A DIY AFM Whokshop
A DIY AFM Whokshop

There is an DIY AFM workshop with one hobbyist from the States and one professor from India. They assembled their own DIY AFM within 2 hours crafting time.

Here is a link to previous project:

http://www.instructables.com/id/A-Low-Cost-Atomic-Force-Microscope-%E4%BD%8E%E6%88%90%E6%9C%AC%E5%8E%9F%E5%AD%90%E5%8A%9B%E9%A1%AF%E5%BE%AE%E9%8F%A1/

Step 1: Preparing the parts before assembly......

A DIY AFM Whokshop
A DIY AFM Whokshop
A DIY AFM Whokshop

Finish edges of the parts.

Step 2: This time...we use instant glue....

A DIY AFM Whokshop
A DIY AFM Whokshop

In stead of solder, all the structures are glued by instant glue, which makes assembly easier and healthier.

Step 3: Wiring the scanner....

A DIY AFM Whokshop
A DIY AFM Whokshop
A DIY AFM Whokshop

Use solder iron for wiring cables of the scanner.

Step 4: Gluing the Z axis transducer of the scanner

A DIY AFM Whokshop
A DIY AFM Whokshop

Very important!

Step 5: Assembling the AFM head

A DIY AFM Whokshop
A DIY AFM Whokshop
A DIY AFM Whokshop

Again....glue everything.....

Step 6: ?The optical and mechanical parts are done!

A DIY AFM Whokshop

Just put one magnet on top of the Z transducer.

Step 7: Performance evaluation

A DIY AFM Whokshop
A DIY AFM Whokshop

The optomechanical part is connected to a AFM controller

Step 8: Low cost AFM calibration sample: DVD data tracks

A DIY AFM Whokshop

Use the DVD data tracks (pitch= 740 nm) for calibrating scanning range of the scanner.

Step 9: Measuring the AFM calibration sample (NT MDT TGQ1)

A DIY AFM Whokshop

The DIY AFM with economy AFM controller can successfully measure height of square calibration features 20 nm with contact mode.

http://en.wikipedia.org/wiki/Atomic_force_microscopy

Step 10: Measuring 1.4 nm features on the TGQ1

A DIY AFM Whokshop

Surprisingly we found that the DIY AFM can work with non-contact mode (attractive interaction between atoms caused by van-der-Waals forces) which resolves 1.4 nm height feature on the TGQ1.

http://en.wikipedia.org/wiki/Non-contact_atomic_force_microscopy

Step 11: The DIY AFM with advanced controller

A DIY AFM Whokshop

The DIY AFM with advanced AFM controller can clearly see the DVD data tracks when operated in AC (Tapping) mode.

Step 12: The DIY AFM with advanced controller

A DIY AFM Whokshop

20 nm Squares and 1.4 nm features are clearly seen.

Step 13: Measuring nano particles

A DIY AFM Whokshop

Step 14: Resolution limit test....

A DIY AFM Whokshop

The DIY AFM system with 12bits controller can resolve 0.5 nm which is similar to height of 2 carbon atom layers on HOPG (Highly Ordered Pyrolytic Graphite) surface.

 
 

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