacial mass change) on the gold electrode surface is observed during the redox of ferrocenyl groups.

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New Organic Materials Suitable for Use in Chemical Sensor Arrays

Cited by 270 publications

References 37 publications

Formation and Structure of Self-Assembled Monolayers of Octylthioacetates on Au(111) in Catalytic Tetrabutylammonium Cyanide Solution

Formation and Structure of Self-Assembled Monolayers of Octylthioacetates on Au(111) in Catalytic Tetrabutylammonium Cyanide Solution

Ultrathin PFPE Film Systems Fabricated by Covalent Assembly: An Application to Tribology

Synthesis and Electrochemical Characterizations of 7-Ferrocenycarbonyloxy-1-heptanethiol on Gold Substrates

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