Modification of Gold Surface By Voltage Pulse Using Equipment From NanoSurf

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Background

After Applying Pulses

Background

On (111) oriented gold thin films it is possible to locally modify the surface by applying a voltage pulse (see eg. T. Schaub, Nanotechnology 3 (1991) p77-83). Depending on the polarity of the pulse it is possible to field evaporate tip material onto the surface. In the subsequent series of images the evolution of the deposit can be seen.

AZoNano - The A to Z of Nanotechnology Online - The surface prior the applied pulses

Figure 1. The surface prior the applied pulses. Scan size: 127 nm z-range: 1.0nm

AZoNano - The A to Z of Nanotechnology Online - After applying several pulses (0-4V) using the spectroscopy feature of the easyScan STM software a deposit is visible

Figure 2. After applying several pulses (0-4V) using the spectroscopy feature of the easyScan STM software a deposit is visible. Scan size: 127 nm z-range: 1.0nm

After Applying Pulses

After applying several pulses using the spectroscopy feature of the easyScan software (0-4V) a deposit is visible in the second image. After scanning the same location several times the deposit seems to spread and accumulate at the step fronts.

AZoNano - The A to Z of Nanotechnology Online - Sequence of images taken in 3 minute intervals

Figure 3. Sequence of images taken in 3 minute intervals, all images: scan size: 110 nm and z-range: 1.0nm

Source: Nanosurf

For more information on this source please visit Nanosurf

 

Date Added: Feb 23, 2007 | Updated: Jun 11, 2013
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