False-colour scanning tunnelling micrograph (STM) of DNA. A sample of uncoated,double-stranded DNA was dissolved in a salt solution & deposited on graphite prior to being imaged in air by the STM. An STM image is formed by scanning a fine point just above the specimen surface & electronically recording the height of the point as it moves. This image shows a section of a double-stranded DNA molecule (a DNA duplex),with the coils of the helix appearing as the row of orange/yellow peaks in the centre of the image. The average distance between each peak is 3.5 nanometers. Magnification: x1,500,000 at 6x7cm size | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Lawrence Berkeley Laboratory |
Bildgröße: | 4126 px × 3184 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |