Abstract
Exploiting the intrinsic acidic nature of mixed-metal soft-oxometalates (SOMs) motility is induced using bicarbonate as fuel.
Highlights
Nanomachines[1,2] play a signi cant role in today's nanotechnology as they can perform tailored tasks using energy
In this work we have reported the synthesis of soft-oxometalate (SOM) based nanomotors comprising vanadium and molybdenum oxoanions which show autonomous movement in response to a chemical fuel like that of an aqueous solution of sodium bicarbonate
We employed the relation D 1⁄4 D0(1 + kDC) where D 1⁄4 diffusion coefficient measured from hydrodynamic radii, D0 1⁄4 diffusion coefficient at zero concentration, C 1⁄4 sample concentration in mol LÀ1, kD is a complex function depending on hydrodynamic radii which predicts the repulsive electrostatic interactions among so -oxometalates (SOMs).[54]
Summary
Nanomachines[1,2] play a signi cant role in today's nanotechnology as they can perform tailored tasks using energy. Nanomotors prove to be a step towards realisation of such nanomachines.[3,4] Nanomotors may be de ned as nano scale objects which harness energy from their environment and convert it to motion and force. In nature various biological motors are present.[5] For instance, eukaryotic cells contain several powerful biomotors which convert chemical energy from hydrolysis of ATP to mechanical work.[6] Other examples of biomotors include cytoskeletal molecular motors and enzymatic motors which are involved in the processing of RNA and DNA.[7,8] Taking inspiration from these biological machines various groups across the world have started working with nano machines. In 2004–2005 the group of Sen, Mallouk and Ozin contributed further to this eld by preparing micrometre sized motors which constituted of Pt–Au and Ni–Au bimetallic rods of length 2–3 mm.[10,11] These were chemically driven micromotors and the fuel used in these cases was primarily H2O2 which catalytically decomposed to form H2O and O2
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