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George M. Whitesides - One of the best experts on this subject based on the ideXlab platform.
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Formation of Self-Assembled Monolayers by Chemisorption of Derivatives of Oligo(Ethylene glycol) of Structure HS(CH2)11(OCH2CH2)mOH on Gold
Journal of the American Chemical Society, 1991Co-Authors: Catherine Pale-grosdemange, Kevin L. Prime, Ethan S. Simon, George M. WhitesidesAbstract:This paper describes the preparation of oligo(Ethylene glycol)-terminated alkanethiols having structure HS-(CH2)11(OCH2CH)m(OH) (m = 3-7) and their use in their use in the formation of self-assembled monolayers (SAMs) on gold. A combination of experimental evidence derived from X-ray photoelectron spectroscopy (XPS), measurement of contact angles, and ellipsometry implies substantial disorder in the oligo(Ethylene glycol)-containing segment. The order in the -(CH2)11-group is not defined by the available evidence. The SAMs are moderately hydrophilic: theta-a(H2O) = 34-38-degrees; theta-r(H2O) = 22-25-degrees. A study of monolayers containing mixtures of HS(CH2)11CH3 and HS(CH2)11(OCH2CH2)6OH suggests that the oligo(Ethylene glycol) moieties are effective at preventing underlying mEthylene groups from influencing wetting by water. A limited study demonstrates that these oligo(Ethylene glycol)-containing SAMs resist that adsorption of protein from solution and suggests that SAMS will be a useful model system model for studying the adsorption of proteins onto organic surfaces.
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formation of self assembled monolayers by chemisorption of derivatives of oligo Ethylene glycol of structure hs ch2 11 och2ch2 moh on gold
Journal of the American Chemical Society, 1991Co-Authors: Catherine Palegrosdemange, Kevin L. Prime, Ethan S. Simon, George M. WhitesidesAbstract:This paper describes the preparation of oligo(Ethylene glycol)-terminated alkanethiols having structure HS- (CHz)'l(OCH2CHz),nOH (m = 3-7) and their use in the formation of self-assembled monolayers (SAMs) on gold. A combination of experimental evidence derived from X-ray photoelectron sp€ctroscopy (XPS), measurement of contact angles, and ellipsometry implies substantial disorder in the oligo(Ethylene glycol)-containing segment. The order in the -(CHz)r- group is not defined by the available evidence. The SAMs are moderately hydrophilic: du(H2O) = 34-38o; d,(H2O) = 22-25". A study of monolayers containing mixtures of HS(CH2)rrCHr and HS(CH2)rr(OCH2CH 2)6OH suggests that the oligo(Ethylene glycol) moieties are eflective at preventing underlying mEthylene groups from influencing wetting by water. A limited study demonstrates that these oligo(Ethylene glycol)-containing SAMs resist the adsorption of protein from solution and suggests that SAMs will be a useful model system for studying the adsorption of proteins onto organic surfaces.
Ethan S. Simon - One of the best experts on this subject based on the ideXlab platform.
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Formation of Self-Assembled Monolayers by Chemisorption of Derivatives of Oligo(Ethylene glycol) of Structure HS(CH2)11(OCH2CH2)mOH on Gold
Journal of the American Chemical Society, 1991Co-Authors: Catherine Pale-grosdemange, Kevin L. Prime, Ethan S. Simon, George M. WhitesidesAbstract:This paper describes the preparation of oligo(Ethylene glycol)-terminated alkanethiols having structure HS-(CH2)11(OCH2CH)m(OH) (m = 3-7) and their use in their use in the formation of self-assembled monolayers (SAMs) on gold. A combination of experimental evidence derived from X-ray photoelectron spectroscopy (XPS), measurement of contact angles, and ellipsometry implies substantial disorder in the oligo(Ethylene glycol)-containing segment. The order in the -(CH2)11-group is not defined by the available evidence. The SAMs are moderately hydrophilic: theta-a(H2O) = 34-38-degrees; theta-r(H2O) = 22-25-degrees. A study of monolayers containing mixtures of HS(CH2)11CH3 and HS(CH2)11(OCH2CH2)6OH suggests that the oligo(Ethylene glycol) moieties are effective at preventing underlying mEthylene groups from influencing wetting by water. A limited study demonstrates that these oligo(Ethylene glycol)-containing SAMs resist that adsorption of protein from solution and suggests that SAMS will be a useful model system model for studying the adsorption of proteins onto organic surfaces.
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formation of self assembled monolayers by chemisorption of derivatives of oligo Ethylene glycol of structure hs ch2 11 och2ch2 moh on gold
Journal of the American Chemical Society, 1991Co-Authors: Catherine Palegrosdemange, Kevin L. Prime, Ethan S. Simon, George M. WhitesidesAbstract:This paper describes the preparation of oligo(Ethylene glycol)-terminated alkanethiols having structure HS- (CHz)'l(OCH2CHz),nOH (m = 3-7) and their use in the formation of self-assembled monolayers (SAMs) on gold. A combination of experimental evidence derived from X-ray photoelectron sp€ctroscopy (XPS), measurement of contact angles, and ellipsometry implies substantial disorder in the oligo(Ethylene glycol)-containing segment. The order in the -(CHz)r- group is not defined by the available evidence. The SAMs are moderately hydrophilic: du(H2O) = 34-38o; d,(H2O) = 22-25". A study of monolayers containing mixtures of HS(CH2)rrCHr and HS(CH2)rr(OCH2CH 2)6OH suggests that the oligo(Ethylene glycol) moieties are eflective at preventing underlying mEthylene groups from influencing wetting by water. A limited study demonstrates that these oligo(Ethylene glycol)-containing SAMs resist the adsorption of protein from solution and suggests that SAMs will be a useful model system for studying the adsorption of proteins onto organic surfaces.
Kevin L. Prime - One of the best experts on this subject based on the ideXlab platform.
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Formation of Self-Assembled Monolayers by Chemisorption of Derivatives of Oligo(Ethylene glycol) of Structure HS(CH2)11(OCH2CH2)mOH on Gold
Journal of the American Chemical Society, 1991Co-Authors: Catherine Pale-grosdemange, Kevin L. Prime, Ethan S. Simon, George M. WhitesidesAbstract:This paper describes the preparation of oligo(Ethylene glycol)-terminated alkanethiols having structure HS-(CH2)11(OCH2CH)m(OH) (m = 3-7) and their use in their use in the formation of self-assembled monolayers (SAMs) on gold. A combination of experimental evidence derived from X-ray photoelectron spectroscopy (XPS), measurement of contact angles, and ellipsometry implies substantial disorder in the oligo(Ethylene glycol)-containing segment. The order in the -(CH2)11-group is not defined by the available evidence. The SAMs are moderately hydrophilic: theta-a(H2O) = 34-38-degrees; theta-r(H2O) = 22-25-degrees. A study of monolayers containing mixtures of HS(CH2)11CH3 and HS(CH2)11(OCH2CH2)6OH suggests that the oligo(Ethylene glycol) moieties are effective at preventing underlying mEthylene groups from influencing wetting by water. A limited study demonstrates that these oligo(Ethylene glycol)-containing SAMs resist that adsorption of protein from solution and suggests that SAMS will be a useful model system model for studying the adsorption of proteins onto organic surfaces.
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formation of self assembled monolayers by chemisorption of derivatives of oligo Ethylene glycol of structure hs ch2 11 och2ch2 moh on gold
Journal of the American Chemical Society, 1991Co-Authors: Catherine Palegrosdemange, Kevin L. Prime, Ethan S. Simon, George M. WhitesidesAbstract:This paper describes the preparation of oligo(Ethylene glycol)-terminated alkanethiols having structure HS- (CHz)'l(OCH2CHz),nOH (m = 3-7) and their use in the formation of self-assembled monolayers (SAMs) on gold. A combination of experimental evidence derived from X-ray photoelectron sp€ctroscopy (XPS), measurement of contact angles, and ellipsometry implies substantial disorder in the oligo(Ethylene glycol)-containing segment. The order in the -(CHz)r- group is not defined by the available evidence. The SAMs are moderately hydrophilic: du(H2O) = 34-38o; d,(H2O) = 22-25". A study of monolayers containing mixtures of HS(CH2)rrCHr and HS(CH2)rr(OCH2CH 2)6OH suggests that the oligo(Ethylene glycol) moieties are eflective at preventing underlying mEthylene groups from influencing wetting by water. A limited study demonstrates that these oligo(Ethylene glycol)-containing SAMs resist the adsorption of protein from solution and suggests that SAMs will be a useful model system for studying the adsorption of proteins onto organic surfaces.
Catherine Pale-grosdemange - One of the best experts on this subject based on the ideXlab platform.
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Formation of Self-Assembled Monolayers by Chemisorption of Derivatives of Oligo(Ethylene glycol) of Structure HS(CH2)11(OCH2CH2)mOH on Gold
Journal of the American Chemical Society, 1991Co-Authors: Catherine Pale-grosdemange, Kevin L. Prime, Ethan S. Simon, George M. WhitesidesAbstract:This paper describes the preparation of oligo(Ethylene glycol)-terminated alkanethiols having structure HS-(CH2)11(OCH2CH)m(OH) (m = 3-7) and their use in their use in the formation of self-assembled monolayers (SAMs) on gold. A combination of experimental evidence derived from X-ray photoelectron spectroscopy (XPS), measurement of contact angles, and ellipsometry implies substantial disorder in the oligo(Ethylene glycol)-containing segment. The order in the -(CH2)11-group is not defined by the available evidence. The SAMs are moderately hydrophilic: theta-a(H2O) = 34-38-degrees; theta-r(H2O) = 22-25-degrees. A study of monolayers containing mixtures of HS(CH2)11CH3 and HS(CH2)11(OCH2CH2)6OH suggests that the oligo(Ethylene glycol) moieties are effective at preventing underlying mEthylene groups from influencing wetting by water. A limited study demonstrates that these oligo(Ethylene glycol)-containing SAMs resist that adsorption of protein from solution and suggests that SAMS will be a useful model system model for studying the adsorption of proteins onto organic surfaces.
Edson Anibal De Macedo - One of the best experts on this subject based on the ideXlab platform.
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AG(CH2) in PEG - salt and ucon - Salt aqueous two-phase systems
Journal of Chemical and Engineering Data, 2008Co-Authors: Sara C. Silvério, Osvaldo Rodriguez, Pedro P. Madeira, José A. Teixeira, Edson Anibal De MacedoAbstract:Three new phase diagrams for polymer-salt aqueous two-phase systems (ATPS) at 23°C are presented. Then, partition coefficients for a series of five dinitrophenylated amino acids were obtained experimentally in five polymer-salt ATPS. The ATPS were obtained combining a polymer, polyEthylene glycol (PEG) or Ucon (a random copolymer of 50 % Ethylene oxide and 50 % propylene oxide), and a salt (Na 2 SO 4 , (NH 4 ) 2 SO 4 , or Li 2 SO 4 ). The series of amino acids allowed the calculation of the free energy of transfer of a mEthylene group, which is used as a measure of the relative hydrophobicity of the equilibrium phases. Ucon-rich phases proved to have a higher affinity for mEthylene groups than PEG which suggests a more efficient biphasic separation system with lower cross-contamination. © 2008 American Chemical Society.
