ФИЗИКО-ХИМИЧЕСКИЕ ОСНОВЫ НАНОТЕХНОЛОГИИ

5. Атомный дизайн

What is Scanning Tunneling Microscopy?
Allows for the imaging of the surfaces of metals and semiconductors at the atomic level.
Developed by Gerd Binnig and Heinrich Rohrer at the IBM Zurich Research Laboratory in 1982.
The two shared half of the 1986 Nobel Prize in physics for developing STM.
Binnig
Rohrer
STM has fathered a host of new atomic probe techniques: Atomic Force Microscopy, Scanning Tunneling Spectroscopy, Magnetic Force Microscopy, Scanning Acoustic Microscopy, etc.

STM: scanning tunneling microscope
tunneling of electrons through air between probe and surface
only conducting material
probe
x-y stage

Basic Principles of STM

Two Modes of Scanning
Constant Height Mode
Constant Current Mode

STM изображения

Examples of STM images…
Pt (100) with vaccancies
Si (111) 7x7 reconstruction
Annealed decanethiol film on Au(111)
Si (111) with terraces and vaccancies

Бранденбургские ворота

Диффузия атомов на поверхности

Атомно-молекулярный дизайн

Смещение атомов по поверхности

Moving atoms one at a time…

Создание треугольной системы атомов

Смещение молекулы иодбензола

Смещение молекул на поверхности

Разложение молекул

Диссоциация

Иодбензол

P-дииодбензол

Реакция Ульмана

Реакция Ульмана