Magnetic Force Microscopy in Liquids

• Published in: Small (Weinheim an der Bergstrasse, Germany) Vol. 11; no. 36; pp. 4731 - 4736
• Main Authors: Ares, Pablo, Jaafar, Miriam, Gil, Adriana, Gómez-Herrero, Julio, Asenjo, Agustina
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 01.09.2015; Wiley Subscription Services, Inc
• Subjects: Air; Animals; Atomic force microscopy; Contrast Media - chemistry; Humans; Liquids; Magnetic fields; magnetic force microscopy; magnetic nanoparticles; Magnetics; Magnetite; Magnetite Nanoparticles - chemistry; Media; Microscopy; Microscopy, Atomic Force - methods; nanobiotechnology; Nanomedicine - methods; Nanoparticles; Nanostructure; Nanostructured materials; Nanostructures - chemistry; Nanotechnology; Nanotechnology - methods; Particle Size; Strategy; Succimer - chemistry; Water; magnetic force microscopy; microscopy; nanobiotechnology; liquids; magnetic nanoparticles
• ISSN: 1613-6810; 1613-6829
• DOI: 10.1002/smll.201500874

In this work, the use of magnetic force microscopy (MFM) to acquire images of magnetic nanostructures in liquid environments is presented. Optimization of the MFM signal acquisition in liquid media is performed and it is applied to characterize the magnetic signal of magnetite nanoparticles. The ability for detecting magnetic nanostructures along with the well‐known capabilities of atomic force microscopy in liquids suggests potential applications in fields such as nanomedicine, nanobiotechnology, or nanocatalysis. Magnetic force microscopy (MFM) in liquids is presented. Magnetic contrast in different media is studied and optimized for liquids. MFM is successfully applied to the study of magnetite nanoparticles. The ability of measuring magnetic nanostructures along with the well‐known capabilities of atomic force microscopy in liquids suggests new strategies in the characterization of relevant systems in fields such as nanomedicine, biology, or nanocatalysis.