STM manual - Operating Instructions easyScan E-STM Version...

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Operating Instructions easy Scan E-STM Version 2.1
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2 ‘N ANOSURF AND THE N ANOSURF L OGO ARE TRADEMARKS OF N ANOSURF AG, REGISTERED AND / OR OTHERWISE PROTECTED IN VARIOUS COUNTRIES . © J ANUARY 2004 BY N ANOSURF AG, S WITZERLAND , P ROD .:BT00655, V 2.1 R 1
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3 Table of Contents Introduction 4 What is STM? . ...................................................................................... 4 Scanning with the E-STM . .................................................................... 5 (Un)packing and Installation 8 Unpacking the instrument . .................................................................... 8 Hardware Installation . ........................................................................... 9 Software installation. ........................................................................... 11 System requirements 11 Installation Procedure 11 Simulated microscope 14 Preparing for Measurement 15 Preparing and installing the STM tip . ................................................. 15 Preparing the sample . ........................................................................ 17 Installing the sample . .......................................................................... 19 First Measurements 20 Starting the microscope . ..................................................................... 20 Approaching the tip . ............................................................................ 21 1. Coarse approach by hand 21 2. Fine approach by piezo motor 22 3.Automatic approach 23 Start measurement . ............................................................................ 24 Adjusting the sample’s tilt coordinates . .............................................. 25 Achieving atomic resolution . ............................................................... 27 Snapshots of images . ......................................................................... 30 STM Measurement modes . ................................................................ 30 Judging the quality of the images . ...................................................... 31 The graphite surface . .......................................................................... 33 Measuring Gold . ................................................................................. 34 Finish measuring . ............................................................................... 36 Turning off and storing the instrument 36 Maintenance 38 Scan head 38 Scan electronics 39 Problems and Solutions 40 Technical Data 44
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4 Introduction This manual gives instructions on how to set up and use your Nanosurf easyScan E-STM system. The aim is to help people who don’t have a good knowledge of physics to get pictures of atomic resolution easily. This intro- duction chapter gives some general information on the scanning tunneling microscopy technique, and its implementation in the easyScan STM. The next chapter, (Un)packing and Installation , should be read when installing your easyScan system. The chapters Preparing for Measurement and First Measurements should be read by all users, as they contain useful instructions for your everyday measurements. The other chapters give more informa- tion for advanced users. Those who need a more detailed description of the functions of the easyScan software should refer to the Software Reference manual. What is STM? Microscopy is one of the most exciting scientific techniques. The insight into small dimensions has led to a new understanding of the structure of materials and forms of life. With the help of the scanning tunneling microscope (STM) it is possible to look into the fascinating world of the atoms. This completely new micros- copy technique works without focusing elements and features atomic reso- lution (laterally and vertically). The Scanning Tunneling Microscope was developed by Gerd Binnig and Heinrich Rohrer in the early 80’s at the IBM research laboratory in Rüschlikon, Switzerland. For this revolutionary innovation Binnig and Rohrer were awarded the Nobel prize in Physics in 1986. In the STM, a small sharp conducting tip is scanned across the sample’s surface, so close that the so-called ‘tunneling current’ can flow. With the help of that current the tip-surface distance can be controlled very precisely.
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This note was uploaded on 03/22/2011 for the course PHYS 425 taught by Professor Guang during the Spring '09 term at Seoul National.

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STM manual - Operating Instructions easyScan E-STM Version...

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