Given the persistent difficulty of getting movies to play from within Microsoft Powerpoint, where possible we have converted all of the movies from the class notes into Apple QuickTime format. These are all then embedded within this single webpage. Click the lecture number (immediately below) to go to the appropriate movies. To play a movie, use the controller bar at the bottom of the movie frame.

Where QuickTime conversion was not possible, certain movies appear in Shockwave Flash format.

(Movies not otherwise explicitly credited were created by: John C. Bean - University of Virginia)

To facilitate viewing of multimedia files on this page, we strongly recommend use of Mozilla Firefox

Lecture 1: What is Nanoscience (link to Powerpoint notes)

Lecture 2: Waves - Generic (link to Powerpoint notes)

Lecture 3: Waves - Electron (link to Powerpoint notes)

Mathcad simulation of standing waves - At each wavelength, waves are plotted eight different times (shown on left axis). The movie then scans through wavelength values from zero up to the full size of the box.

Note that the strongest standing waves appear 1/5, 1/4, 1/3, 1/2, 1/1 along the movie (you can verify this by manually advancing the movie to those points). This corresponds to wavelengths that fit exactly into the box: lambda = L/5, L/4, L/3, L/2, L:

Movies of real water standing waves inside a ring. Movie consists of a series of still pictures showing waves of increasing frequency (decreasing wavelength):

Lecture 4: Microfabrication (link to Powerpoint notes)

Sandia Labs Movies of Spider mites on Micro-electro-mechanical-system (MEMS) chips. In movie on left, note motor at top (likely electrostatic) driving vertical arm down to ratchet and pawl on gear:

These movies are "Courtesy of Sandia National Laboratories, SUMMiTTM Technologies, www.mems.sandia.gov"

Web source: http://mems.sandia.gov/scripts/images.asp

Lecture 5: Science vs. Technology (link to Powerpoint notes)

Lecture 6: The Need for Self-Assembly (link to Powerpoint notes)

Self-assembly of glass spheres on left. Self assembly of floating triangular magnets on right.

"Self-assembly of 5 micrometer glass nanospheres on a mica surface. The spheres are initially suspended in a drop of water on the mica. As the drop evaporates, the spheres are packed together by the surface tension at the drop's edge. Slight irregularities in the packing can be seen, and are the result of irregularly shaped spheres. (300K) Movie by Gordon Shaw."

"Triangles, made of polydimethylsiloxane with magnetized strontium ferrite along the edges, self assemble on the surface of water. The different color triangles are oppositely magnetized so they are expected to have the strongest attractions. The dish and camera are moved circularly to produce a wave that moves the pieces. The movie plays in real time." Movie by G.C. Lisensky Note: This is only the first 60 seconds of the original eight minute movie.

Movies on self-assembly from the "Interdisciplinary Education Group," NSF Materials Research Science and Engineering Center (MRSEC), University of Wisconsin.

Web source:http://www.mrsec.wisc.edu/Edetc/cineplex/self/text.html

 

Ultra-high vacuum Molecular Beam Epitaxy (MBE) growth of GeSi atomic layers

Web Source: UVA Virtual Lab http://www.virlab.virginia.edu/VL/MBE.htm

 

Proposed Nanoscale Quantum Cellular Automata (QCA) Circuits

Square array of Q-dots with affinity for electrons So small & close (~30 nm) that charges repel That end up only holding two charges

Two alternate charging patterns => Digital 1 and 0! Which can be manipulated by input signal on wire.

And charge configuration will then propagate along a "wire" of such QCA elements!

Web Source: UVA Virtual Lab http://www.virlab.virginia.edu/VL/QCA_cells.htm

 

QCA Majority, AND, OR gate

QCA Inverter

Or a complete QCA Binary Adder!

Web Source: UVA Virtual Lab http://www.virlab.virginia.edu/VL/QCA_logic.htm

 

Schematic of "Quantum Fortress" Atomic Self-Assembly

STEP 1) Strained Layer Epitaxy: Compression of bonds between larger Ge atoms so that Ge layer will fit on more tightly packed Si substrate.

STEP 2) Spontaneous formation of atomic scale valley. Compressed Ge atoms to side then relax into this valley.

STEP 3) Expanded Ge around valley then closer to natural spacing's of Ge atoms.

Thus attracts subsequently deposited Ge atoms growing "Quantum Fortress" walls.

Source of animations: John C. Bean, University of Virginia

 

Langmuir-Blodgett molecular monolayer self-assembly

Molecules floating on the surface of a tank are compressed until they form a densely packed monolayer. This is sensed by the "Wilhelmy plate" at the left of the tank. The plate is suspended from a microbalance with its edge partially immersed in the solution. As the molecules compress, surface tension (and hence the pull on the plate and balance) increase, as plotted at the top. The final sharp increase indicates formation of the densified monolayer.		A molecular monolayer is then transferred to a substrate. If the substrate is then reinserted into the bath, each side is coated with a second monolayer of molecules. Process can then be repeated to controllably grow multi-monolayer structures.

Langmuir-Blodgett animations courtesy of Professor Arend-Jan Schouten, Laboratory of Polymer Chemistry, University of Groningen, The Netherlands

Web source: http://polchajs.fmns.rug.nl/files/jv/lb.html

 

Lecture 7: Molecular Self-Assembly - Part I (link to Powerpoint notes)

Lecture 8: Molecular Self-Assembly - Part II (link to Powerpoint notes)

Lecture 9: DNA Self-Assembly (link to Powerpoint notes)

Lecture 10: How We See at the Nanoscale

Lecture 11: Nanoelectronic Device Research

Lecture 12: The Fictions of Nano Science Fiction

Lecture 13: Fears and Ethical Challenges of Nanotechnology