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Force titration of amino group-terminated self-assembled monolayers using chemical force microscopy

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Force titration of amino group-terminated self-assembled monolayers using chemical force microscopy

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dc.contributor.author Zhang, Hua
dc.contributor.author He, Hui-Xin
dc.contributor.author Wang, J.
dc.contributor.author Mu, Tao
dc.contributor.author Liu, Zhong-Fan
dc.date.accessioned 2012-07-13T03:58:43Z
dc.date.available 2012-07-13T03:58:43Z
dc.date.copyright 1998
dc.date.issued 2012-07-13
dc.identifier.citation Zhang, H., He, H.-X., Wang, J., Mu, T., & Liu, Z.-F. (1998). Force titration of amino group-terminated self-assembled monolayers using chemical force microscopy. Applied physics A : materials science & processing, 66, S269-S271.
dc.identifier.uri http://hdl.handle.net/10220/8325
dc.description.abstract Chemical force microscopy (CFM) was used to measure the adhesion force between an Au-coated Si3N4 tip functionalized with OH groups and a silicon substrate functionalized with NH2 groups. The curve of the adhesion force as a function of the solution pH value (force titration curve) was obtained. The pK1=2 of surface NH2 groups estimated from the force titration curve is 7:4, about 3 pK units lower than the pK value of NH2 functionality in aqueous solution, and in nice agreement with the value of pK1=2 D 7:6 determined by conventional contact angle titration. The surface pK1=2 value that we obtained from the force titration or contact angle titration is the apparent surface pK value, which is expressed as the corresponding bulk solution pH value at which the functional groups at the interface are half-ionized.
dc.language.iso en
dc.relation.ispartofseries Applied physics A : materials science & processing
dc.rights © 1998 Springer. This is the author created version of a work that has been peer reviewed and accepted for publication by Applied Physics A: Materials Science & Processing, Springer. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1007/s003390051143].
dc.subject DRNTU::Science::Chemistry::Biochemistry.
dc.title Force titration of amino group-terminated self-assembled monolayers using chemical force microscopy
dc.type Journal Article
dc.contributor.school School of Materials Science and Engineering
dc.identifier.doi http://dx.doi.org/10.1007/s003390051143
dc.description.version Accepted version

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