| Title |
One-Step Biosynthesis of Soft Magnetic Bacterial Cellulose Spheres with Localized Nanoparticle Functionalization |
| ID_Doc |
19863 |
| Authors |
Roig-Sanchez, S; Torrecilla, O; Floriach-Clark, J; Parets, S; Levkin, PA; Roig, A; Laromaine, A |
| Title |
One-Step Biosynthesis of Soft Magnetic Bacterial Cellulose Spheres with Localized Nanoparticle Functionalization |
| Year |
2021 |
| Published |
Acs Applied Materials & Interfaces, 13.0, 46 |
| DOI |
10.1021/acsami.1c17752 |
| Abstract |
Actuated structures are becoming relevant in medical fields; however, they call for flexible/soft-base materials that comply with biological tissues and can be synthesized in simple fabrication steps. In this work, we extend the palette of techniques to afford soft, actuable spherical structures taking advantage of the biosynthesis process of bacterial cellulose. Bacterial cellulose spheres (BCS) with localized magnetic nanoparticles (NPs) have been biosynthesized using two different onepot processes: in agitation and on hydrophobic surface-supported static culture, achieving core-shell or hollow spheres, respectively. Magnetic actuability is conferred by superparamagnetic iron oxide NPs (SPIONs), and their location within the structure was finely tuned with high precision. The size, structure, flexibility and magnetic response of the spheres have been characterized. In addition, the versatility of the methodology allows us to produce actuated spherical structures adding other NPs (Au and Pt) in specific locations, creating Janus structures. The combination of Pt NPs and SPIONs provides moving composite structures driven both by a magnetic field and a H2O2 oxidation reaction. Janus Pt/ SPIONs increased by five times the directionality and movement of these structures in comparison to the controls. |
| Author Keywords |
3D structure; magnetic bacterial cellulose; actuator; nanocomposite; Janus sphere; SPIONs; nanoparticles |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000751884800092 |
| WoS Category |
Nanoscience & Nanotechnology; Materials Science, Multidisciplinary |
| Research Area |
Science & Technology - Other Topics; Materials Science |
| PDF |
https://pubs.acs.org/doi/pdf/10.1021/acsami.1c17752
|