Intro: 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:
Step 1: Preparing the Parts Before Assembly......
Finish edges of the parts.
Step 2: This Time...we Use Instant Glue....
In stead of solder, all the structures are glued by instant glue, which makes assembly easier and healthier.
Step 3: Wiring the Scanner....
Use solder iron for wiring cables of the scanner.
Step 4: Gluing the Z Axis Transducer of the Scanner
Step 5: Assembling the AFM Head
Step 6: The Optical and Mechanical Parts Are Done!
Just put one magnet on top of the Z transducer.
Step 7: Performance Evaluation
The optomechanical part is connected to a AFM controller
Step 8: Low Cost AFM Calibration Sample: DVD Data Tracks
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)
The DIY AFM with economy AFM controller can successfully measure height of square calibration features 20 nm with contact mode.
Step 10: Measuring 1.4 Nm Features on the TGQ1
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.
Step 11: The DIY AFM With Advanced Controller
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
20 nm Squares and 1.4 nm features are clearly seen.
Step 13: Measuring Nano Particles
Step 14: Resolution Limit Test....
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.