| Detecting the magnetic response of iron oxide capped organosilane nanostructures using magnetic sample modulation and atomic force microscopy. | |
| | |
MedLine Citation:
|
PMID: 19453164 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
A new imaging strategy using atomic force microscopy (AFM) is demonstrated for mapping magnetic domains at size regimes below 100 nm. The AFM-based imaging mode is referred to as magnetic sample modulation (MSM), since the flux of an AC-generated electromagnetic field is used to induce physical movement of magnetic nanomaterials on surfaces during imaging. The AFM is operated in contact mode using a soft, nonmagnetic tip to detect the physical motion of the sample. By slowly scanning an AFM probe across a vibrating area of the sample, the frequency and amplitude of vibration induced by the magnetic field is tracked by changes in tip deflection. Thus, the AFM tip serves as a force and motion sensor for mapping the vibrational response of magnetic nanomaterials. Essentially, MSM is a hybrid of contact mode AFM combined with selective modulation of magnetic domains. The positional feedback loop for MSM imaging is the same as that used for force modulation and contact mode AFM; however, the vibration of the sample is analyzed using channels of a lock-in amplifier. The investigations are facilitated by nanofabrication methods combining particle lithography with organic vapor deposition and electroless deposition of iron oxide, to prepare designed test platforms of magnetic materials at nanometer length scales. Custom test platforms furnished suitable surfaces for MSM characterizations at the level of individual metal nanostructures. |
| | |
Authors:
|
Jie-Ren Li; Brian R Lewandowski; Song Xu; Jayne C Garno |
Related Documents
:
|
7997564 - Mr imaging field strength: prospective evaluation of the diagnostic accuracy of mr for ... 3945744 - Occult cerebral vascular malformations: high-field mr imaging. 20373424 - Induced magnetic force in human heads exposed to 4 t mri. 19810304 - An analysis of force between attractive magnets used in orthodontics. 7716604 - Cerebral vasculitis complicating rheumatoid arthritis. 7619614 - Detectability of hypervascular hepatocellular carcinoma by arterial phase images of mr ... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: Analytical chemistry Volume: 81 ISSN: 1520-6882 ISO Abbreviation: Anal. Chem. Publication Date: 2009 Jun |
Date Detail:
|
Created Date: 2009-06-12 Completed Date: 2009-08-14 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0370536 Medline TA: Anal Chem Country: United States |
Other Details:
|
Languages: eng Pagination: 4792-802 Citation Subset: IM |
Affiliation:
|
Department of Chemistry and the Center for BioModular Multi-Scale Systems, Louisiana State University, 232 Choppin Hall, Baton Rouge, Louisiana 70803, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Ferric Compounds
/
analysis* Magnetics* Microscopy, Atomic Force / instrumentation, methods* Nanostructures / chemistry*, ultrastructure Silanes / chemistry* Surface Properties Vibration |
| Chemical | |
Reg. No./Substance:
|
0/Ferric Compounds; 0/Silanes; 1309-37-1/ferric oxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Preparation and characterization of oxidized starch polymer microgels for encapsulation and controll...
Next Document: Correlating mechanical properties with aggregation processes in electrochemically fabricated collage...