Proton-Gradient-Driven Oriented Motion of Nanodiamonds Grafted to Graphene by Dynamic Covalent Bonds

0493468 - ÚFCH JH 2019 RIV US eng J - Článek v odborném periodiku
Kovaříček, Petr - Cebecauer, Marek - Neburková, Jitka - Bartoň, Jan - Fridrichová, Michaela - Drogowska, Karolina - Cígler, Petr - Lehn, J.-M. - Kalbáč, Martin
Proton-Gradient-Driven Oriented Motion of Nanodiamonds Grafted to Graphene by Dynamic Covalent Bonds.
ACS Nano. Roč. 12, č. 7 (2018), s. 7141-7147. ISSN 1936-0851. E-ISSN 1936-086X
Grant CEP: GA MŠMT LL1301; GA ČR(CZ) GJ18-09055Y; GA ČR(CZ) GA16-16336S; GA MŠMT(CZ) EF16_013/0001821; GA MŠMT(CZ) LM2015073; GA MŠMT(CZ) EF16_019/0000729
Institucionální podpora: RVO:61388955 ; RVO:61388963
Klíčová slova: synthetic small-molecule * fluorescent nanodiamonds * supramolecular assemblies * adaptive chemistry * self-organization * track * functionalization * perspectives * microscopy
Obor OECD: Physical chemistry
Impakt faktor: 13.903, rok: 2018

Manipulating nanoscopic objects by external stimuli is the cornerstone of nanoscience. Here, we report the implementation of dynamic covalent chemistry in the reversible binding and directional motion of fluorescent nanodiamond particles at a functionalized graphene surface via imine linkages. The dynamic connections allow for controlling the formation and rupture of these linkages by external stimuli. By introduction of pH gradients, the nanoparticles are driven to move along the gradient due to the different rates of the imine condensation and hydrolysis in the two environments. The multivalent nature of the particle-to-surface connection ensures that particles remain attached to the surface, whereas its dynamic character allows for exchange reaction, thus leading to displacement yet bound behavior in two-dimensional space. These results open a pathway for thermodynamically controlled manipulation of objects on the nanoscale.
Trvalý link: http://hdl.handle.net/11104/0286836