The heart of every AFM is the cantilever that does the imaging. To achieve this the AFM must oscillate near its resonance. This is normally achieved using a shaking piezo. In air this works well but in fluids it can lead to poor quality imaging and instability.
Modern AFMs now use blueDrive™ photothermal excitation. This system uses a 405nm laser to cleanly drive the cantilever. The result – higher resolution, better stability, and ease of use.
Dr Shane Huntington OAM (@DrShaneRRR) is the Founder and Director of the Innovation Group Pty Ltd, a scientific equipment supplier and communication course provider. Shane has been building, using and selling AFMs for over 25 years.
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