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Título: | Nanomechanical coupling enables detection and imaging of 5 nm superparamagnetic particles in liquid |
Autor: | Dietz, Christian CSIC ORCID; Herruzo, Elena T. CSIC; Lozano, José R. CSIC; García García, Ricardo CSIC ORCID | Palabras clave: | Soft matter, liquids and polymers Nanoscale science and low-D systems |
Fecha de publicación: | 17-feb-2011 | Editor: | Institute of Physics Publishing | Citación: | Nanotechnology 22(12): 125708 (2012) | Resumen: | We demonstrate that a force microscope operated in a bimodal mode enables the imaging and detection of superparamagnetic particles down to 5 nm. The bimodal method exploits the nanomechanical coupling of the excited modes to enhance the sensitivity of the higher mode to detect changes in material properties. The coupling requires the presence of nonlinear forces. Remarkably, bimodal operation enables us to identify changes of slowly varying forces (quasi-linear) in the presence of a stronger nonlinear force. Thus, unambiguous identification of single apoferritin (non-magnetic) and ferritin (magnetic) molecules in air and liquid is accomplished. | Versión del editor: | http://dx.doi.org/10.1088/0957-4484/22/12/125708 | URI: | http://hdl.handle.net/10261/47513 | DOI: | 10.1088/0957-4484/22/12/125708 | ISSN: | 0957-4484 | E-ISSN: | 1361-6528 |
Aparece en las colecciones: | (IMN-CNM) Artículos |
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NNano-bimodal-10-rev.pdf | 1,23 MB | Adobe PDF | Visualizar/Abrir |
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