Non-contact atomic force microscopy
1Non-contact atomic force microscopy (nc-AFM), also known as dynamic force microscopy (DFM), is a mode of atomic force microscopy, which itself is a type of scanning probe microscopy. In nc-AFM a sharp probe is moved close (order of Angstroms) to the surface under study, the probe is then raster scanned across the surface, the image is then constructed from the force interactions during the scan. The probe is connected to a resonator, usually a silicon cantilever or a quartz crystal resonator. During measurements the sensor is driven so that it oscillates. The force interactions are measured either by measuring the change in amplitude of the oscillation at a constant frequency just off resonance (amplitude modulation) or by measuring the change in resonant frequency directly using a feedback circuit (usually a phase-locked loop) to always drive the sensor on resonance (frequency modulation).
Source: https://en.wikipedia.org/wiki/Non-contact_atomic_force_microscopy
Created with WikipediaReaderSentry (c) WikipediaReader
Images and videos sourced from Pexels (https://www.pexels.com)
Other Videos By WikiReader
| 2023-10-09 | Stretch Armstrong and the Flex Fighters |
| 2023-10-09 | Touring car racing |
| 2023-10-08 | Lala Karmela |
| 2023-10-08 | 1976 swine flu outbreak |
| 2023-10-08 | Chaulukya dynasty |
| 2023-10-08 | GX-2 |
| 2023-10-07 | Claudio Naranjo |
| 2023-10-07 | Typographical error |
| 2023-10-07 | Armenian cuisine |
| 2023-10-07 | Hurricane Flora |
| 2023-10-07 | Non-contact atomic force microscopy |
| 2023-09-23 | Eutychius of Constantinople |
| 2023-09-23 | Sandra Dickinson |
| 2023-09-22 | Alpert Medical School |
| 2023-09-22 | Złotoryja |
| 2023-09-22 | Sable |
| 2023-09-22 | Shoshenq IV |
| 2023-09-22 | IRT Flushing Line |
| 2023-09-22 | Did you know that artist Joan Brigham is best known for her work with steam? |
| 2023-09-22 | International house of pancakes |
| 2023-09-21 | Greenpeace Lyng GM maize action |