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

0493468 - ÚFCH JH 2019 RIV US eng J - Journal Article
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
R&D Projects: 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
Institutional support: RVO:61388955 ; RVO:61388963
Keywords : synthetic small-molecule * fluorescent nanodiamonds * supramolecular assemblies * adaptive chemistry * self-organization * track * functionalization * perspectives * microscopy
OECD category: Physical chemistry
Impact factor: 13.903, year: 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.
Permanent Link: http://hdl.handle.net/11104/0286836