Scientific

New The Golden Scanning Tunneling Microscope - STM

- Anfatec's STM Is Made For The Investigation Of Chemical -
Ad-Layers In Droplets Or An Electrochemical Cell

Features:

• Golden (Chemically Resistive) Vibration Isolated STM Body With Implemented Preamplifier
• Computer with PCI Board Based SPM Controller
• Anfatec Scan & Anfatec Present
• 19 “ STM Controller (Extra Low Noise 24 Bit Converters)
• HV Display For z-Direction
• High Voltage Amplifiers For The X-Y-Tube Scanning
• Optional: PC Controlled bi-Potentiostat And Electrochemical Cell
  
  Provided Modes:
  
  
• Constant Height Mode
• Constant Current Mode
• Distance Spectroscopy Of The Tunneling
• Tunneling Voltage Spectroscopy
• dI/dU Spectroscopy

The Golden STM with Damping System	SPM Controller-PC based

New Features :

• Software-Linearisation And Calibration Of The Scanner
• Higher Version Of AMU 2.x With Better Signal To Noise Ratio For The Detection Of Even Smaller Vibration Amplitudes
  Software Type Scanner Linearisation
• 2nd Trace Image Acquisition Mode
• Improved Observability Of The Sample In The Camera, Fine Tread Screws.
  

Applications:

HOPG, Current Image	HOPG, Topographic Image

The System Consists Of:

• The Golden STM Body With Implemented Vibration Damping
• Preamplifier With 100 fA/Hz Noise Level
• Motorized Sample Plate Movement
• High Quality Tube Scanner
  


STM Controller:

• Power Supply For The STM Preamplifier
• HV Supply For The Scanner
• Data Connection To The PC Board AMU2.x That Acquires The Data
• Control For The DC Motor
• 8 x 24-Bit D/A Converters (4 Used For The Standard STM)
• 8 x 24-Bit A/D Converters (1 Used For The Standard STM)
  

Control Computer:

• 64-Bit AMD Processor
• 1 x 17“ TFT Monitor (A Second Monitor Can Be Connected)
• Video Input
  

Installed Software:

• Windows XP Professional In U.K. English
• Anfatec Scan With GNU GPL,
• Anfatec Present
• Anfatec Measurement Interface AMU 2.x (PCI Bus Board With Integrated Lock-In Amplifier)
• Tip Etching Tool
  

Image Of A Gold Surface ( Sputtered Gold Layer On Silicon, Image Range: 200 nm , Height: 2.3 nm)	Vibration Isolation Table

Tools:

• 3 HOPG samples, 10 gold samples, 50 sample holders, tweezers, ...
• Connection cables
• English manual, certain tutorials for students education
  

Control System:

• Up-to-date PC with Windows XP UK English Home Edition
• High-quality and high-speed LockIn-amplifier on PCI-board
• Fast data interface to the SPM-control unit
  
  
  Mechanics & Accessories:
  
  
• The STM is provided with a with an 19” Anfatec-type SPM controller.
• It includes the 150 V amplification for 6 µm scan range.

STM Tungsten Tip Etching Tool HOPG, The tip etching tool is provided with a detailed description and a students practical training advice. It is based on the droplet technique, which was first published in 1999. In combination with a power supply with current limitation one can reach STM tip diameters below 10 nm with over 50 % reproducibility.	STM Tungsten Tip Etching Tool Controller 19” controller, HV noise: < 50 HV output: -150 V ..150 V D/A-noise: 100 A/D noise: 0.3 mV @ 40 kHz bandwidth power supply: ~ 230 V