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Nanorods based on mesoporous silica containing iron oxide nanoparticles as catalytic nanomotors: study of motion dynamics

Nanorods based on mesoporous silica containing iron oxide nanoparticles as catalytic nanomotors: study of motion dynamics
Nanorods based on mesoporous silica containing iron oxide nanoparticles as catalytic nanomotors: study of motion dynamics

Self-propelled particles and, in particular, those based on mesoporous silica, have raised considerable interest due to their potential applications in the environmental and biomedical fields thanks to their biocompatibility, tunable surface chemistry and large porosity. Although spherical particles have been widely used to fabricate nano- and micromotors, not much attention has been paid to other geometries, such as nanorods. Here, we report the fabrication of self-propelled mesoporous silica nanorods (MSNRs) that move by the catalytic decomposition of hydrogen peroxide by a sputtered Pt layer, Fe 2O 3 nanoparticles grown within the mesopores, or the synergistic combination of both. We show that motion can occur in two distinct sub-populations characterized by two different motion dynamics, namely enhanced diffusion or directional propulsion, especially when both catalysts are used. These results open up the possibility of using MSNRs as chassis for the fabrication of self-propelled particles for the environmental or biomedical fields.

mesoporous silica, nanomotors, nanorods, porous materials, self-propulsion
2199-692X
134-140
Mestre, R.
33721a01-ab1a-4f71-8b0e-abef8afc92f3
Cadefau, N.
53ff972d-d904-40a6-90ad-eec9b139006e
Hortelão, A.C.
3aa3d066-880a-454e-b86d-40cde0823cd2
Grzelak, J.
b1c311b7-c5ed-486d-a3dc-87d387db3680
Gich, M.
187c5122-c7a1-4228-8a1e-ac6e40185ab3
Roig, A.
9a685a3c-f010-458c-993a-091804d6748e
Sánchez, S.
5d4df08d-7a66-4b5e-b4c6-89fa84d483ed
Mestre, R.
33721a01-ab1a-4f71-8b0e-abef8afc92f3
Cadefau, N.
53ff972d-d904-40a6-90ad-eec9b139006e
Hortelão, A.C.
3aa3d066-880a-454e-b86d-40cde0823cd2
Grzelak, J.
b1c311b7-c5ed-486d-a3dc-87d387db3680
Gich, M.
187c5122-c7a1-4228-8a1e-ac6e40185ab3
Roig, A.
9a685a3c-f010-458c-993a-091804d6748e
Sánchez, S.
5d4df08d-7a66-4b5e-b4c6-89fa84d483ed

Mestre, R., Cadefau, N., Hortelão, A.C., Grzelak, J., Gich, M., Roig, A. and Sánchez, S. (2021) Nanorods based on mesoporous silica containing iron oxide nanoparticles as catalytic nanomotors: study of motion dynamics. ChemNanoMat, 7 (2), 134-140. (doi:10.1002/cnma.202000557).

Record type: Article

Abstract

Self-propelled particles and, in particular, those based on mesoporous silica, have raised considerable interest due to their potential applications in the environmental and biomedical fields thanks to their biocompatibility, tunable surface chemistry and large porosity. Although spherical particles have been widely used to fabricate nano- and micromotors, not much attention has been paid to other geometries, such as nanorods. Here, we report the fabrication of self-propelled mesoporous silica nanorods (MSNRs) that move by the catalytic decomposition of hydrogen peroxide by a sputtered Pt layer, Fe 2O 3 nanoparticles grown within the mesopores, or the synergistic combination of both. We show that motion can occur in two distinct sub-populations characterized by two different motion dynamics, namely enhanced diffusion or directional propulsion, especially when both catalysts are used. These results open up the possibility of using MSNRs as chassis for the fabrication of self-propelled particles for the environmental or biomedical fields.

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More information

Accepted/In Press date: 18 November 2020
e-pub ahead of print date: 1 December 2020
Published date: 5 February 2021
Keywords: mesoporous silica, nanomotors, nanorods, porous materials, self-propulsion

Identifiers

Local EPrints ID: 449037
URI: http://eprints.soton.ac.uk/id/eprint/449037
ISSN: 2199-692X
PURE UUID: d44d584e-2fce-4e2b-9eb1-3bf3959a95b5
ORCID for R. Mestre: ORCID iD orcid.org/0000-0002-2460-4234

Catalogue record

Date deposited: 13 May 2021 16:42
Last modified: 23 Jul 2022 02:29

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Contributors

Author: R. Mestre ORCID iD
Author: N. Cadefau
Author: A.C. Hortelão
Author: J. Grzelak
Author: M. Gich
Author: A. Roig
Author: S. Sánchez

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