title: A chemo-mechanical tweezer for single-molecular characterization of soft materials.
abstract: A new atomic force microscopy (AFM)-based chemo-mechanical tweezer has been developed that can measure mechanical properties of individual macromolecules in supramolecular assembly and reveal positions of azide-containing polymers. A key feature of the new technology is the use of an AFM tip densely modified with 4-dibenzocyclooctynols (chemo-mechanical tweezer) that can react with multiple azide containing macromolecules of micelles to give triazole "clicked" compounds, which during retracting phases of AFM imaging are removed from the macromolecular assembly thereby providing a surface topographical image and positions of azide-containing polymers. The force-distance curves gave mechanical properties of removal of individual molecules from a supramolecular assembly. The new chemo-mechanical tweezer will make it possible to characterize molecular details of macromolecular assemblies thereby offering new avenues to tailor properties of such assemblies.
authors.affiliation: Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA.
authors.forename: Jun
authors.initials: J
authors.lastname: Guo
authors.forename: Guojun
authors.initials: G
authors.lastname: Chen
authors.forename: Xinghai
authors.initials: X
authors.lastname: Ning
authors.forename: Xiuru
authors.initials: X
authors.lastname: Li
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Zhou
authors.forename: Anna
authors.initials: A
authors.lastname: Jagielska
authors.forename: Bingqian
authors.initials: B
authors.lastname: Xu
authors.forename: Geert-Jan
authors.initials: GJ
authors.lastname: Boons
mesh_terms: D001386:Azides / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D011108:Polymers / Q000737:chemistry*; D014230:Triazoles / Q000737:chemistry*
chemical_list: D001386:Azides; D046911:Macromolecular Substances; D011108:Polymers; D014230:Triazoles